CN114513485A - Method, apparatus, device, system and readable storage medium for obtaining mapping rules - Google Patents

Abstract

The embodiment of the application discloses a method, a device, equipment and a system for obtaining a mapping rule and a readable storage medium, and belongs to the technical field of communication. Taking the example that the first communication device acquires the mapping rule, the method includes: a first communication device receives a first message sent by a second communication device, the first communication device and the second communication device are located in a first type of network, the first message carries information of a first mapping rule configured on the second communication device, the first mapping rule is used for address mapping between an address in the first type of network and an address in the second type of network, and the first type of network is different from the second type of network; the first communication device acquires the first mapping rule according to the information of the first mapping rule. The first communication device can reduce the configuration and maintenance workload of the mapping rule by dynamically learning the first mapping rule on the second communication device, thereby improving the efficiency of obtaining the mapping rule and reducing the maintenance cost.

Description

Method, apparatus, device, system and readable storage medium for obtaining mapping rules

technical field

The embodiments of the present application relate to the field of communications, and in particular, to a method, apparatus, device, system, and readable storage medium for acquiring a mapping rule.

Background technique

With the development of communication technology, the Internet Protocol Version 4 (IPv4) network is gradually transitioning to the Internet Protocol Version 6 (IPv6) network. An IPv4 network is a partial network isolated from an IPv6 network. In order to ensure the operation of IPv4 services and the development of continuously updated IPv6 services, the scenario from IPv4 to IPv6 is the research focus of the long-term evolution technical solution. The mapping between IPv4 addresses and IPv6 addresses has become an effective solution, due to the stateless mapping and double translation technology (the mapping of address and port using translation, MAP-T) / stateless mapping and double encapsulation technology ( the mapping of address and port using encapsulation, MAP-E) combines stateless and double translation/encapsulation, and has great advantages in technical performance, reliability and customer deployment costs, so MAP-T/MAP-E It has become a mapping rule with high attention.

When acquiring the mapping rules in the related art, it is necessary to manually deploy the mapping rules of both communication parties on the communication device, which takes a long time to configure, resulting in low efficiency in acquiring the mapping rules and high maintenance costs.

SUMMARY OF THE INVENTION

The present application provides a method, apparatus, device, system and readable storage medium for acquiring mapping rules, which are used to solve the problems of low efficiency in acquiring mapping rules and high maintenance cost.

A first aspect provides a method for acquiring a mapping rule, the method comprising: a first communication device receiving a first packet sent by a second communication device, where the first communication device and the second communication device are located in a network of a first type , the first message carries the information of the first mapping rule configured on the second communication device, and the first mapping rule is used for address mapping between addresses in the network of the first type and addresses in the network of the second type, The network of the first type is different from the network of the second type; the first communication device acquires the first mapping rule according to the information of the first mapping rule.

The second communication device sends the information of the first mapping rule configured at the local end to the first communication device, and the first communication device acquires the first mapping rule on the remote second communication device through dynamic learning, which is used for the first type of mapping rule. Address mapping between addresses in the network and addresses in the second type of network, so as to ensure that the devices at both ends adopt the same mapping rules for address mapping; it can reduce the configuration and maintenance workload of mapping rules, and improve the efficiency of obtaining mapping rules , and reduce maintenance costs.

In a possible implementation manner, the information of the first mapping rule is a MAP route generated based on the first mapping rule.

Acquiring the first mapping rule by the first communication device according to the information of the first mapping rule includes: the first communication device generating the first mapping rule according to the MAP route. In this way, the second communication device carries the information of the first mapping rule in the form of routing in the first message and transmits it to the first communication device. In addition, the information of the first mapping rule in the routing form may be carried in the first packet in a TLV format.

In a possible implementation manner, before the first communication device receives the first packet sent by the second communication device, the method further includes: establishing a MAP neighbor relationship between the first communication device and the second communication device.

In a possible implementation manner, establishing a MAP neighbor relationship between the first communication device and the second communication device includes: the first communication device sends a packet carrying the first MAP address cluster to the second communication device; the first communication device receives The packet that is sent by the second communication device and carries the second MAP address cluster.

In a possible implementation manner, the first packet further includes attribute information, where the attribute information includes a mapping address, a port MAP field type, and a MAP field identifier.

In a possible implementation manner, the attribute information further includes a route identifier and a route target. For example, the route identifier is a VPN route identifier, which is used to identify different VPNs. The routing target is the VPN routing target, which is used to control the publication of VPN routing information.

In a possible implementation manner, the information of the first mapping rule and the attribute information are both carried in the field of the network layer reachability information NLRI of the first packet.

In a possible implementation manner, the information of the first mapping rule is carried in the network layer reachability information field of the first packet, and the attribute information is carried in the extended attribute field of the first packet. The information and attribute information of the first mapping rule may be carried in the same field or in different fields, and the carrying manner is more flexible.

In a possible implementation manner, the information of the first mapping rule includes at least one of address information corresponding to the basic mapping rule BMR, address information corresponding to the forwarding mapping rule FMR, and address information corresponding to the default mapping rule DMR.

In a possible implementation manner, the address information corresponding to the BMR includes an Internet Protocol version 6 IPv6 prefix corresponding to the BMR, an IPv6 prefix length, an Internet Protocol version 4 IPv4 prefix, an IPv4 prefix length, an EA bit length, and a PSID offset. .

In a possible implementation manner, the address information corresponding to the FMR includes the IPv6 prefix of the Internet Protocol version 6 corresponding to the FMR, the IPv6 prefix length, the IPv4 prefix of the Internet Protocol version 4, the IPv4 prefix length, the EA bit length, and the PSID offset. .

In a possible implementation manner, the address information corresponding to the DMR includes an IPv6 prefix corresponding to the Internet Protocol Version 6 and an IPv6 prefix length corresponding to the DMR.

In a possible implementation manner, the address information corresponding to the DMR includes the IPv6 address of the Internet Protocol version 6 and the IPv6 address prefix length corresponding to the border relay BR device.

In a possible implementation manner, the method further includes: the first communication device sends a second packet to the second communication device, where the second packet carries information of the second mapping rule configured on the first communication device, and the second packet carries information of the second mapping rule configured on the first communication device. The mapping rule is used for address mapping between addresses in the network of the first type and addresses in the network of the second type, and the information of the second mapping rule is used for the second communication device to obtain the second mapping rule. In addition to learning the first mapping rule configured on the second communication device, the first communication device sends information about the second mapping rule configured on the first communication device to the second communication device, so that the second communication device The second mapping rule on the first communication device can also be learned.

In a possible implementation manner, the first type of network is an IPv4 network, the second type of network is an IPv6 network, or the first type of network is an Internet Protocol Version 6 IPv6 network, and the second type of network is the Internet Protocol version 4 IPv4 network; the first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the mapping between the second IPv4 address and the second IPv6 address.

In a possible implementation manner, the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server; or, the first communication device is a broadband access device, and the second communication device is a MAP BR device; or, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device.

In a possible implementation manner, after the first communication device acquires the first mapping rule according to the information of the first mapping rule, the method further includes: the first communication device receives a third packet, and the source address of the third packet is the first IPv6 address, the destination address of the third packet is the second IPv6 address; the first communication device maps the source address of the third packet from the first IPv6 address to the first IPv4 address based on the first mapping rule, based on the second mapping rule The destination address of the third packet is mapped from the second IPv6 address to the second IPv4 address. In the process of packet transmission, through address mapping, packets can be transmitted from one IPv4 network to another IPv4 network after traversing an IPv6 network, thereby ensuring the operation of IPv4 services.

In a possible implementation manner, after the first communication device obtains the first mapping rule according to the information of the first mapping rule, the method further includes: the first communication device obtains a fourth packet, and the source address of the fourth packet is the second IPv4 address, the destination address of the fourth packet is the first IPv4 address; the first communication device maps the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, based on the second mapping rule The destination address of the fourth packet is mapped from the first IPv4 address to the first IPv6 address to obtain the fifth packet; the first communication device sends the fifth packet.

In a possible implementation manner, after the first communication device obtains the first mapping rule according to the information of the first mapping rule, the method further includes: the first communication device stores the first mapping rule as a routing table entry, and the routing table entry uses for transmitting messages.

In a possible implementation manner, when the first communication device is a broadband access server, after the first communication device acquires the first mapping rule according to the information of the first mapping rule, the method further includes: the first communication device communicates with the third The device sends a sixth packet, so that the third communication device performs the address mapping between the address in the network of the first type and the address in the network of the second type according to the first mapping rule; wherein, the sixth packet carries the first information of a mapping rule, the third communication device is a user edge CE device.

In a second aspect, a method for acquiring a mapping rule is provided, the method comprising: acquiring, by a first communication device, information of a first mapping rule configured on the first communication device, where the first mapping rule is used in a network of a first type Address mapping between addresses and addresses in the second type of network; the first communication device sends a first packet to the second communication device, the first packet carries the information of the first mapping rule, and the information of the first mapping rule is used The first mapping rule is obtained from the second communication device, the first communication device and the second communication device are located in a first type of network, and the first type of network is different from the second type of network.

The first communication device sends the information of the first mapping rule configured on the first communication device to the second communication device, so that the second communication device can dynamically learn the first mapping rule on the first communication device without manual configuration, Therefore, the workload of configuring and maintaining the mapping rules can be reduced, thereby improving the efficiency of acquiring the mapping rules and reducing the maintenance cost.

In a possible implementation manner, acquiring the information of the first mapping rule configured on the first communication device by the first communication device includes: the first communication device generates a mapping address and a port MAP route based on the first mapping rule, and routes the MAP route information as the first mapping rule. In this way, the first communication device carries the information of the first mapping rule in the form of routing in the first message and transmits it to the second communication device. In addition, the information of the first mapping rule in the routing form may be carried in the first packet in a TLV format.

In a possible implementation manner, the method further includes: the first communication device receives a second packet sent by the second communication device, the second packet carries information of the second mapping rule configured on the second communication device, the second The mapping rule is used for address mapping between addresses in the network of the first type and addresses in the network of the second type; the first communication device generates the second mapping rule according to the information of the second mapping rule.

In addition to causing the second communication device to learn the first mapping rule configured on the first communication device, the second communication device enables the first communication device to transmit information about the second mapping rule configured on the second communication device to the first communication device. The device can also learn the second mapping rule on the second communication device.

In a possible implementation manner, the first type of network is an Internet Protocol version 4 IPv4 network, the second type of network is an Internet Protocol version 6 IPv6 network, or the first type of network is an Internet Protocol version 6 IPv6 network. Version 6 IPv6 network, the network of the second type is the Internet Protocol Version 4 IPv4 network; the first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the second IPv4 A mapping between the address and the second IPv6 address.

In a possible implementation manner, the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server; or, the first communication device is a broadband access server, and the second communication device is a MAP BR device; or, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device.

In a possible implementation manner, after the first communication device generates the second mapping rule according to the information of the second mapping rule, the method further includes: the first communication device obtains a seventh packet, and the source address of the seventh packet is the first IPv4 address, the destination address of the seventh packet is the second IPv4 address; the first communication device maps the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, based on the second mapping rule The destination address of the seventh packet is mapped from the second IPv4 address to the second IPv6 address to obtain a third packet; the first communication device sends the third packet.

In a possible implementation manner, after the first communication device generates the second mapping rule according to the information of the second mapping rule, the method further includes: the first communication device receives a fifth packet, and the source address of the fifth packet is the second IPv6 address, the destination address of the fifth packet is the first IPv6 address; the first communication device maps the source address of the fifth packet from the second IPv6 address to the second IPv4 address based on the second mapping rule, based on the first mapping rule The destination address of the fifth packet is mapped from the first IPv6 address to the first IPv4 address.

In a third aspect, an apparatus for acquiring a mapping rule is provided, and the apparatus is applied to a first communication device, including:

A first receiving module, configured to receive a first packet sent by a second communication device, where the first communication device and the second communication device are located in a network of a first type, and the first packet carries a first mapping configured on the second communication device The information of the rule, the first mapping rule is used for the address mapping between the address in the network of the first type and the address in the network of the second type, and the network of the first type is different from the network of the second type;

The first obtaining module is configured to obtain the first mapping rule according to the information of the first mapping rule.

In a possible implementation manner, the information of the first mapping rule is a mapping address and a port MAP route generated based on the first mapping rule.

In a possible implementation manner, the device further includes:

An establishing module is configured to establish a MAP neighbor relationship with the second communication device.

In a possible implementation manner, the establishment module is configured to send a message carrying the first MAP address cluster to the second communication device; and receive a message carrying the second MAP address cluster sent by the second communication device.

In a possible implementation manner, the first packet further includes attribute information, where the attribute information includes a mapping address, a port MAP field type, and a MAP field identifier.

In a possible implementation manner, the attribute information further includes a route identifier and a route target.

In a possible implementation manner, the information of the first mapping rule and the attribute information are both carried in the field of the network layer reachability information NLRI of the first packet.

In a possible implementation manner, the information of the first mapping rule is carried in the network layer reachability information field of the first packet, and the attribute information is carried in the extended attribute field of the first packet.

In a possible implementation manner, the information of the mapping rule includes at least one of address information corresponding to the basic mapping rule BMR, address information corresponding to the forwarding mapping rule FMR, and address information corresponding to the default mapping rule DMR.

In a possible implementation manner, the address information corresponding to the BMR includes an Internet Protocol version 6 IPv6 prefix corresponding to the BMR, an IPv6 prefix length, an Internet Protocol version 4 IPv4 prefix, an IPv4 prefix length, an EA bit length, and a port set identifier PSID. Offset.

In a possible implementation manner, the address information corresponding to the FMR includes the IPv6 prefix of the Internet Protocol version 6 corresponding to the FMR, the IPv6 prefix length, the IPv4 prefix of the Internet Protocol version 4, the IPv4 prefix length, the EA bit length, and the port set identifier PSID. Offset.

In a possible implementation manner, the address information corresponding to the DMR includes an IPv6 prefix corresponding to the Internet Protocol Version 6 and an IPv6 prefix length corresponding to the DMR.

In a possible implementation manner, the address information corresponding to the DMR includes the IPv6 address of the Internet Protocol version 6 and the IPv6 address prefix length corresponding to the border relay BR device.

In a possible implementation manner, the apparatus further includes:

The first sending module is configured to send a second message to the second communication device, where the second message carries the information of the second mapping rule configured on the first communication device, and the second mapping rule is used for Address mapping between addresses and addresses in the second type of network, and the information of the second mapping rule is used by the second communication device to obtain the second mapping rule.

In a possible implementation manner, the first type of network is an Internet Protocol version 4 IPv4 network, the second type of network is an Internet Protocol version 6 IPv6 network, or the first type of network is an Internet Protocol version 6 network IPv6 network, the second type of network is the Internet Protocol Version 4 IPv4 network;

The first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the mapping between the second IPv4 address and the second IPv6 address.

In a possible implementation manner, the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server;

Or, the first communication device is a broadband access server, and the second communication device is a MAP BR device;

Alternatively, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device.

In a possible implementation manner, the device further includes:

A second receiving module, configured to receive a third packet, where the source address of the third packet is the first IPv6 address, and the destination address of the third packet is the second IPv6 address;

The first mapping module is configured to map the source address of the third packet from the first IPv6 address to the first IPv4 address based on the first mapping rule, and map the destination address of the third packet from the second IPv6 address based on the second mapping rule. Mapped to the second IPv4 address.

In a possible implementation manner, the device further includes:

A second obtaining module, configured to obtain a fourth packet, where the source address of the fourth packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address;

The second mapping module is configured to map the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, and map the destination address of the fourth packet from the first IPv4 address based on the second mapping rule Mapping to the first IPv6 address to obtain the fifth packet;

The second sending module is used for sending the fifth message.

In a possible implementation manner, the device further includes:

The storage module is used for storing the first mapping rule as a routing table entry, and the routing table entry is used for transmitting the message.

In a possible implementation manner, when the first communication device is a broadband access server, the apparatus further includes: a third sending module, configured to send a sixth packet to the third communication device, so that the third communication device Execute address mapping between addresses in the network of the first type and addresses in the network of the second type according to the first mapping rule; wherein, the sixth packet carries the information of the first mapping rule, and the third communication device is the user edge CE equipment.

In a fourth aspect, a device for acquiring a mapping rule is provided, the device comprising:

The first acquisition module is used to acquire the information of the first mapping rule configured on the first communication device, and the first mapping rule is used for the address mapping between the address in the network of the first type and the address in the network of the second type ;

A first sending module, configured to send a first packet to the second communication device, where the first packet carries information of the first mapping rule, and the information of the first mapping rule is used by the second communication device to obtain the first mapping rule, and the first The communication device and the second communication device are located on a first type of network, which is different from the second type of network.

In a possible implementation manner, the first obtaining module is configured to generate the mapped address and the port MAP route based on the first mapping rule, and use the MAP route as the information of the first mapping rule.

In a possible implementation, the device further includes:

The first receiving module is configured to receive a second packet sent by the second communication device, where the second packet carries information of the second mapping rule configured on the second communication device, and the second mapping rule is used in the first type of network address mapping between addresses in the second type of networks and addresses in networks of the second type;

The second obtaining module is configured to obtain the second mapping rule according to the information of the second mapping rule.

In a possible implementation manner, the first type of network is an Internet Protocol version 4 IPv4 network, the second type of network is an Internet Protocol version 6 IPv6 network, or the first type of network is an Internet Protocol version 6 network IPv6 network, the second type of network is the Internet Protocol version 4 IPv4 network; the first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the second IPv4 address and the second Mapping between IPv6 addresses.

In a possible implementation manner, the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server;

Or, the first communication device is a broadband access server, and the second communication device is a MAP BR device;

Alternatively, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device.

In a possible implementation, the device further includes:

a third obtaining module, configured to obtain a seventh packet, where the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address;

The first mapping module is configured to map the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, and map the destination address of the seventh packet from the second IPv4 address based on the second mapping rule. Mapping to the second IPv6 address to obtain the third packet;

The second sending module is used for sending the third message.

In a possible implementation, the device further includes:

A second receiving module, configured to receive a fifth packet, where the source address of the fifth packet is the second IPv6 address, and the destination address of the fifth packet is the first IPv6 address;

The second mapping module is configured to map the source address of the fifth packet from the second IPv6 address to the second IPv4 address based on the second mapping rule, and map the destination address of the fifth packet from the first IPv6 address based on the first mapping rule Mapped to the first IPv4 address.

In a fifth aspect, a communication device is provided, comprising a processor, the processor is coupled to a memory, and at least one program instruction or code is stored in the memory, and the at least one program instruction or code is loaded and executed by the processor, so that the communication device realizes The method for obtaining a mapping rule according to any one of the first aspect or the second aspect.

A sixth aspect provides a computer-readable storage medium, where at least one program instruction or code is stored in the storage medium, and when the program instruction or code is loaded and executed by a processor, the computer implements the method as described in the first aspect or the second aspect. Any of the described methods for obtaining mapping rules.

A seventh aspect provides a system for acquiring mapping rules, the system includes a first communication device and a second communication device, the first communication device is configured to execute the second aspect or any possible implementation of the second aspect The method for acquiring a mapping rule according to the method, the second communication device is configured to execute the method for acquiring a mapping rule according to the first aspect or any possible implementation manner of the first aspect.

Another communication device is also provided that includes a transceiver, a memory, and a processor. The transceiver, the memory and the processor communicate with each other through an internal connection path, the memory is used for storing instructions, and the processor is used for executing the instructions stored in the memory to control the transceiver to receive signals and control the transceiver to send signals , and when the processor executes the instructions stored in the memory, it causes the processor to execute the method in the first aspect or any possible implementation manner of the first aspect, or execute the second aspect or any one of the second aspect method in a possible implementation.

As an exemplary embodiment, the processor is one or more, and the memory is one or more.

As an exemplary embodiment, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

In a specific implementation process, the memory may be a non-transitory memory, such as a read only memory (ROM), which may be integrated with the processor on the same chip, or may be separately provided in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting manner of the memory and the processor.

A computer program (product) is provided, the computer program (product) comprising: computer program code which, when executed by a computer, causes the computer to perform the methods of the above aspects.

A chip is provided, including a processor for invoking and executing instructions stored in a memory, so that a communication device on which the chip is installed performs the methods in the above-mentioned aspects.

Another chip is provided, including: an input interface, an output interface, a processor, and a memory, the input interface, the output interface, the processor, and the memory are connected through an internal connection path, and the processor is used to execute all The code in the memory, when the code is executed, the processor is configured to perform the methods of the above aspects.

Description of drawings

1 is a schematic structural diagram of an implementation environment provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

3 is a schematic structural diagram of another communication system provided by an embodiment of the present application;

4 is a flowchart of a method for obtaining a mapping rule provided by an embodiment of the present application;

5 is a schematic diagram of an extension field provided by an embodiment of the present application;

6 is a schematic diagram of a partial structure of an update message message provided by an embodiment of the present application;

7 is a schematic structural diagram of a network layer reachability information field provided by an embodiment of the present application;

8 is a schematic diagram of a TLV field provided by an embodiment of the present application;

9 is a schematic diagram of another TLV field provided by an embodiment of the present application;

10 is a schematic diagram of another TLV field provided by an embodiment of the present application;

11 is a schematic diagram of an extension field provided by an embodiment of the present application;

12 is a flowchart of a method for obtaining a mapping rule provided by an embodiment of the present application;

13 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

14 is a flowchart of a method for obtaining a mapping rule provided by an embodiment of the present application;

15 is a flowchart of a method for obtaining a mapping rule provided by an embodiment of the present application;

16 is a schematic structural diagram of an apparatus for acquiring mapping rules provided by an embodiment of the present application;

17 is a schematic structural diagram of another apparatus for acquiring mapping rules provided by an embodiment of the present application;

FIG. 18 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 19 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 20 is a schematic structural diagram of another communication device provided by an embodiment of the present application.

Detailed ways

The terms used in the embodiment part of the present application are only used to explain the embodiments of the present application, and are not intended to limit the present application. Embodiments of the present invention will be described below with reference to the accompanying drawings.

In view of the situation that IPv6 networks have been deployed in large numbers and IPv4 networks are isolated from IPv6 networks, in order to ensure the operation of IPv4 services and the development of continuously updated IPv6 services, the mapping between IPv4 addresses and IPv6 addresses has become an effective solution. How to obtain the mapping rules for address mapping is the key to successful address mapping. However, since the efficiency of manually configuring the mapping rules is low and the maintenance cost is high, the embodiments of the present application provide a method for acquiring the mapping rules, which can realize automatic learning of the mapping rules.

Taking the method provided by the embodiment of the present application applied to the communication system shown in FIG. 1 as an example, as shown in FIG. 1 , the communication system includes a first communication device 101 and a second communication device 102 . Wherein, the first communication device 101 and the second communication device 102 are located in the first type of network. The first communication device 101 is configured with a first mapping rule, the second communication device 102 is configured with a second mapping rule, and the first mapping rule is used for the difference between the address in the first type of network and the address in the second type of network. The second mapping rule is used for the address mapping between the addresses in the network of the first type and the addresses in the network of the second type. Exemplarily, the first type of network is an IPv4 network, and the second type of network is an IPv6 network. One of the first mapping rule and the second mapping rule can map the source address between the IPv4 address and the IPv6 address, and the other mapping rule can map the destination address between the IPv4 address and the IPv6 address. For example, the first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the mapping between the second IPv4 address and the second IPv6 address. Therefore, the first communication device 101 needs to learn the first mapping rule on the second communication device 102 , and the second communication device 102 needs to learn the second mapping rule on the first communication device 101 .

Based on the communication system shown in FIG. 1 , taking the communication system as a centralized MAP-T/MAP-E scenario as an example, as shown in FIG. 2 , the first communication device 101 is a MAP border relay (MAP border relay) , MAP BR) device, the second communication device 102 is a broadband remote access server (BRAS); or, the first communication device is a BRAS, and the second communication device is a MAP BR device. In Fig. 2, the MAP BR, as the edge device of the MAP domain, that is, the relay device, is used to connect the IPv4 network and the IPv6 network, and is responsible for IPv4 and IPv6 encapsulation/decapsulation. The BRAS allocates addresses to MAP customer edge (MAP customer edge, MAP CE) devices, and the MAP CE is responsible for encapsulating/decapsulating IPv4 and IPv6, so as to realize the function of IPv4 users accessing the IPv4 network through the IPv6 network. It should be noted that there may be multiple BRASs and MAP BRs, and FIG. 2 only shows one as an example. The sending direction of the message or the learning direction of the mapping rule may be from BRAS to MAP BR, or from MAP BR to BRAS.

In addition to the application scenario shown in FIG. 2 , the method provided by the embodiment of the present application is also applicable to the intercommunication scenario of the IPv4 island in the IPv6 network. As shown in FIG. 3 , the first communication device is a first provider edge (provider edge, PE) device, and the second communication device is a second PE device. By deploying MAP rules on PE devices and advertising each other through the border gateway protocol (BGP), IPv4 islands can communicate with each other across the IPv6 network. There may be more than three PEs, and FIG. 3 only shows three PEs as an example. The sending direction of the message or the learning direction of the mapping rule can be one PE to another PE.

Next, the first mapping rule is configured on the first communication device and the second mapping rule is configured on the second communication device, and the learning of the mapping rule is realized through the interaction process between the first communication device and the second communication device as For example, the method for acquiring the mapping rule provided by the embodiment of the present application will be described. Referring to FIG. 4 , the method for obtaining a mapping rule provided by an embodiment of the present application includes the following processes.

401. The first communication device acquires information of a first mapping rule configured on the first communication device, the first communication device is located in a network of a first type, and the first mapping rule is used for addresses in the network of the first type and addresses of the second type. The address mapping between addresses in the network, the first type of network is different from the second type of network.

This embodiment of the present application does not limit the manner in which the first communication device acquires the first mapping rule configured on the first communication device. For example, after the first mapping rule is manually configured on the first communication device, the first communication device can A mapping rule is stored, and the first mapping rule is stored in the storage space of the first communication device or the storage space of other devices. The first communication device may acquire the first mapping rule configured on the first communication device from the corresponding storage space.

In addition, the embodiment of the present application does not limit the content of the first mapping rule, and only needs to be able to implement the mapping between IPv4 addresses and IPv6 addresses. Since the mapping address and port (MAP) technology maps the IPv4 address encapsulation and decapsulation IPv6 to the IPv6 address through certain rules, the purpose of IPv4 users accessing the IPv4 network through the IPv6 network is realized. In the MAP technology, the same address is multiplexed with an address and a port in a stateless manner. According to the message format, it is divided into double encapsulation MAP-E and double translation MAP-T. MAP-T/MAP-E technology combines stateless and double translation/encapsulation, so there are great advantages in technical performance, reliability and customer's deployment cost. In addition, there are three mapping rules in the MAP technology, which are a basic mapping rule (BMR), a forwarding mapping rule (FMR), and a default mapping rule (DMR). Therefore, in a possible implementation manner, the first mapping rule in this embodiment of the present application includes, but is not limited to, at least one of BMR, FMR, and DMR in . The information of the first mapping rule includes at least one of address information corresponding to the basic mapping rule BMR, address information corresponding to the forwarding mapping rule FMR, and address information corresponding to the default mapping rule DMR.

Further, no matter what kind of mapping rule the first mapping rule is, in the method provided by the embodiment of the present application, the information of the first mapping rule can be represented in the form of routing. In a possible implementation manner, acquiring the information of the first mapping rule configured on the first communication device by the first communication device includes: the first communication device generates a MAP route based on the first mapping rule, and uses the MAP route as the first mapping rule information. Exemplarily, the address information corresponding to the BMR includes, but is not limited to, the IPv6 prefix, the IPv6 prefix length, the IPv4 prefix, the IPv4 prefix length, the EA bit length, and the port set ID (port-set ID, PSID) offset corresponding to the BMR. The address information corresponding to the FMR includes, but is not limited to, the IPv6 prefix corresponding to the FMR, the IPv6 prefix length, the IPv4 prefix, the IPv4 prefix length, the EA bit length, and the PSID offset. The address information corresponding to the DMR includes but is not limited to the IPv6 prefix corresponding to the DMR and the length of the IPv6 prefix. Alternatively, the address information corresponding to the DMR includes but is not limited to the IPv6 address corresponding to the BR device and the IPv6 address prefix length.

402. The first communication device sends a first packet to the second communication device, where the first packet carries information of the first mapping rule, and the second communication device is located in a network of the first type.

In order to enable the second communication device to also learn the first mapping rule configured on the first communication device, the first communication device may send information of the first mapping rule configured on the first communication device to the second communication device. For example, the first communication device sends the information of the first mapping rule to the second communication device by sending a message. In the embodiment of the present application, it is taken as an example that the first communication device sends the first packet to the second communication device by using the first packet to carry the information of the first mapping rule. Before the first communication device sends the first packet to the second communication device, the first communication device and the second communication device first establish a MAP neighbor relationship.

In a possible implementation manner, establishing a MAP neighbor relationship between the first communication device and the second communication device includes: the first communication device sends a packet carrying the first MAP address cluster to the second communication device; the first communication device receives The packet that is sent by the second communication device and carries the second MAP address cluster. Taking the transmission of the MAP address cluster through the BGP Open message as an example, the first communication device and the second communication device may add the MAP address family capability in the BGP Open message, and establish a BGP MAP neighbor after negotiating the MAP capability. Exemplarily, the format of the BGP capability negotiation field is shown in FIG. 5 .

Among them, the extension field is used to indicate the MAP address family under the capabilities advertisement. Then, the first communication device carries the first MAP address cluster under the capabilities advertisement field in the BGP Open packet, and sends the BGP Open packet carrying the first MAP address cluster to the second communication device. The second communication device carries the second MAP address cluster under the capabilities advertisement field in the BGP Open message, and sends the BGP Open message carrying the second MAP address cluster to the first communication device. In this way, after announcing the address cluster, the first communication device establishes a MAP neighbor relationship with the second communication device.

After establishing the MAP neighbor relationship, the first communication device sends a first packet carrying information of the first mapping rule. Exemplarily, the first packet further includes attribute information, where the attribute information includes a MAP domain type and a MAP domain identifier. Optionally, the attribute information further includes a route identifier and a route target. This embodiment of the present application does not limit the manner in which the first packet carries the information of the first mapping rule and attribute information, including but not limited to the following two.

First, the information of the first mapping rule and the attribute information are both carried in the field of the network layer reachability information of the first packet.

This embodiment of the present application does not limit the first packet that carries the information of the first mapping rule. Exemplarily, the first packet is an update (update) packet. As shown in FIG. 6 , the information of the first mapping rule is carried in the network layer reachability information (network layer reachability information, NLRI) field of the update message and transmitted in the form of a BGP route. The NLRI field in the update message packet includes a prefix length (prefix length) field, and after carrying the information of the first mapping rule expressed in the form of a BGP route, the NLRI field is extended. A possible NLRI information can be defined in the format shown in Figure 6, in which, except for the prefix length, other fields are extended fields, and the content of the extended fields is shown in Figure 7, including attribute information, which includes the MAP field. Type (MAP domain type) and MAP domain identification (MAP domain ID). Also included are route distinguishers and route targets, such as virtual private network (VPN) route identifiers and VPN route targets. Wherein, the MAP domain type includes MAP-T or MAP-E. The route identifier is used to identify different routes, for example, the VPN route identifier is used to identify different VPNs. The routing target is used to control the publication of routing information, for example, the VPN routing target is used to control the publication of VPN routing information.

In addition, the data (data) field shown in FIG. 7 carries the information of the first mapping rule in the form of type-length-content (type-length-value, TLV). For example, if the information of the first mapping rule includes address information corresponding to the BMR, the BMR TLV format is as shown in FIG. 8 .

BMR TLV: corresponds to the BMR rule and is used to indicate the address information corresponding to the BMR. Taking the communication system shown in Fig. 2 as an example, on MAP-CE, for carrying out network address translation (network address translation, NAT) 4 and IPv6 translation/encapsulation with IPv4 user message, on MAP-BR, for carrying out IPv4 The address is decapsulated/de-tunneled from the IPv6 message, and the IPv4 address + port (port) of the backhaul traffic is translated and encapsulated in IPv6, and then forwarded to the MAP-CE according to the IPv6 route in the MAP domain. The address information corresponding to the BMR includes: the IPv6 prefix (Rule-IPv6-prefix) corresponding to the BMR rule, the IPv6 prefix length (IPv6 prefix length), the IPv4 prefix (Rule-IPv4-prefix), and the EA bit length (EA-bits-length) , PSID offset (port-set ID-offset), these parameters can be configured on the MAP-CE to calculate the shared IPv4 address and port sequence, as well as the IPv6 address of the MAP-CE to realize the mapping between the IPv4 address and the IPv6 address.

For example, if the information of the first mapping rule includes address information corresponding to the FMR, the FMR TLV format includes the following contents. FMR TLV: corresponds to the FMR rule, the FMR TLV is used to carry the address information corresponding to the FMR, and is used to realize the direct communication of the mutual access traffic between the MAP and CE in the network. It should be noted that the FMR and the BMR can be the same, and the structure of the BMR TLV is shown in FIG. 8 , that is, the BMR can be configured as the FMR.

For example, if the information of the first mapping rule includes address information corresponding to the DMR, the DMR TLV format is as shown in FIG. 9 .

DMR TLV: Corresponds to the DMR in MAP-T. The DMR TLV carries the mapping information corresponding to the DMR, and represents the destination IPv4 address of the packet is an address outside the MAP domain (domain), which is forwarded to the outside of the domain through the BR. The address information corresponding to the DMR contains two parameters, Rule-IPv6-prefix and Rule-IPv4-prefix. The value of Rule-IPv6-prefix is the IPv6 prefix of the MAP BR, and the value of Rule-IPv4-prefix is 0.0.0.0/0, that is, the mapping rule applied as the default route when matching IPv4 routes on the MAP-CE. After this rule is used, the destination IPv6 address will be composed of the DMR-configured Rule-IPv6-prefix+destination IPv4 address to form the destination IPv6 address.

For example, if the information of the first mapping rule includes the address information corresponding to the DMR, and the address information corresponding to the DMR includes the address information corresponding to the BR device, the BR address (address) TLV format is as shown in FIG. 10 .

BR Address TLV: Corresponding to the DMR in MAP-E, the destination address outside the MAP domain in MAP-E (destinations outside the MAP domain) is the IPv6 address of the configured MAP-BR.

In the second type, the information of the first mapping rule is carried in the network layer reachability information field of the first packet, and the attribute information is carried in the extended attribute field of the first packet.

As shown in Figure 11, the information of the first mapping rule, such as BMR/FMR/DMR/BR address, is carried in the NLRI, and an extended attribute field, such as BGP MAP attribute/community attribute, is added to the update packet at the same time. /extended community) field, the attribute/extended attribute field is used to carry attribute information.

By adopting the first or second method of carrying the information of the first mapping rule and the attribute information, the information and attribute information of the first mapping rule can be carried in the same field or in different fields. , the carrying way is more flexible.

403. The second communication device receives the first packet sent by the first communication device, and acquires the first mapping rule according to the information of the first mapping rule in the first packet.

Before the second communication device receives the first packet sent by the first communication device, the second communication device establishes a MAP neighbor relationship with the first communication device. Therefore, after the second communication device receives the first packet, because the first packet The information of the first mapping rule is carried, so the second communication device can acquire the first mapping rule according to the information of the first mapping rule in the first packet.

Exemplarily, the information of the first mapping rule is a MAP route generated based on the first mapping rule; then the second communication device obtains the first mapping rule according to the information of the first mapping rule, including: the second communication device obtains the first mapping rule according to the MAP route. a mapping rule. Because the second mapping rule is configured on the second communication device, and the second communication device obtains the first mapping rule configured on the first communication device through dynamic learning, the second communication device can realize the source address and destination address between IPv4 and IPv4. Mapping between IPv6.

In a possible implementation manner, when the second communication device is a broadband access server, after acquiring the first mapping rule according to the information of the first mapping rule, the second communication device further includes: the second communication device communicates with the third communication device The device sends a sixth packet, so that the third communication device performs the address mapping between the address in the network of the first type and the address in the network of the second type according to the first mapping rule; wherein, the sixth packet carries the first information of a mapping rule, the third communication device is a user edge CE device.

The method provided by the embodiments of the present application can reduce the configuration and maintenance workload of the mapping rules by dynamically learning the mapping rules on the communication device, thereby improving the efficiency of acquiring the mapping rules and reducing the maintenance cost. For example, through the dynamic learning function of MAP mapping rules, the workload of centralized MAP scene configuration and maintenance can be reduced, thereby improving the efficiency of acquiring mapping rules and reducing maintenance costs. In addition, the method can not only be applied to the intercommunication scenario of IPv4 islands in the IPv6 network, but also realize the intercommunication of IPv4 islands across the IPv6 network.

On the basis that the second communication device shown in FIG. 4 dynamically learns the first mapping rule configured on the first communication device, the method provided by this embodiment of the present application also supports the first communication device to dynamically learn the first mapping rule configured on the second communication device. Two mapping rules. Referring to FIG. 12 , the method provided by this embodiment of the present application includes the following processes.

401. The first communication device acquires information of a first mapping rule configured on the first communication device, the first communication device is located in a network of a first type, and the first mapping rule is used for addresses in the network of the first type and addresses of the second type. The address mapping between addresses in the network, the first type of network is different from the second type of network.

402. The first communication device sends a first packet to the second communication device, where the first packet carries information of the first mapping rule, and the second communication device is located in a network of the first type.

403. The second communication device receives the first packet sent by the first communication device, and acquires the first mapping rule according to the information of the first mapping rule in the first packet.

It should be noted that, for the implementation manner of the above-mentioned 401-403, reference may be made to the relevant description of the above-mentioned 401-403 in FIG. 4, which will not be repeated here.

404. The second communication device sends a second packet to the first communication device, where the second packet carries information of the second mapping rule configured on the second communication device, and the second mapping rule is used for the address in the first type of network Address mapping with addresses in the second type of network.

Before the second communication device sends the second packet to the first communication device, the second communication device obtains the mapping rule configured on the second communication device, and further obtains information of the second mapping rule. This embodiment of the present application does not limit the manner in which the second communication device obtains the second mapping rule configured on the second communication device. For example, after manually configuring the second mapping rule on the second communication device, the second communication device can The second mapping rule is stored, and the second mapping rule is stored in the storage space of the second communication device or the storage space of other devices. The second communication device may acquire the second mapping rule configured on the second communication device from the corresponding storage space.

In addition, the embodiment of the present application does not limit the content of the second mapping rule, and only needs to be able to implement the mapping between IPv4 addresses and IPv6 addresses. In a possible implementation manner, the second mapping rule in this embodiment of the present application includes, but is not limited to, at least one of BMR, FMR, and DMR in . The information of the second mapping rule includes at least one of address information corresponding to the basic mapping rule BMR, address information corresponding to the forwarding mapping rule FMR, and address information corresponding to the default mapping rule DMR.

Further, no matter what kind of mapping rule the second mapping rule is, in the method provided by the embodiment of the present application, the information of the second mapping rule can be represented in the form of routing. In a possible implementation manner, acquiring the information of the second mapping rule configured on the second communication device by the second communication device includes: the second communication device generates a MAP route based on the second mapping rule, and uses the MAP route as the second mapping rule information. Exemplarily, the address information corresponding to the BMR includes, but is not limited to, the IPv6 prefix, the IPv6 prefix length, the IPv4 prefix, the IPv4 prefix length, the EA bit length, and the port set ID (port-set ID, PSID) offset corresponding to the BMR. The address information corresponding to the FMR includes, but is not limited to, the IPv6 prefix corresponding to the FMR, the IPv6 prefix length, the IPv4 prefix, the IPv4 prefix length, the EA bit length, and the PSID offset. The address information corresponding to the DMR includes but is not limited to the IPv6 prefix corresponding to the DMR and the length of the IPv6 prefix. Alternatively, the address information corresponding to the DMR includes but is not limited to the IPv6 address corresponding to the BR device and the IPv6 address prefix length.

In order for the first communication device to also learn the second mapping rule configured on the second communication device, the second communication device may send information of the second mapping rule configured on the second communication device to the first communication device. For example, the second communication device sends the information of the second mapping rule to the first communication device by sending a message. In the embodiment of the present application, the second communication device sends the second packet to the first communication device by using the second packet to carry the information of the second mapping rule as an example. Before the second communication device sends the second packet to the first communication device, the second communication device and the first communication device first establish a MAP neighbor relationship. For the manner of establishing the MAP neighbor relationship, reference may be made to the relevant description of 402 in FIG. 4 , which will not be repeated here.

In addition, after establishing the MAP neighbor relationship, the second communication device sends a second packet carrying information of the second mapping rule. Exemplarily, the second packet further includes attribute information, where the attribute information includes a MAP domain type and a MAP domain identifier. Optionally, the attribute information further includes a route identifier and a route target. This embodiment of the present application does not limit the manner in which the second message carries the information of the second mapping rule and attribute information, including but not limited to the following two.

First, the information of the second mapping rule and the attribute information are both carried in the field of the network layer reachability information of the second packet.

In the second type, the information of the second mapping rule is carried in the network layer reachability information field of the second packet, and the attribute information is carried in the extended attribute field of the first packet.

Regarding the manner in which the second packet carries the information of the second mapping rule and the attribute information, reference may be made to the manner in which the first packet carries the information and attribute information of the first mapping rule, which will not be repeated here.

405. The first communication device receives the second packet sent by the second communication device, and acquires the second mapping rule according to the information of the second mapping rule in the second packet.

Before the first communication device receives the second packet sent by the second communication device, the second communication device establishes a MAP neighbor relationship with the first communication device. Therefore, after the first communication device receives the second packet, because the second packet The information of the second mapping rule is carried, so the first communication device can acquire the second mapping rule according to the information of the second mapping rule in the second packet.

Exemplarily, the information of the second mapping rule is a MAP route generated based on the second mapping rule; then the first communication device obtains the second mapping rule according to the information of the second mapping rule, including: the first communication device obtains the first mapping rule according to the MAP route. Two mapping rules. Because the first mapping rule is configured on the first communication device, and the first communication device obtains the second mapping rule configured on the second communication device through dynamic learning, the source address and the destination address can be implemented between IPv4 and IPv6. map.

It should be noted that, whether the first communication device learns the second mapping rule configured on the second communication device or the second communication device learns the first mapping rule configured on the first communication device, the first communication device communicates with the second communication device. After the device has both the first mapping rule and the second mapping rule, the first mapping rule and the second mapping rule can be stored as routing table entries for triggering address mapping during packet transmission.

In addition, the above 401 to 403 are the processes in which the first communication device sends the information of the first mapping rule to the second communication device, so that the second communication device learns the first mapping rule configured on the first communication device, and 404 and 405 are the first mapping rules. The second communication device sends the information of the second mapping rule to the first communication device, so that the first communication device learns the process of the second mapping rule configured on the second communication device. In addition to executing 401-403 first, and then executing 404 and 405, 404 and 405 can also be executed first, and then 401-403. This embodiment of the present application does not limit the sequence of the process for the second communication device to learn the first mapping rule configured on the first communication device and the process for the first communication device to learn the second mapping rule configured on the second communication device.

Further, when both the first communication device and the second communication device dynamically learn the mapping rule of the opposite end through the method provided in the embodiment of the present application, the first communication device and the second communication device can realize the IPv4 network and the IPv6 network. Intercommunication. On this basis, the first communication device and the second communication device can perform message transmission. The process of message transmission can be as follows as shown in Figure 12.

406. The first communication device obtains a seventh packet, where the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address.

The seventh packet is a packet generated by the first communication device, or a packet received by the first communication device from the previous hop, and the embodiment of the present application does not limit the type and content of the seventh packet. Suppose that the first communication device is located in a network of a first type, the network of the first type is an IPv4 network, and the first mapping rule configured on the first communication device is used for the mapping between the first IPv4 address and the first IPv6 address as: For example, the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address. For example, the first IPv4 address is the address of the first communication device, and the second IPv4 address is the address of the second communication device.

407. The first communication device maps the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, and maps the destination address of the seventh packet from the second IPv4 address based on the second mapping rule. is the second IPv6 address, and obtains the third packet.

Since the destination address of the seventh packet is the address of the second communication device, and the first communication device and the second communication device are connected through the IPv6 network, in order to successfully traverse the IPv6 network through the IPv4 network, the first communication device does not directly forward For the seventh packet, first map the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, and map the destination address of the seventh packet from the second IPv4 address based on the second mapping rule. The address is mapped to the second IPv6 address to obtain the third packet.

408. The first communication device sends a third packet.

When sending the third packet, the first communication device may query the routing table to determine the next hop. After that, the first communication device sends the third packet to the next hop of the first communication device, and forwards the third packet to the destination address according to the normal flow of packet transmission. The source address of the third packet is the first IPv6 address, and the destination address of the third packet is the second IPv6 address. Therefore, the third packet can be successfully sent to the IPv6 network, and then transmitted to the second communication device through the IPv6 network.

409. The second communication device receives the third packet, maps the source address of the third packet from the first IPv6 address to the first IPv4 address based on the first mapping rule, and maps the destination address of the third packet based on the second mapping rule. The second IPv6 address is mapped to the second IPv4 address.

Since the third packet is an IPv6 packet, the source address and destination address are both IPv6 addresses, and the second communication device is located on the second network, that is, the IPv4 network, after receiving the third packet, the second communication device can The first mapping rule maps the source address of the third packet from the first IPv6 address to the first IPv4 address, and the destination address of the third packet is mapped from the second IPv6 address to the second IPv4 address based on the second mapping rule.

The above description only takes the first communication device sending a message to the second communication device as an example. Similarly, the second communication device can also send a message to the first communication device according to the same principle, and the process can be as shown in FIG. 12 . Process as follows.

410. The second communication device obtains a fourth packet, where the source address of the fourth packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address.

The fourth packet is a packet generated by the second communication device, or a packet received by the second communication device from the previous hop, and the embodiment of the present application does not limit the specific type and content of the fourth packet. Taking that the second communication device is located in the second network, the second network is an IPv4 network, and the second mapping rule configured on the second communication device is used for the mapping between the second IPv4 address and the second IPv6 address as an example, the fourth The source address of the packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address. For example, the second IPv4 address is the address of the second communication device, and the first IPv4 address is the address of the first communication device.

411. The second communication device maps the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, and maps the destination address of the fourth packet from the first IPv4 address based on the second mapping rule is the first IPv6 address, and a fifth packet is obtained.

Since the destination address of the fourth packet is the address of the first communication device, and the first communication device and the second communication device are connected through an IPv6 network, the second communication device does not directly send the fourth packet. Successfully traversing the IPv6 network, the second communication device maps the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, and maps the destination address of the fourth packet to the second IPv6 address based on the second mapping rule. The IPv4 address is mapped to the first IPv6 address, and a fifth packet is obtained.

412. The second communication device sends a fifth packet.

When sending the fifth packet, the second communication device may query the routing table to determine the next hop. After that, the second communication device sends the fifth packet to the next hop of the second communication device, and forwards the fifth packet to the destination address according to the normal flow of packet transmission. The source address of the fifth packet is the second IPv6 address, and the destination address of the fifth packet is the first IPv6 address. Therefore, the fifth packet can be successfully sent to the IPv6 network, and then transmitted to the first communication device through the IPv6 network.

413. The first communication device receives the fifth packet, maps the source address of the fifth packet from the second IPv6 address to the second IPv4 address based on the second mapping rule, and maps the destination address of the fifth packet based on the first mapping rule. The first IPv6 address is mapped to the first IPv4 address.

Since the fifth packet is an IPv6 packet, the source address and destination address are both IPv6 addresses, and the first communication device is located on the first network, that is, the IPv4 network, after receiving the fifth packet, the first communication device can The second mapping rule maps the source address of the fifth packet from the second IPv6 address to the second IPv4 address, and maps the destination address of the fifth packet from the first IPv6 address to the first IPv4 address based on the first mapping rule.

The method provided by the embodiments of the present application can reduce the configuration and maintenance workload of the mapping rules by dynamically learning the mapping rules on the communication device, thereby improving the efficiency of acquiring the mapping rules and reducing the maintenance cost.

The methods provided in the embodiments of the present application can be applied to MAP-T/MAP-E scenarios. For example, by using the dynamic learning function of MAP mapping rules, the workload of configuring and maintaining centralized MAP scenarios can be reduced, thereby improving the efficiency of acquiring mapping rules. and reduce maintenance costs. In addition, the method can also be applied to the intercommunication scenario of the IPv4 island in the IPv6 network, so as to realize the intercommunication between the IPv4 island and the IPv6 network. For ease of understanding, the method for obtaining a mapping rule provided by the embodiment of the present application is illustrated by taking the MAP scenario as an example.

Referring to FIG. 13 , based on the centralized MAP-T/MAP-E scenario shown in FIG. 2 , in FIG. 13 , the first communication device is a BRAS, the second communication device is a MAP BR device, and the BRAS and MAP BR devices are located in the IPv6 network For example, in Fig. 13, the MAP BR acts as an edge device of the MAP domain, that is, a relay device, is used to connect the IPv4 network and the IPv6 network, and is responsible for IPv4 and IPv6 encapsulation/decapsulation. The BRAS allocates addresses to the MAP CE. For example, the BRAS delivers the MAP address clusters 1.1.1.0/24 and 2001:db8:1::/48 to the MAP CE, where 1.1.1.0/24 is the IPv4 address (that is, the first IPv4 address). address), 2001:db8:1::/48 is an IPv6 address (ie, the first IPv6 address). MAP CE is responsible for encapsulation/decapsulation of IPv4 and IPv6, so that IPv4 users can access IPv4 network through IPv6 network. In addition, the MAP BR side also has two address clusters of the IPv4 address 11.1.1.0/24 (that is, the second IPv4 address) and the IPv6 address 2001:db8:2::/48 (that is, the second IPv6 address).

In addition, the BRAS establishes a MAP neighbor relationship with the MAP BR. Based on the communication system shown in FIG. 13 , and referring to FIG. 14 , the method provided by the embodiment of the present application includes the following processes.

1401. The BRAS obtains information of a first mapping rule configured on the BRAS, where the first mapping rule is used for address mapping between addresses of the IPv6 network and addresses of the IPv4 network.

This embodiment of the present application does not limit the manner in which the BRAS obtains the first mapping rule configured on the BRAS. For example, after the first mapping rule is manually configured on the BRAS, the BRAS can store the first mapping rule and store the first mapping rule. In the storage space of the BRAS or the storage space of other devices. The BRAS may acquire the first mapping rule configured on the BRAS from the corresponding storage space.

In addition, the embodiment of the present application does not limit the content of the first mapping rule, and only needs to be able to implement the mapping between IPv4 addresses and IPv6 addresses. In a possible implementation manner, the first mapping rule in this embodiment of the present application includes, but is not limited to, at least one of BMR, FMR, and DMR in . The information of the first mapping rule includes at least one of address information corresponding to the basic mapping rule BMR, address information corresponding to the forwarding mapping rule FMR, and address information corresponding to the default mapping rule DMR.

For the implementation of the 1401, reference may be made to the related description of the 401 shown in FIG. 4, and details are not repeated here.

1402, the BRAS sends a first packet to the MAP-BR, where the first packet carries the information of the first mapping rule.

This embodiment of the present application does not limit the first packet that carries the information of the first mapping rule. Exemplarily, the first packet is an update (update) packet. For an implementation manner of the 1402, reference may be made to the relevant description of the 402 shown in FIG. 4, which will not be repeated here.

1403. The MAP-BR receives the first packet sent by the BRAS, and acquires the first mapping rule according to the information of the first mapping rule in the first packet.

For an implementation manner of the 1403, reference may be made to the relevant description of the 403 shown in FIG. 4, and details are not repeated here.

1404, the MAP-BR sends a second packet to the BRAS, where the second packet carries the information of the second mapping rule configured on the MAP-BR, and the second mapping rule is used for the address between the address of the IPv4 network and the address of the IPv6 network map.

For the implementation of the 1404, reference may be made to the relevant description of the 404 shown in FIG. 12, and details are not repeated here.

1405. The BRAS receives the second packet sent by the MAP-BR, and acquires the second mapping rule according to the information of the second mapping rule in the second packet.

For an implementation manner of the 1405, reference may be made to the relevant description of the 405 shown in FIG. 12, which will not be repeated here.

1406, the BRAS sends a sixth packet to the MAP CE, where the sixth packet carries the information of the second mapping rule.

After acquiring the second mapping rule, the BRAS carries the information of the second mapping rule in a sixth packet and sends it to the MAP CE, so that the MAP CE can execute the address in the network of the first type according to the information of the second mapping rule Address mapping with addresses in the second type of network.

1407. The MAP CE obtains a seventh packet, where the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address.

The seventh packet is a packet generated by the MAP CE, or a packet received by the MAP CE from the previous hop, and the embodiment of the present application does not limit the type and content of the seventh packet. With reference to the communication system shown in FIG. 13 , the first IPv4 address is 1.1.1.0/24, the first IPv6 address is 2001:db8:1::/48, the second IPv4 address is 11.1.1.0/24, and the second IPv6 address is 11.1.1.0/24. The address is 2001:db8:2::/48. Therefore, the source address of the seventh packet is 1.1.1.0/24, and the destination address of the seventh packet is 11.1.1.0/24. For the implementation of the 1407, reference may be made to the relevant description of the 406 shown in FIG. 12, and details are not repeated here.

1408, MAP CE maps the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, and maps the destination address of the seventh packet from the second IPv4 address to the first IPv6 address based on the second mapping rule. The second IPv6 address is obtained, and the third packet is obtained.

With reference to the communication system shown in FIG. 13 , the first IPv4 address is 1.1.1.0/24, the first IPv6 address is 2001:db8:1::/48, the second IPv4 address is 11.1.1.0/24, and the second IPv6 address is 11.1.1.0/24. The address is 2001:db8:2::/48. Therefore, MAPCE maps the source address of the seventh packet from 1.1.1.0/24 to 2001:db8:1::/48 based on the first mapping rule. Based on the second mapping The rule maps the destination address of the seventh packet from 11.1.1.0/24 to 2001:db8:2::/48. In this way, the obtained third packet can be transmitted in the IPv6 network.

It should be noted that, in different network scenarios, the MAP CE processes the packets differently in step 1408. Specifically, in the MAP-T scenario, the MAP CE replaces the first IPv4 address with the first IPv6 address, and replaces the second IPv4 address with the second IPv6 address; and in the MAP-E scenario, the MAP CE is in the first IPv4 address. The first IPv6 address is added to the outer layer of the address, and the second IPv6 address is added to the outer layer of the second IPv4 address.

For an implementation manner of the 1408, reference may be made to the relevant description of the 407 shown in FIG. 12, and details are not repeated here.

1409, the MAP CE sends a third packet.

For the implementation manner of the 1409, reference may be made to the relevant description of the 408 shown in FIG. 12, which will not be repeated here. The MAP CE first sends the third packet to the BRAS, and the BRAS sends the third packet to the MAP BR.

1410, the BRAS sends a third packet.

1411, MAP-BR receives the third packet, maps the source address of the third packet from the first IPv6 address to the first IPv4 address based on the first mapping rule, and maps the destination address of the third packet from the first IPv6 address to the first IPv4 address based on the second mapping rule. The second IPv6 address is mapped to the second IPv4 address.

With reference to the communication system shown in FIG. 13 , the first IPv4 address is 1.1.1.0/24, the first IPv6 address is 2001:db8:1::/48, the second IPv4 address is 11.1.1.0/24, and the second IPv6 address is 11.1.1.0/24. The address is 2001:db8:2::/48. Therefore, after receiving the third packet, MAP-BR maps the source address of the third packet from 2001:db8:1::/48 to 1.1.1.0/24, the destination address of the third packet is mapped from 2001:db8:2::/48 to 11.1.1.0/24 based on the second mapping rule.

It should be noted that, in different network scenarios, the MAP-BR processes the packets differently in the step 1411. Specifically, in the MAP-T scenario, the MAP-BR replaces the first IPv6 address with the first IPv4 address, and replaces the second IPv6 address with the second IPv4 address; and in the MAP-E scenario, the MAP-BR replaces the first IPv6 address with the second IPv4 address. An IPv6 address is deleted and the first IPv4 address of the inner layer is retained, and the second IPv6 address is deleted and the second IPv4 address of the inner layer is retained.

For the implementation manner of the 1411, reference may be made to the related description of the 409 shown in FIG. 12, which will not be repeated here.

With reference to the communication system shown in FIG. 13 , and referring to FIG. 15 , the method provided by the embodiment of the present application includes the following processes.

1501 , the BRAS acquires information of a first mapping rule configured on the BRAS, where the first mapping rule is used for address mapping between addresses of the IPv4 network and addresses of the IPv6 network.

For the implementation manner of the 1501, reference may be made to the related description of the 401 shown in FIG. 4, which will not be repeated here.

1502. The BRAS sends a first packet to the MAP-BR, where the first packet carries the information of the first mapping rule.

For an implementation manner of the 1502, reference may be made to the relevant description of the 402 shown in FIG. 4, which will not be repeated here.

1503. The MAP-BR receives the first packet sent by the BRAS, and acquires the first mapping rule according to the information of the first mapping rule in the first packet.

For an implementation manner of the 1503, reference may be made to the relevant description of the 403 shown in FIG. 4, which will not be repeated here.

1504, the MAP-BR sends a second packet to the BRAS, where the second packet carries the information of the second mapping rule configured on the MAP-BR, and the second mapping rule is used for the address between the address of the IPv4 network and the address of the IPv6 network map.

For an implementation manner of the 1504, reference may be made to the related description of the 404 shown in FIG. 12, which will not be repeated here.

1505. The BRAS receives the second packet sent by the MAP-BR, and acquires the second mapping rule according to the information of the second mapping rule in the second packet.

For an implementation manner of the 1505, reference may be made to the related description of the 405 shown in FIG. 12, which will not be repeated here.

In a possible implementation manner, the BRAS sends a sixth packet to the MAP CE, where the sixth packet carries the information of the second mapping rule, so that the MAP CE can perform the first type of network operation according to the second mapping rule Address mapping between addresses in the second type of networks and addresses in the second type of network.

1506. The MAP-BR obtains a fourth packet, where the source address of the fourth packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address.

With reference to the communication system shown in FIG. 13 , the first IPv4 address is 1.1.1.0/24, the first IPv6 address is 2001:db8:1::/48, the second IPv4 address is 11.1.1.0/24, and the second IPv6 address is 11.1.1.0/24. The address is 2001:db8:2::/48. Therefore, the source address of the fourth packet is 11.1.1.0/24, and the destination address of the fourth packet is 1.1.1.0/24. For the implementation manner of the 1506, reference may be made to the related description of the 410 shown in FIG. 12, which will not be repeated here.

1507, MAP-BR maps the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, and maps the destination address of the fourth packet from the first IPv4 address to the second IPv6 address based on the second mapping rule. The first IPv6 address is obtained, and the fifth packet is obtained.

With reference to the communication system shown in FIG. 13 , the first IPv4 address is 1.1.1.0/24, the first IPv6 address is 2001:db8:1::/48, the second IPv4 address is 11.1.1.0/24, and the second IPv6 address is 11.1.1.0/24. The address is 2001:db8:2::/48. Therefore, MAP-BR maps the source address of the fourth packet from 11.1.1.0/24 to 2001:db8:2::/48 based on the first mapping rule. The second mapping rule maps the destination address of the fourth packet from 1.1.1.0/24 to 2001:db8:1::/48. In this way, the obtained fifth packet can be transmitted in the IPv6 network.

For an implementation manner of the 1507, reference may be made to the relevant description of the 411 shown in FIG. 12, which will not be repeated here.

1508, the MAP-BR sends the fifth packet.

The source address of the fifth packet is 2001:db8:2::/48, and the destination address of the fifth packet is 2001:db8:1::/48. For the implementation manner of the 1508, reference may be made to the relevant description of the 412 shown in FIG. 12, which will not be repeated here.

1509, the BRAS receives the fifth packet, and sends the fifth packet to the MAP CE.

1510, the MAP CE receives the fifth packet, maps the source address of the fifth packet from the second IPv6 address to the second IPv4 address based on the second mapping rule, and maps the destination address of the fifth packet from the second IPv4 address to the second IPv4 address based on the first mapping rule. An IPv6 address is mapped to the first IPv4 address.

With reference to the communication system shown in FIG. 13 , the first IPv4 address is 1.1.1.0/24, the first IPv6 address is 2001:db8:1::/48, the second IPv4 address is 11.1.1.0/24, and the second IPv6 address is 11.1.1.0/24. The address is 2001:db8:2::/48. Therefore, MAPCE maps the source address of the fifth packet from 2001:db8:2::/48 to 11.1.1.0/24 based on the second mapping rule. Based on the first mapping The rule maps the destination address of the fifth packet from 2001:db8:1::/48 to 1.1.1.0/24.

For the implementation manner of the 1510, reference may be made to the relevant description of the 413 shown in FIG. 12, which will not be repeated here.

The method for acquiring a mapping rule provided by the embodiment of the present application has been described above. Corresponding to the above method, the embodiment of the present application further provides an apparatus for acquiring a mapping rule. FIG. 16 is a schematic structural diagram of an apparatus for obtaining a mapping rule provided by an embodiment of the present application, where the apparatus is applied to a first communication device, and the first communication device is any of the above-mentioned FIGS. 4 , 12 , 14 , and 15 The first communication device shown in the accompanying drawings. Based on the following multiple modules shown in FIG. 16 , the apparatus for acquiring mapping rules shown in FIG. 16 can perform all or part of the operations performed by the first communication device. It should be understood that the apparatus may include more additional modules than the shown modules or omit a part of the modules shown therein, which is not limited in this embodiment of the present application. As shown in Figure 16, the device includes:

The first receiving module 1601 is configured to receive a first packet sent by a second communication device. The first communication device and the second communication device are located in the first type of network, and the first packet carries the first packet configured on the second communication device. Information on the mapping rule, the first mapping rule is used for address mapping between addresses in the first type of network and addresses in the second type of network, and the first type of network is different from the second type of network;

The first obtaining module 1602 is configured to obtain the first mapping rule according to the information of the first mapping rule.

In a possible implementation manner, the information of the first mapping rule is a mapping address and a port MAP route generated based on the first mapping rule.

In a possible implementation, the device further includes:

An establishing module is configured to establish a MAP neighbor relationship with the second communication device.

In a possible implementation manner, the establishment module is configured to send a message carrying the first MAP address cluster to the second communication device; and receive a message carrying the second MAP address cluster sent by the second communication device.

In a possible implementation manner, the first packet further includes attribute information, where the attribute information includes a mapping address, a port MAP field type, and a MAP field identifier.

In a possible implementation manner, the attribute information further includes a route identifier and a route target.

In a possible implementation manner, the information of the first mapping rule and the attribute information are both carried in the field of the network layer reachability information NLRI of the first packet.

In a possible implementation manner, the information of the first mapping rule is carried in the network layer reachability information field of the first packet, and the attribute information is carried in the extended attribute field of the first packet.

In a possible implementation manner, the information of the mapping rule includes at least one of address information corresponding to the basic mapping rule BMR, address information corresponding to the forwarding mapping rule FMR, and address information corresponding to the default mapping rule DMR.

In a possible implementation manner, the address information corresponding to the BMR includes an Internet Protocol version 6 IPv6 prefix corresponding to the BMR, an IPv6 prefix length, an Internet Protocol version 4 IPv4 prefix, an IPv4 prefix length, an EA bit length, and a port set identifier PSID. Offset.

In a possible implementation manner, the address information corresponding to the FMR includes the IPv6 prefix of the Internet Protocol version 6 corresponding to the FMR, the IPv6 prefix length, the IPv4 prefix of the Internet Protocol version 4, the IPv4 prefix length, the EA bit length, and the port set identifier PSID. Offset.

In a possible implementation manner, the address information corresponding to the DMR includes an IPv6 prefix corresponding to the Internet Protocol Version 6 and an IPv6 prefix length corresponding to the DMR.

In a possible implementation manner, the address information corresponding to the DMR includes the IPv6 address of the Internet Protocol version 6 and the IPv6 address prefix length corresponding to the border relay BR device.

In a possible implementation, the device further includes:

The first sending module is configured to send a second message to the second communication device, where the second message carries the information of the second mapping rule configured on the first communication device, and the second mapping rule is used for Address mapping between addresses and addresses in the second type of network, and the information of the second mapping rule is used by the second communication device to obtain the second mapping rule.

In a possible implementation manner, the first type of network is an Internet Protocol version 4 IPv4 network, the second type of network is an Internet Protocol version 6 IPv6 network, or the first type of network is an Internet Protocol version 6 network IPv6 network, the second type of network is the Internet Protocol Version 4 IPv4 network;

The first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the mapping between the second IPv4 address and the second IPv6 address.

In a possible implementation manner, the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server;

Or, the first communication device is a broadband access server, and the second communication device is a MAP BR device;

Alternatively, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device.

In a possible implementation, the device further includes:

A second receiving module, configured to receive a third packet, where the source address of the third packet is the first IPv6 address, and the destination address of the third packet is the second IPv6 address;

The first mapping module is configured to map the source address of the third packet from the first IPv6 address to the first IPv4 address based on the first mapping rule, and map the destination address of the third packet from the second IPv6 address based on the second mapping rule. Mapped to the second IPv4 address.

In a possible implementation, the device further includes:

A second obtaining module, configured to obtain a fourth packet, where the source address of the fourth packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address;

The second mapping module is configured to map the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, and map the destination address of the fourth packet from the first IPv4 address based on the second mapping rule Mapping to the first IPv6 address to obtain the fifth packet;

The second sending module is used for sending the fifth message.

In a possible implementation, the device further includes:

The storage module is used for storing the first mapping rule as a routing table entry, and the routing table entry is used for transmitting the message.

In a possible implementation manner, when the first communication device is a broadband access server, the apparatus further includes: a third sending module, configured to send a sixth packet to the third communication device, so that the third communication device Execute address mapping between addresses in the network of the first type and addresses in the network of the second type according to the first mapping rule; wherein, the sixth packet carries the information of the first mapping rule, and the third communication device is the user edge CE equipment.

FIG. 17 is a schematic structural diagram of an apparatus for obtaining a mapping rule provided by an embodiment of the present application. The apparatus is applied to a first communication device, and the first communication device is any of the above-mentioned FIGS. 4 , 12 , 14 , and 15 The first communication device shown in the accompanying drawings. Based on the following multiple modules shown in FIG. 17 , the apparatus for acquiring mapping rules shown in FIG. 17 can perform all or part of the operations performed by the first communication device. It should be understood that the apparatus may include more additional modules than the shown modules or omit a part of the modules shown therein, which is not limited in this embodiment of the present application. As shown in Figure 17, the device includes:

The first obtaining module 1701 is configured to obtain the information of the first mapping rule configured on the first communication device, and the first mapping rule is used for the address between the address in the network of the first type and the address in the network of the second type map;

The first sending module 1702 is configured to send a first packet to the second communication device, where the first packet carries information of the first mapping rule, and the information of the first mapping rule is used by the second communication device to obtain the first mapping rule, and the first packet carries information of the first mapping rule. A communication device and a second communication device are located on a first type of network, the first type of network being different from the second type of network.

In a possible implementation manner, the first obtaining module 1701 is configured to generate a mapping address and a port MAP route based on the first mapping rule, and use the MAP route as the information of the first mapping rule.

In a possible implementation, the device further includes:

The first receiving module is configured to receive a second packet sent by the second communication device, where the second packet carries information of the second mapping rule configured on the second communication device, and the second mapping rule is used in the first type of network address mapping between addresses in the second type of networks and addresses in networks of the second type;

The second obtaining module is configured to obtain the second mapping rule according to the information of the second mapping rule.

In a possible implementation manner, the first type of network is an Internet Protocol version 4 IPv4 network, the second type of network is an Internet Protocol version 6 IPv6 network, or the first type of network is an Internet Protocol version 6 network IPv6 network, the second type of network is the Internet Protocol version 4 IPv4 network; the first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the second IPv4 address and the second Mapping between IPv6 addresses.

In a possible implementation manner, the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server;

Or, the first communication device is a broadband access server, and the second communication device is a MAP BR device;

Alternatively, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device.

In a possible implementation, the device further includes:

a third obtaining module, configured to obtain a seventh packet, where the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address;

The first mapping module is configured to map the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, and map the destination address of the seventh packet from the second IPv4 address based on the second mapping rule. Mapping to the second IPv6 address to obtain the third packet;

The second sending module is used for sending the third message.

In a possible implementation, the device further includes:

A second receiving module, configured to receive a fifth packet, where the source address of the fifth packet is the second IPv6 address, and the destination address of the fifth packet is the first IPv6 address;

The second mapping module is configured to map the source address of the fifth packet from the second IPv6 address to the second IPv4 address based on the second mapping rule, and map the destination address of the fifth packet from the first IPv6 address based on the first mapping rule Mapped to the first IPv4 address.

It should be understood that when the devices provided in the above Figures 16 to 17 realize their functions, only the division of the above-mentioned functional modules is used for illustration. In practical applications, the above-mentioned functions can be allocated as required. Different functional modules are completed. , that is, dividing the internal structure of the device into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

The specific hardware structure of the communication device in the above-mentioned embodiment is as shown in FIG. The transceiver 1801 , the processor 1802 and the memory 1803 are connected through a bus 1804 . The transceiver 1801 is used to receive and send messages, the memory 1803 is used to store instructions or program codes, and the processor 1802 is used to call the instructions or program codes in the memory 1803 to cause the communication device to execute the communication device in the above method embodiments. related processing steps. In a specific embodiment, the communication device 1800 in this embodiment of the present application may correspond to the first communication device in each of the above method embodiments, and the processor 1802 in the communication device 1800 reads the instructions or program codes in the memory 1803, so that the The communication device 1800 shown at 18 is capable of performing all or part of the operations performed by the first communication device.

In a specific embodiment, the communication device 1800 in this embodiment of the present application may correspond to the second communication device in each of the above method embodiments, and the processor 1802 in the communication device 1800 reads the instructions or program codes in the memory 1803, so that the The communication device 1800 shown at 18 is capable of performing all or part of the operations performed by the second communication device.

The communication device 1800 may also correspond to the apparatuses shown in FIG. 16 and FIG. 17 . For example, the first receiving module 1601 involved in FIG. 16 corresponds to the transceiver 1801 , and the first obtaining module 1602 corresponds to the processor 1802 . For another example, the first sending module 1702 involved in FIG. 17 is equivalent to the transceiver 1801 , and the first acquiring module 1701 is equivalent to the processor 1502 .

Referring to FIG. 19, FIG. 19 shows a schematic structural diagram of a communication device 2000 provided by an exemplary embodiment of the present application. The communication device 2000 shown in FIG. 19 is configured to perform the operations involved in the method for acquiring a mapping rule shown in any of the above-mentioned FIGS. 4 , 12 , 14 , and 15 . The communication device 2000 is, for example, a switch, a router, or the like.

As shown in FIG. 19 , the communication device 2000 includes at least one processor 2001 , memory 2003 and at least one communication interface 2004 .

The processor 2001 is, for example, a general-purpose central processing unit (CPU), a digital signal processor (DSP), a network processor (NP), a graphics processor (Graphics Processing Unit, GPU), A neural-network processing unit (NPU), a data processing unit (DPU), a microprocessor or one or more integrated circuits for implementing the solution of the present application. For example, the processor 2001 includes an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The PLD is, for example, a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. It can implement or execute various logical blocks, modules and circuits described in connection with the disclosure of the embodiments of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

Optionally, the communication device 2000 further includes a bus. The bus is used to transfer information between the various components of the communication device 2000 . The bus may be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (extended industry standard architecture, EISA for short) bus, or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of presentation, only one thick line is shown in FIG. 19, but it does not mean that there is only one bus or one type of bus. In addition to the bus connection, the components of the communication device 2000 in FIG. 19 may be connected in other ways, and the embodiment of the present application does not limit the connection ways of the components.

The memory 2003 is, for example, a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, or a random access memory (RAM) or a memory device that can store information and instructions. Other types of dynamic storage devices, such as electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by Any other medium accessed by the computer, but not limited to this. The memory 2003 exists independently, for example, and is connected to the processor 2001 through a bus. The memory 2003 may also be integrated with the processor 2001 .

The communication interface 2004 uses any device such as a transceiver for communicating with other devices or a communication network, which may be Ethernet, a radio access network (RAN), or a wireless local area network (WLAN), or the like. Communication interface 2004 may include a wired communication interface and may also include a wireless communication interface. Specifically, the communication interface 2004 may be an Ethernet (Ethernet) interface, a Fast Ethernet (FE) interface, a Gigabit Ethernet (GE) interface, an Asynchronous Transfer Mode (ATM) interface, a wireless local area network ( wireless local area networks, WLAN) interface, cellular network communication interface or a combination thereof. The Ethernet interface can be an optical interface, an electrical interface or a combination thereof. In this embodiment of the present application, the communication interface 2004 may be used for the communication device 2000 to communicate with other devices.

In a specific implementation, as an embodiment, the processor 2001 may include one or more CPUs, such as CPU0 and CPU1 as shown in FIG. 19 . Each of these processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

In a specific implementation, as an embodiment, the communication device 2000 may include multiple processors, such as the processor 2001 and the processor 2005 as shown in FIG. 19 . Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

In a specific implementation, as an embodiment, the communication device 2000 may further include an output device and an input device. The output device communicates with the processor 2001 and can display information in a variety of ways. For example, the output device may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, a projector, or the like. The input device communicates with the processor 2001 and can receive user input in various ways. For example, the input device may be a mouse, a keyboard, a touch screen device, or a sensor device, or the like.

In some embodiments, the memory 2003 is used to store the program code 2010 for executing the solutions of the present application, and the processor 2001 can execute the program code 2010 stored in the memory 2003 . That is, the communication device 2000 can use the processor 2001 and the program code 2010 in the memory 2003 to implement the method for acquiring a mapping rule provided by the method embodiment. One or more software modules may be included in the program code 2010 . Optionally, the processor 2001 itself may also store program codes or instructions for executing the solutions of the present application.

In a specific embodiment, the communication device 2000 in this embodiment of the present application may correspond to the first communication device in each of the above method embodiments, and the processor 2001 in the communication device 2000 reads the program code 2010 or the processor 2001 in the memory 2003 The self-stored program codes or instructions enable the communication device 2000 shown in FIG. 19 to perform all or part of the operations performed by the first communication device.

In a specific embodiment, the communication device 2000 in this embodiment of the present application may correspond to the second communication device in each of the above method embodiments, and the processor 2001 in the communication device 2000 reads the program code 2010 or the processor 2001 in the memory 2003 The self-stored program codes or instructions enable the communication device 2000 shown in FIG. 19 to perform all or part of the operations performed by the second communication device.

The communication device 2000 may also correspond to the apparatuses shown in FIG. 16 and FIG. 17 , and each functional module in the apparatuses shown in FIG. 16 and FIG. 17 is implemented by software of the communication apparatus 2000 . In other words, the functional modules included in the apparatuses shown in FIG. 16 and FIG. 17 are generated after the processor 2001 of the communication device 2000 reads the program code 2010 stored in the memory 2003 . For example, the first receiving module 1601 involved in FIG. 16 is equivalent to the communication interface 2004 , and the first acquiring module 1602 is equivalent to the processor 2001 and/or the processor 2005 . For another example, the first sending module 1702 involved in FIG. 17 is equivalent to the communication interface 2004 , and the first acquiring module 1701 is equivalent to the processor 2001 and/or the processor 2005 .

4 , 12 , 14 , and 15 , each step of the method for obtaining a mapping rule is completed by an integrated logic circuit of hardware or an instruction in the form of software in the processor of the communication device 2000 . The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware, which will not be described in detail here to avoid repetition.

Referring to FIG. 20 , FIG. 20 shows a schematic structural diagram of a communication device 2100 provided by another exemplary embodiment of the present application. The communication device 2100 shown in FIG. 20 is used to perform the above-mentioned operations shown in FIG. 4 , FIG. 12 , FIG. 14 , and FIG. 15 . All or part of the operations involved in the method of getting the mapping rules. The communication device 2100 is, for example, a switch, a router, etc., and the communication device 2100 can be implemented by a general bus architecture.

As shown in FIG. 20 , the communication device 2100 includes: a main control board 2110 and an interface board 2130 .

The main control board is also called the main processing unit (MPU) or the route processor card (route processor card). Equipment maintenance, protocol processing functions. The main control board 2110 includes: a central processing unit 2111 and a memory 2112 .

The interface board 2130 is also referred to as a line processing unit (LPU), a line card (linecard) or a service board. The interface board 2130 is used to provide various service interfaces and realize data packet forwarding. The service interface includes, but is not limited to, an Ethernet interface, a POS (Packet over SONET/SDH) interface, etc. The Ethernet interface is, for example, a flexible Ethernet service interface (Flexible Ethernet Clients, FlexE Clients). The interface board 2130 includes: a central processing unit 2131 , a network processor 2132 , a forwarding table entry memory 2134 and a physical interface card (ph10sical interface card, PIC) 2133 .

The central processing unit 2131 on the interface board 2130 is used to control and manage the interface board 2130 and communicate with the central processing unit 2111 on the main control board 2110 .

The network processor 2132 is used to realize the sending process of the message. The form of the network processor 2132 may be a forwarding chip. The forwarding chip may be a network processor (NP). In some embodiments, the forwarding chip may be implemented by an application-specific integrated circuit (ASIC) or a field programmable gate array (FPGA). Specifically, the network processor 2132 is configured to forward the received message based on the forwarding table stored in the forwarding table entry memory 2134. If the destination address of the message is the address of the communication device 2100, the message is sent to the CPU ( Such as processing by the central processing unit 2131); if the destination address of the message is not the address of the communication device 2100, the next hop and outbound interface corresponding to the destination address are found from the forwarding table according to the destination address, and the message is forwarded to The outbound interface corresponding to the destination address. Wherein, the processing of the uplink message may include: processing of the incoming interface of the message, and forwarding table lookup; the processing of the downlink message may include: forwarding table lookup, and so on. In some embodiments, the central processing unit can also perform the function of a forwarding chip, for example, software forwarding is implemented based on a general-purpose CPU, so that a forwarding chip is not required in the interface board.

The physical interface card 2133 is used to realize the interconnection function of the physical layer, the original traffic enters the interface board 2130 through this, and the processed packets are sent from the physical interface card 2133 . The physical interface card 2133 is also called a daughter card, which can be installed on the interface board 2130, and is responsible for converting the photoelectric signal into a message, and after checking the validity of the message, it is forwarded to the network processor 2132 for processing. In some embodiments, the central processing unit 2131 can also perform the functions of the network processor 2132 , such as implementing software forwarding based on a general-purpose CPU, so that the network processor 2132 is not required in the physical interface card 2133 .

Optionally, the communication device 2100 includes multiple interface boards. For example, the communication device 2100 further includes an interface board 2140 . The interface board 2140 includes a central processing unit 2141 , a network processor 2142 , a forwarding table entry storage 2144 and a physical interface card 2143 . The functions and implementation manners of the components in the interface board 2140 are the same as or similar to those of the interface board 2130, and will not be repeated here.

Optionally, the communication device 2100 further includes a switch fabric board 2120 . The switch fabric unit 2120 may also be referred to as a switch fabric unit (switch fabric unit, SFU). In the case that the communication device has multiple interface boards, the switching network board 2120 is used to complete data exchange between the interface boards. For example, the interface board 2130 and the interface board 2140 can communicate through the switch fabric board 2120 .

The main control board 2110 is coupled with the interface board. E.g. The main control board 2110, the interface board 2130, the interface board 2140, and the switching network board 2120 are connected to the system backplane through a system bus to achieve intercommunication. In a possible implementation manner, an inter-process communication (IPC) channel is established between the main control board 2110 and the interface board 2130 and the interface board 2140. communicate through the IPC channel.

Logically, the communication device 2100 includes a control plane and a forwarding plane, the control plane includes a main control board 2110 and a central processing unit 2111, and the forwarding plane includes various components that perform forwarding, such as forwarding entry storage 2134, physical interface card 2133, and network processing device 2132. The control plane performs functions such as routers, generating forwarding tables, processing signaling and protocol packets, and configuring and maintaining the status of communication devices. The control plane issues the generated forwarding tables to the forwarding plane. On the forwarding plane, the network processor 2132 controls the The following forwarding table forwards the packets received by the physical interface card 2133 by looking up the table. The forwarding table issued by the control plane may be stored in the forwarding table entry storage 2134 . In some embodiments, the control plane and forwarding plane may be completely separated and not on the same communication device.

It is worth noting that there may be one or more main control boards, and when there are multiple main control boards, they may include the main main control board and the backup main control board. There may be one or more interface boards. The stronger the data processing capability of the communication device, the more interface boards are provided. There can also be one or more physical interface cards on the interface board. There may be no switch fabric boards, or there may be one or more boards. When there are multiple boards, load sharing and redundancy backup can be implemented together. Under the centralized forwarding architecture, the communication device does not need to switch the network board, and the interface board is responsible for the processing function of the service data of the entire system. Under the distributed forwarding architecture, a communication device may have at least one switching network board, and the switching network board realizes data exchange between multiple interface boards, providing large-capacity data exchange and processing capabilities. Therefore, the data access and processing capabilities of the communication devices of the distributed architecture are greater than those of the communication devices of the centralized architecture. Optionally, the form of the communication device can also be that there is only one board, that is, there is no switching network board, and the functions of the interface board and the main control board are integrated on this board. The central processing unit on the board can be combined into a central processing unit on this board to perform the functions of the two superimposed, the data exchange and processing capacity of this form of communication equipment is low (for example, low-end switches or routers, etc. communication device). The specific architecture used depends on the specific networking deployment scenario, and there is no restriction here.

In a specific embodiment, the communication device 2100 corresponds to the apparatus for obtaining a mapping rule that is applied to the second communication device shown in FIG. 16 . In some embodiments, the first receiving module 1601 shown in FIG. 16 is equivalent to the physical interface card 2133 or the physical interface card 2143 in the communication device 2100 . The first acquisition module 1602 shown in FIG. 16 is equivalent to at least one of the central processor 2111 , the network processor 2132 and the network processor 2142 in the communication device 2100 .

In some embodiments, the communication device 2100 also corresponds to the apparatus for obtaining a mapping rule that is applied to the first communication device shown in FIG. 17 . In some embodiments, the first sending module 1702 shown in FIG. 17 is equivalent to the physical interface card 2133 or the physical interface card 2143 in the communication device 2100 . The first acquisition module 1701 shown in FIG. 17 is equivalent to at least one of the central processor 2111 , the network processor 2132 and the network processor 2142 in the communication device 2100 . Wherein, at least one of the central processor 2111, the network processor 2132, and the network processor 2142 refers to any one of the central processor 2111, the network processor 2132, and the network processor 2142, or any combination thereof.

Based on the communication devices shown in FIG. 18 , FIG. 19 , and FIG. 20 , an embodiment of the present application further provides a communication system, where the communication system includes: a first communication device and a second communication device. Optionally, the first communication device is the communication device 1500 shown in FIG. 18 or the communication device 2000 shown in FIG. 19 or the communication device 2100 shown in FIG. 20 , and the second communication device is the communication device 1500 shown in FIG. 18 or The communication device 2000 shown in FIG. 19 or the communication device 2100 shown in FIG. 20 .

For the methods performed by the first communication device and the second communication device, reference may be made to the related descriptions of the method embodiments for obtaining mapping rules shown in the above-mentioned FIG. 4 , FIG. 12 , FIG. 14 , and FIG.

It should be understood that the above-mentioned processor may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processing, DSP), application specific integrated circuits (application specific integrated circuits, ASIC), field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or any conventional processor or the like. It should be noted that the processor may be a processor supporting an advanced RISC machines (ARM) architecture.

Further, in an optional embodiment, the above-mentioned memory may include read-only memory and random access memory, and provide instructions and data to the processor. The memory may also include non-volatile random access memory. For example, the memory may also store device type information.

The memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available. For example, static RAM (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access Memory (double data date SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (directrambus RAM, DR RAM).

A computer-readable storage medium is also provided, and at least one program instruction or code is stored in the storage medium, and when the program instruction or code is loaded and executed by the processor, the computer realizes the above Figure 4, Figure 12, Figure 14, The method for obtaining a mapping rule shown in any one of FIG. 15 .

The present application provides a computer program. When the computer program is executed by a computer, the processor or the computer can execute the corresponding steps and/or processes in the foregoing method embodiments.

A chip is provided, including a processor for invoking and executing instructions stored in a memory, so that a communication device on which the chip is installed performs the methods in the above-mentioned aspects.

Another chip is provided, including: an input interface, an output interface, a processor, and a memory, the input interface, the output interface, the processor, and the memory are connected through an internal connection path, and the processor is used to execute all The code in the memory, when the code is executed, the processor is configured to perform the methods of the above aspects.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer program instructions, when loaded and executed on a computer, result in whole or in part of the processes or functions described herein. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid StateDisk), among others.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above descriptions are only specific embodiments of the present application, and are not intended to limit the The protection scope, any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present application shall be included within the protection scope of the present application.

Those of ordinary skill in the art can realize that, in combination with the method steps and modules described in the embodiments disclosed herein, they can be implemented in software, hardware, firmware or any combination thereof, in order to clearly illustrate the interoperability of hardware and software Alternatively, the steps and components of each embodiment have been generally described in terms of their functions in the foregoing description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Persons of ordinary skill in the art may use different methods of implementing the described functionality for each particular application, but such implementations should not be considered beyond the scope of this application.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium can be read-only memory, magnetic disk or optical disk, etc.

When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer program instructions. As an example, the methods of the embodiments of the present application may be described in the context of machine-executable instructions, such as included in program modules executed in a device on a target's real or virtual processor. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data structures. In various embodiments, the functionality of the program modules may be combined or divided among the described program modules. Machine-executable instructions for program modules may be executed within local or distributed devices. In a distributed facility, program modules may be located in both local and remote storage media.

Computer program code for implementing the methods of the embodiments of the present application may be written in one or more programming languages. Such computer program code may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing apparatus such that the program code, when executed by the computer or other programmable data processing apparatus, causes the flowchart and/or block diagrams The functions/operations specified in are implemented. The program code may execute entirely on the computer, partly on the computer, as a stand-alone software package, partly on the computer and partly on a remote computer or entirely on the remote computer or server.

In the context of embodiments of the present application, computer program code or related data may be carried by any suitable carrier to enable a device, apparatus or processor to perform the various processes and operations described above. Examples of carriers include signals, computer-readable media, and the like.

Examples of signals may include electrical, optical, radio, acoustic, or other forms of propagated signals, such as carrier waves, infrared signals, and the like.

A machine-readable medium may be any tangible medium that contains or stores a program for or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or devices, or any suitable combination thereof. More detailed examples of machine-readable storage media include electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only Memory (EPROM or flash memory), optical storage devices, magnetic storage devices, or any suitable combination thereof.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the above-described systems, devices and modules, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components may be combined or Integration into another system, or some features can be ignored, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may also be electrical, mechanical or other forms of connection.

The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solutions of the embodiments of the present application.

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application are essentially or part of contributions to the prior art, or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

In this application, the terms "first", "second" and other words are used to distinguish the same or similar items with basically the same function and function, and it should be understood that between "first", "second" and "nth" There are no logical or timing dependencies, and no restrictions on the number and execution order. It will also be understood that, although the following description uses the terms first, second, etc. to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, a first edge network device may be referred to as a second edge network device, and similarly, a second edge network device may be referred to as a first edge network device, without departing from the scope of various described examples. Both the first edge network and device and the second edge network device may be edge network devices, and in some cases, may be separate and distinct edge network devices.

It should also be understood that, in each embodiment of the present application, the size of the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not be used in the embodiment of the present application. Implementation constitutes any limitation.

In this application, the meaning of the term "at least one" refers to one or more, and the meaning of the term "plurality" in this application refers to two or more. For example, a plurality of second messages refers to two or more more than one second message. The terms "system" and "network" are often used interchangeably herein.

It is to be understood that the terminology used in describing the various described examples herein is for the purpose of describing particular examples and is not intended to be limiting. As used in the description of the various described examples and the appended claims, the singular forms "a", "an")" and "the" are intended to include the plural forms as well, unless the context dictates otherwise. clearly instructed.

It will also be understood that the term "includes" (also referred to as "includes", "including", "comprises" and/or "comprising") when used in this specification designates the presence of stated features, integers, steps, operations, elements , and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groupings thereof.

It should also be understood that the terms "if" and "if" may be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting." Similarly, depending on the context, the phrases "if it is determined..." or "if the [stated condition or event] is detected" can be interpreted to mean "when determining..." or "in response to determining... ” or “on detection of [recited condition or event]” or “in response to detection of [recited condition or event]”.

It should be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

It should also be understood that references throughout the specification to "one embodiment," "an embodiment," and "one possible implementation" mean that a particular feature, structure, or characteristic associated with the embodiment or implementation is included herein. in at least one embodiment of the application. Thus, appearances of "in one embodiment" or "in an embodiment" or "one possible implementation" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

Claims (39)

1. a method for obtaining mapping rules, is characterized in that, described method comprises: A first communication device receives a first packet sent by a second communication device, the first communication device and the second communication device are located on a network of a first type, and the first packet is carried on the second communication device Information about the configured first mapping rule, the first mapping rule is used for address mapping between addresses in the first type of network and addresses in the second type of network, the first type of network and the second type of network is different; The first communication device acquires the first mapping rule according to the information of the first mapping rule. 2 . The method according to claim 1 , wherein the information of the first mapping rule is a mapping address and a port MAP route generated based on the first mapping rule. 3 . 3. The method according to claim 1 or 2, wherein before the first communication device receives the first message sent by the second communication device, the method further comprises: The first communication device establishes a MAP neighbor relationship with the second communication device. 4. The method according to claim 3, wherein establishing a MAP neighbor relationship between the first communication device and the second communication device comprises: sending, by the first communication device, a message carrying the first MAP address cluster to the second communication device; The first communication device receives the packet that is sent by the second communication device and carries the second MAP address cluster. 5 . The method according to claim 1 , wherein the first packet further includes attribute information, and the attribute information includes a MAP field type and a MAP field identifier. 6 . 6. The method of claim 5, wherein the attribute information further comprises a route identifier and a route target. The method according to claim 5 or 6, wherein the information of the first mapping rule and the attribute information are both carried in a field of network layer reachability information NLRI of the first packet . 8. The method according to claim 5 or 6, wherein the information of the first mapping rule is carried in an NLRI field of the first packet, and the attribute information is carried in the first packet in the Extended Attributes field of the text. 9. The method according to any one of claims 1-8, wherein the information of the first mapping rule comprises address information corresponding to a basic mapping rule BMR, address information corresponding to a forwarding mapping rule FMR, and a default mapping rule DMR At least one of the corresponding address information. 10. The method according to claim 9, wherein the address information corresponding to the BMR comprises an Internet Protocol version 6 IPv6 prefix, an IPv6 prefix length, an Internet Protocol version 4 IPv4 prefix, and an IPv4 prefix corresponding to the BMR. Length, EA bit length, and Port Set Identifier PSID Offset. 11. The method according to claim 9 or 10, wherein the address information corresponding to the FMR comprises an IPv6 prefix corresponding to the FMR, an IPv6 prefix length, an IPv4 prefix, an IPv4 prefix length, an EA bit length and a port set Identifies the PSID offset. The method according to any one of claims 9-11, wherein the address information corresponding to the DMR includes an IPv6 prefix and an IPv6 prefix length corresponding to the DMR. The method according to any one of claims 9-11, wherein the address information corresponding to the DMR comprises an IPv6 address and an IPv6 address prefix length corresponding to a border relay BR device. 14. The method according to any one of claims 1-13, wherein the method further comprises: The first communication device sends a second packet to the second communication device, where the second packet carries the information of the second mapping rule configured on the first communication device, and the second mapping rule is used for address mapping between addresses in the network of the first type and addresses in the network of the second type, the information of the second mapping rule is used by the second communication device to obtain the second mapping rule . The method according to any one of claims 1-14, wherein the network of the first type is an IPv4 network, the network of the second type is an IPv6 network, or the network of the first type is an IPv6 network, and the second type of network is an IPv4 network; The first mapping rule is used for the mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for the mapping between the second IPv4 address and the second IPv6 address. 16. The method according to any one of claims 1-15, wherein the first communication device is a MAP BR device, and the second communication device is a broadband access server; Alternatively, the first communication device is a broadband access server, and the second communication device is a MAP BR device; Alternatively, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device. 17. The method according to any one of claims 1-16, wherein after the first communication device acquires the first mapping rule according to the information of the first mapping rule, the method further comprises: the first communication device receives a third packet, the source address of the third packet is the first IPv6 address, and the destination address of the third packet is the second IPv6 address; The first communication device maps the source address of the third packet from the first IPv6 address to the first IPv4 address based on the first mapping rule, and maps the third packet based on the second mapping rule. The destination address of the text is mapped from the second IPv6 address to the second IPv4 address. 18. The method according to any one of claims 1-17, wherein after the first communication device acquires the first mapping rule according to the information of the first mapping rule, the method further comprises: obtaining, by the first communication device, a fourth packet, where the source address of the fourth packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address; The first communication device maps the source address of the fourth packet from the second IPv4 address to the second IPv6 address based on the first mapping rule, and maps the fourth packet based on the second mapping rule. The destination address of the message is mapped to the first IPv6 address by the first IPv4 address, and the fifth message is obtained; The first communication device sends the fifth message. The method according to any one of claims 1-17, wherein when the first communication device is a broadband access server, the first communication device obtains information according to the first mapping rule After the first mapping rule, it also includes: The first communication device sends a sixth packet to the third communication device, so that the third communication device executes the address in the network of the first type and the network of the second type according to the first mapping rule. address mapping between addresses; Wherein, the sixth packet carries the information of the first mapping rule, and the third communication device is a user edge CE device. 20. The method according to any one of claims 1-19, wherein after the first communication device acquires the first mapping rule according to the information of the first mapping rule, the method further comprises: The first communication device stores the first mapping rule as a routing table entry, and the routing table entry is used to transmit a message. 21. A method for obtaining a mapping rule, wherein the method comprises: The first communication device acquires information of a first mapping rule configured on the first communication device, where the first mapping rule is used for an address between an address in a network of the first type and an address in a network of the second type map; The first communication device sends a first packet to the second communication device, where the first packet carries the information of the first mapping rule, and the information of the first mapping rule is used for the second communication device to acquire According to the first mapping rule, the first communication device and the second communication device are located in the first type of network, and the first type of network is different from the second type of network. 22. The method according to claim 21, wherein obtaining, by the first communication device, information of the first mapping rule configured on the first communication device, comprising: The first communication device generates a mapping address and a port MAP route based on the first mapping rule, and uses the MAP route as information of the first mapping rule. 23. The method according to claim 21 or 22, wherein the method further comprises: The first communication device receives a second packet sent by the second communication device, where the second packet carries information about the second mapping rule configured on the second communication device, and the second mapping rule uses an address mapping between addresses in the first type of network and addresses in the second type of network; The first communication device acquires the second mapping rule according to the information of the second mapping rule. 24. The method according to claim 23, wherein the first type of network is an Internet Protocol version 4 IPv4 network, and the second type of network is an Internet Protocol version 6 IPv6 network, or all The network of the first type is an IPv6 network, and the network of the second type is an IPv4 network; the first mapping rule is used for mapping between the first IPv4 address and the first IPv6 address, and the second mapping rule is used for mapping between the first IPv4 address and the first IPv6 address. mapping between the second IPv4 address and the second IPv6 address. 25. The method according to any one of claims 21-24, wherein the first communication device is a MAP border relay BR device, and the second communication device is a broadband access server; Alternatively, the first communication device is a broadband access server, and the second communication device is a MAP BR device; Alternatively, the first communication device is a first service provider edge PE device, and the second communication device is a second PE device. 26. The method according to any one of claims 21-25, wherein after the first communication device generates the second mapping rule according to the information of the second mapping rule, the method further comprises: The first communication device obtains a seventh packet, where the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address; The first communication device maps the source address of the seventh packet from the first IPv4 address to the first IPv6 address based on the first mapping rule, and maps the seventh packet based on the second mapping rule. The destination address of the message is mapped to the second IPv6 address by the second IPv4 address to obtain a third message; The first communication device sends the third message. 27. The method according to any one of claims 21-26, wherein after the first communication device generates the second mapping rule according to the information of the second mapping rule, the method further comprises: The first communication device receives a fifth packet, where the source address of the fifth packet is the second IPv6 address, and the destination address of the fifth packet is the first IPv6 address; The first communication device maps the source address of the fifth packet from the second IPv6 address to a second IPv4 address based on the second mapping rule, and maps the fifth packet based on the first mapping rule. The destination address of the text is mapped from the first IPv6 address to the first IPv4 address. 28. An apparatus for obtaining a mapping rule, wherein the apparatus is applied to a first communication device, comprising: a first receiving module, configured to receive a first packet sent by a second communication device, where the first communication device and the second communication device are located in a network of a first type, and the first packet carries the second communication device Information about the first mapping rule configured on the communication device, the first mapping rule is used for address mapping between addresses in the first type of network and addresses in the second type of network, the first type of The network is different from the network of the second type; A first obtaining module, configured to obtain the first mapping rule according to the information of the first mapping rule. 29. The apparatus of claim 28, wherein the apparatus further comprises: An establishment module, configured to establish a mapping address and port MAP neighbor relationship with the second communication device. 30. The apparatus of claim 28 or 29, wherein the apparatus further comprises: A first sending module, configured to send a second packet to the second communication device, where the second packet carries the information of the second mapping rule configured on the first communication device, and the second mapping rule uses address mapping between addresses in the network of the first type and addresses in the network of the second type, the information of the second mapping rule is used by the second communication device to obtain the second mapping rule. 31. The device according to any one of claims 28-30, wherein the device further comprises: A second receiving module, configured to receive a third packet, where the source address of the third packet is the first IPv6 address, and the destination address of the third packet is the second IPv6 address; A first mapping module, configured to map the source address of the third packet from the first IPv6 address to a first IPv4 address based on the first mapping rule, and map the third packet based on the second mapping rule The destination address of the packet is mapped from the second IPv6 address to the second IPv4 address. 32. The device according to any one of claims 28-31, wherein the device further comprises: A second obtaining module, configured to obtain a fourth packet, where the source address of the fourth packet is the second IPv4 address, and the destination address of the fourth packet is the first IPv4 address; A second mapping module, configured to map the source address of the fourth packet from the second IPv4 address to a second IPv6 address based on the first mapping rule, and map the fourth packet based on the second mapping rule The destination address of the message is mapped to the first IPv6 address by the first IPv4 address, and a fifth message is obtained; The second sending module is configured to send the fifth message. 33. A device for acquiring mapping rules, wherein the device comprises: The first obtaining module is used to obtain the information of the first mapping rule configured on the first communication device, and the first mapping rule is used for the address in the network of the first type and the address in the network of the second type. address mapping between; a first sending module, configured to send a first packet to a second communication device, where the first packet carries information of the first mapping rule, and the information of the first mapping rule is used for the second communication device The first mapping rule is acquired, the first communication device and the second communication device are located in the first type of network, and the first type of network is different from the second type of network. 34. The apparatus of claim 33, wherein the apparatus further comprises: a first receiving module, configured to receive a second packet sent by the second communication device, where the second packet carries information of a second mapping rule configured on the second communication device, the second mapping rule for address mapping between addresses in the first type of network and addresses in the second type of network; A second obtaining module, configured to obtain the second mapping rule according to the information of the second mapping rule. 35. The apparatus of claim 33 or 34, wherein the apparatus further comprises: A third obtaining module, configured to obtain a seventh packet, where the source address of the seventh packet is the first IPv4 address, and the destination address of the seventh packet is the second IPv4 address; A first mapping module, configured to map the source address of the seventh packet from the first IPv4 address to a first IPv6 address based on the first mapping rule, and map the seventh packet based on the second mapping rule The destination address of the message is mapped to the second IPv6 address by the second IPv4 address, to obtain a third message; The second sending module is configured to send the third message. 36. The device according to any one of claims 33-35, wherein the device further comprises: A second receiving module, configured to receive a fifth packet, where the source address of the fifth packet is the second IPv6 address, and the destination address of the fifth packet is the first IPv6 address; a second mapping module, configured to map the source address of the fifth packet from the second IPv6 address to a second IPv4 address based on the second mapping rule, and map the fifth packet based on the first mapping rule The destination address of the packet is mapped from the first IPv6 address to the first IPv4 address. 37. A communication device, characterized in that the communication device comprises: a processor, the processor is coupled to a memory, and the memory stores at least one program instruction or code, the at least one program instruction or code is The processor loads and executes, so that the communication device implements the method for obtaining a mapping rule according to any one of claims 1-27. 38. A system for acquiring mapping rules, characterized in that the system comprises a first communication device and a second communication device, and the first communication device is configured to execute the method described in any one of claims 1-20. A method for acquiring a mapping rule involving a first communication device, the second communication device being configured to execute the method for acquiring a mapping rule involving a second communication device according to any one of claims 21-27. 39. A computer-readable storage medium, characterized in that, at least one program instruction or code is stored in the computer-readable storage medium, and when the program instruction or code is loaded and executed by a processor, the computer realizes the right The method for obtaining a mapping rule described in any one of requirements 1-27.

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