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WO2012006888A1 - Procédé et appareil de mise en oeuvre d'adresse de commande d'accès aux supports virtuels - Google Patents

Procédé et appareil de mise en oeuvre d'adresse de commande d'accès aux supports virtuels Download PDF

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Publication number
WO2012006888A1
WO2012006888A1 PCT/CN2011/073100 CN2011073100W WO2012006888A1 WO 2012006888 A1 WO2012006888 A1 WO 2012006888A1 CN 2011073100 W CN2011073100 W CN 2011073100W WO 2012006888 A1 WO2012006888 A1 WO 2012006888A1
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Prior art keywords
address
vmac
user terminal
mac address
vmac address
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PCT/CN2011/073100
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English (en)
Chinese (zh)
Inventor
刘建基
纪林
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ZTE Corp
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ZTE Corp
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2596—Translation of addresses of the same type other than IP, e.g. translation from MAC to MAC addresses

Definitions

  • the present invention relates to the field of broadband access network technologies in the field of communications, and in particular, to a method and device for implementing a virtual media access control (VMAC) address.
  • VMAC virtual media access control
  • MAC Media Access Control
  • IP address spoofing fraudulent use of MAC addresses or IP addresses, stealing other people's business services and performing denial of service (DoS) attacks.
  • DoS denial of service
  • one method for preventing the above network attack is to use the user's real MAC address.
  • the address is mapped to a new feature with certain user location information according to the set mapping algorithm.
  • the MAC address that is, the VMAC address
  • the MAC address is used to replace the MAC address and the VMAC address of the corresponding packet, and the forwarding of the generated packet after the packet is exchanged between the user side and the network side, so that the packet is forwarded on the network side.
  • the MAC address in the packet received by the network and the management device is a virtual MAC address, which prevents the attacker from using the MAC address for the network attack. From the VMAC address, the related management device can locate the user. location information.
  • an embodiment of the present invention provides a method and apparatus for implementing a virtual media access control address, which is used to provide a method for implementing a virtual media access control address for a protocol packet, and reduce a replacement pair between a MAC address and a VMAC address. The impact of business processing.
  • a method for implementing a virtual media access control VMAC address includes:
  • the access device receives the uplink protocol packet sent by the user terminal, uses the VMAC address to replace the media access control MAC address in the uplink protocol packet, performs service processing according to the uplink protocol generated after the replacement, and sends the service to the network.
  • the side sends the replaced uplink protocol text; and receives the downlink protocol packet sent by the network side, performs service processing according to the received downlink protocol packet, and uses a MAC address corresponding to the VMAC address in the downlink protocol packet. And replacing the VMAC address in the downlink protocol "3 ⁇ 4", and sending the downlink protocol generated after the replacement to the user terminal.
  • the replacing the MAC address in the uplink protocol packet by using the VMAC address specifically: generating a VMAC address by using a preset VMAC address generation policy, and replacing the uplink protocol with the generated VMAC address.
  • MAC address the method also The method includes: the access device stores, according to the VMAC address generated by the user terminal, the replaced MAC address.
  • the generating the VMAC address by using the preset VMAC address generation policy includes: acquiring the attribute information of the user terminal and the partial address information of the MAC address in the uplink protocol, and generating the carried by using the preset VMAC address generation algorithm.
  • the attribute information and a VMAC address of the partial address information include:
  • VMAC addresses generated for a plurality of user terminals having similar attributes are the same.
  • the generated VMAC address carrying the attribute information and the partial address information further carries at least one of the following: port information corresponding to the user terminal; and indicating that the MAC address replaced by the VMAC address is local Information of an address or a general address; information indicating that the MAC address replaced by the VMAC address is a unicast address or a multicast address; ID information assigned to the generated VMAC address.
  • the replacing, by using the VMAC address, the MAC address in the uplink protocol packet, the method includes: querying, according to the MAC address in the uplink protocol, a correspondence between a locally stored MAC address and a VMAC address, and determining the The VMAC address corresponding to the MAC address, and replacing the MAC address with the determined VMAC address.
  • the method further includes: determining that the downlink protocol packet is a non-broadcast packet.
  • the method further includes: when determining that the uplink protocol message indicates that the user terminal terminates the connection with the network side, deleting the stored correspondence between the MAC address of the user terminal and the VMAC address And (or), when it is determined that the downlink protocol indicates that the network side terminates the connection with the user terminal, deleting the stored correspondence between the MAC address of the user terminal and the VMAC address.
  • An apparatus for implementing a virtual media access control address includes:
  • a first receiving unit configured to receive an uplink protocol packet sent by the user terminal
  • a first processing unit configured to replace, by using a virtual media access control VMAC address, a media access control MAC address in the uplink protocol packet, and perform service processing according to the uplink protocol generated after the replacement;
  • a first sending unit configured to send the replaced uplink protocol text to the network side
  • a second receiving unit configured to receive a downlink protocol packet delivered by the network side
  • a second processing unit configured to perform service processing according to the received downlink protocol packet, and replace, by using a MAC address corresponding to the VMAC address in the downlink protocol, a VMAC address in the downlink protocol packet;
  • a second sending unit configured to send, to the user terminal, a downlink protocol generated by the replacement, where the first processing unit is configured to: generate a policy by using a preset VMAC address generation policy.
  • MAC address is further configured to store the VMAC address generated corresponding to the user terminal corresponding to the replaced MAC address.
  • the first processing unit is specifically configured to: obtain the attribute information of the user terminal and the partial address information of the MAC address in the uplink protocol packet, and generate the attribute information and the information that is acquired by using the preset VMAC address generation algorithm. Or determining a VMAC address of the partial address information; or determining a line card of the access device to which the user terminal belongs, and acquiring a VMAC address by using a plurality of VMAC addresses allocated in advance for the determined line card; or
  • the first processing unit generates VMACs for a plurality of user terminals having similar attributes
  • the address is the same.
  • the first processing unit generates the attribute information and the partial address information
  • the VMAC address carries at least one of the following information: port information corresponding to the user terminal; information indicating that the MAC address replaced by the VMAC address is a local address or a universal address; indicating a MAC replaced by the VMAC address
  • the address is a unicast address or a multicast address information; ID information assigned to the generated VMAC address.
  • the first processing unit is specifically configured to replace the MAC address by using the determined VMAC address according to the MAC address in the uplink protocol packet and the VMAC address corresponding to the address.
  • the first processing unit is further configured to: before using the MAC address corresponding to the VMAC address in the downlink protocol, replace the VMAC address in the downlink protocol packet, and determine that the downlink protocol packet is Non-broadcast message.
  • the first processing unit is further configured to: when determining that the uplink protocol packet indicates that the user terminal terminates the connection with the network side, deleting the stored correspondence between the MAC address and the VMAC address of the user terminal; and/or,
  • the second processing unit is further configured to: when determining that the downlink protocol indicates that the network side terminates the connection with the user terminal, deleting the stored correspondence between the MAC address of the user terminal and the VMAC address.
  • the MAC address is replaced by the VMAC address, and then the service is processed according to the replaced uplink protocol packet, that is, the first processing is replaced; for the downlink protocol packet, The service is processed according to the received downlink protocol packet.
  • the downlink protocol packet carries the VMAC address, and then the VMAC address is replaced by the corresponding MAC address, which is processed and replaced.
  • the method of implementing the VMAC address for the protocol packet is as follows: and it can be seen that when the service is processed according to the protocol packet, whether it is for the uplink protocol packet or the downlink protocol packet, The VMAC address, so the service processing layer of the access device does not perceive the replacement between the VMAC address and the MAC address, that is, the impact of address replacement on the service processing is reduced.
  • FIG. 1 is a flowchart of a method for implementing a VMAC address according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for implementing a VMAC address for an uplink protocol packet according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for implementing a VMAC address of a downlink protocol packet according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic structural diagram of an apparatus for implementing a VMAC address according to Embodiment 3 of the present invention. detailed description
  • An embodiment of the present invention provides a method and an apparatus for implementing a VMAC address, in which the VMAC address is implemented for the protocol, and the effect of the replacement between the MAC address and the VMAC address is reduced.
  • the preferred embodiments of the present invention are described in the accompanying drawings, and the preferred embodiments described herein are intended to illustrate and explain the invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
  • the embodiment of the present invention provides a method for implementing a VMAC address. As shown in FIG. 1 , the method includes the following steps: Step 101: The access device receives an uplink protocol packet sent by the user terminal, and uses the VMAC address to the MAC address in the uplink protocol packet. The replacement is performed, and the service is processed according to the uplink protocol generated after the replacement, and the replaced uplink protocol text is sent to the network side.
  • Step 102 The access device receives the downlink protocol packet sent by the network side, performs service processing according to the received downlink protocol packet, and replaces the downlink protocol packet with a MAC address corresponding to the VMAC address in the downlink protocol packet.
  • the VMAC address in the text and sends the downlink protocol packet generated after the replacement to the user terminal.
  • Embodiment 1 of the present invention A method for implementing a VMAC address for an uplink protocol packet is provided in Embodiment 1 of the present invention.
  • the specific process is shown in FIG. 2, and includes:
  • Step 201 The access device receives an uplink packet sent by the user terminal.
  • Step 202 Determine whether the uplink packet is a protocol packet or a data packet. If it is a protocol packet, go to step 203; if it is a data packet, go to step 211.
  • Step 203 Obtain a MAC address from a packet header of an uplink protocol packet, and determine whether a correspondence between the MAC address and the VMAC address exists in the correspondence between the locally stored MAC address and the VMAC address. If not, Go to step 204; otherwise, go to step 205.
  • Step 204 There is no corresponding relationship entry, indicating that the uplink protocol packet is an initial uplink protocol packet sent by the user terminal to the network side.
  • the VMAC address is generated by using a preset VMAC address generation policy. Ways, including predefined mode and address pool mode:
  • the VMAC address generated by the method may carry the attribute information of the user terminal and the partial address information of the MAC address, and may also carry at least one of the following information: port information corresponding to the user terminal, indicating the MAC address
  • the information of the address is a local address or a general address, the information indicating that the MAC address is a unicast address or a multicast address, and the ID information allocated for the generated VMAC address.
  • the VMAC address is specifically generated, the corresponding information is first obtained and used.
  • the preset VMAC address generation algorithm adds the obtained information to the corresponding field of the set address format to generate a corresponding VMAC address.
  • the specific address structure can be as shown in Table 1:
  • Table 1 0-7bit 8-15bit 16-24bit 25-39bit 40bit 41bit 42-47bit
  • the USER-MAC field corresponding to 0-7bit carries the partial address information of the MAC address of the user terminal, for example, the lower 8 bits carrying the MAC address.
  • the port-id field corresponding to the 16-24 bit carries the port information corresponding to the user terminal, and the port information enables the management device on the network side to implement the port corresponding to the user terminal.
  • the VMAC BASE field corresponding to the 25-39 bit and the 42-47 bit may carry the attribute information of the user terminal, for example, the company code of the company to which the user terminal belongs, the device identification number of the user terminal, and the user terminal. Information such as the slot number, the attribute information can enable the management device on the network side to implement the location confirmation of the user terminal, etc.
  • the operation of the 40-bit I/G field carries information indicating whether the MAC address is a unicast address or a multicast address, and the U-L field corresponding to the 41 bit carries the MAC address as a local address or a general address.
  • Information the network side can perform corresponding business processing operations based on these two kinds of information.
  • the foregoing predefined manner may also obtain only the attribute information of the user terminal, and generate a VMAC address by using a preset VMAC address generation algorithm according to the obtained attribute information of the user terminal, and the specific generation process and the format of the VMAC address are not described in detail herein. .
  • This method is to generate a plurality of VMAC addresses in a certain format in advance, and pre-allocate a plurality of VMAC addresses for each line card of the access device from the plurality of VMAC addresses, and generate a MAC address corresponding to the user terminal.
  • the VMAC address is first determined by the line card to which the user terminal belongs, and then the VMAC address is obtained from the VMAC addresses allocated for the line card in advance, and is used as the VMAC address corresponding to the MAC address of the user terminal, for subsequent replacement. .
  • the generated VMAC address may correspond to only one user terminal (referred to as a 1:1 mode); or may correspond to multiple user terminals (referred to as 1:N).
  • the user terminal is a user terminal having a similar attribute.
  • the multiple user terminals belong to the same system, or may be a user terminal belonging to a slot board, or may be a port.
  • the method of using the foregoing address pool may be used to generate an uplink protocol packet of another user terminal having the same attribute information as the user terminal after generating a VMAC address for a user terminal, and corresponding to other user terminals.
  • the VMAC address corresponding to the user terminal is directly used.
  • N mode can save VMAC address resources, and can also improve the efficiency of generating VMAC addresses, thereby improving the processing performance of the entire replacement process between the VMAC address and the MAC address.
  • the corresponding relationship between the MAC address of the user terminal and the generated VMAC address is added in the corresponding relationship between the locally stored MAC address and the VMAC address.
  • the MAC address and the VMAC address information may be carried only in the following 1:N mode, since one VMAC address corresponds to the MAC address of multiple user terminals, in order to distinguish multiple user terminals, the corresponding relationship entry needs to be carried.
  • the feature information of the user terminal the feature information may use various information, and only needs to be able to distinguish the user terminal.
  • the feature information may be a dynamic host configuration protocol (DHCP).
  • DHCP dynamic host configuration protocol
  • the protocol report is recorded.
  • Tag information in the text in the address resolution protocol (ARP, Address Resolution Protocol)
  • ARP Address Resolution Protocol
  • the source IP address information in the protocol packet is recorded.
  • Table 2 The structure of the corresponding correspondence entry can be as shown in Table 2 below:
  • the MAC field carries the MAC address; the VMAC field carries the generated VMAC address; the VLAN field carries the virtual local area network (VLAN) identifier of the user terminal; the IP/SESSION ID field carries the user terminal.
  • Step 205 If there is a corresponding relationship entry, query the correspondence between the locally stored MAC address and the VMAC address according to the MAC address in the uplink protocol packet, and find the correspondence relationship between the MAC address and the VMAC address of the user terminal, and determine The VMAC address corresponding to the MAC address. The MAC address in the protocol packet, and the checksum is recalculated accordingly, and the replaced uplink protocol is generated.
  • Step 207 Perform service processing according to the replaced uplink protocol packet.
  • Step 208 Determine whether the uplink protocol message indicates that the user terminal terminates the connection with the network side. If yes, go to step 209; otherwise, go to step 210.
  • the uplink protocol packet is a PADT (PPPOE Active Discovery Terminate) packet of the pppoE, or whether it is a DHCP DECLINE message of the DHCP and a DECPRELEASE packet.
  • PADT PPOE Active Discovery Terminate
  • Step 209 Delete a correspondence relationship between a MAC address of the user terminal and a VMAC address.
  • Step 210 Send the replaced uplink protocol packet to the network side.
  • Step 211 For the uplink data packet, since the user terminal and the network side have already performed protocol packet exchange before sending the uplink data packet, the corresponding relationship between the MAC address and the VMAC address of the user terminal is already stored locally. In this case, the corresponding relationship entry may be queried, the VMAC address corresponding to the MAC address is determined, and the MAC address in the uplink data packet is replaced by the determined VMAC address. The detailed process is not described in detail herein.
  • Embodiment 2 of the present invention A method for implementing a VMAC address for a downlink protocol packet is provided in Embodiment 2 of the present invention.
  • the specific process is as shown in FIG. 3, and includes:
  • Step 301 The access device receives the downlink packet sent by the network.
  • Step 302 Determine whether the downlink packet is a protocol packet or a data packet. If it is a protocol packet, go to step 303. If it is a data packet, go to step 310.
  • Step 303 Perform service processing according to the downlink protocol packet.
  • Step 304 Determine whether the downlink protocol packet is a broadcast packet. If not, go to step 305. If yes, go to step 307 or step 309.
  • Step 305 Obtain a VMAC address from a packet header of a downlink protocol packet, and query a correspondence between the locally stored MAC address and the VMAC address, and find a correspondence entry between the MAC address and the VMAC address of the user terminal, and determine The MAC address corresponding to the VMAC address; if the VMAC address generated by the above 1:N mode is used, the feature information of the user terminal in the corresponding relationship entry needs to be referred to when determining the corresponding MAC address.
  • Step 306 Replace the VMAC address in the downlink protocol packet with the determined MAC address, and recalculate the checksum accordingly to generate the replaced downlink protocol packet.
  • Step 307 Determine whether the downlink protocol packet indicates that the network side terminates the connection with the user terminal, and if yes, go to step 308; otherwise, go to step 309.
  • the downlink protocol packet is a PPPoE PADT packet of the PPPOE, or It is a DHCP DHCPNK message.
  • Step 308 Delete a correspondence between a MAC address of the user terminal and a VMAC address.
  • Step 309 Send the replaced downlink protocol to the user terminal.
  • Step 310 For the downlink data packet, since the user terminal and the network side have already performed the protocol packet interaction before the downlink data packet is sent, the corresponding relationship between the MAC address and the VMAC address of the user terminal is already stored locally. In this case, the corresponding relationship entry may be queried, the MAC address corresponding to the VMAC address is determined, and the VMAC address in the downlink data packet is replaced by the determined MAC address. The detailed process is not described in detail herein.
  • the VMAC address is carried in the VMAC address. Therefore, the service processing layer of the access device does not sense the replacement between the VMAC address and the MAC address, that is, the impact of the address replacement on the service processing.
  • the information of the user terminal and the like can enable the management device on the network side to implement management operations such as port identification and location determination of the user terminal.
  • the first receiving unit 401 is configured to receive an uplink protocol packet sent by the user terminal, where the first processing unit 402 is configured to replace the MAC address in the uplink protocol packet by using a VMAC address, and generate an uplink protocol according to the replacement. Packet processing for business;
  • the first sending unit 403 is configured to send the replaced uplink protocol message to the network side, where the second receiving unit 404 is configured to receive the downlink protocol packet sent by the network side;
  • the second processing unit 405 is configured to perform service processing according to the received downlink protocol packet, and replace the VMAC address in the downlink protocol packet with a MAC address corresponding to the VMAC address in the downlink protocol packet;
  • the second sending unit 406 is configured to send the downlink protocol generated after the replacement to the user terminal.
  • the first processing unit 402 is configured to generate a VMAC address by using a preset VMAC address generation policy, and replace the MAC address in the uplink protocol packet by using the generated VMAC address; and is also used to correspond to the user terminal.
  • the generated VMAC address is stored corresponding to the replaced MAC address.
  • the first processing unit 402 is configured to obtain the attribute information of the user terminal and the partial address information of the MAC address in the uplink protocol packet, and generate the carried attribute information by using a preset VMAC address generation algorithm. Or the VMAC address of the partial address information; or, determining the line card of the access device to which the user terminal belongs, and obtaining the VMAC address by using a plurality of VMAC addresses allocated in advance for the determined line card; or
  • the first processing unit 402 has the same VMAC address generated for a plurality of user terminals having similar attributes.
  • a message indicating that the MAC address replaced by the VMAC address is a local address or a general address; information indicating that the MAC address replaced by the VMAC address is a unicast address or a multicast address; ID information assigned to the generated VMAC address.
  • the first processing unit 402 is configured to query the correspondence between the locally stored MAC address and the VMAC address according to the MAC address in the uplink protocol packet, and determine the relationship between the MAC address and the VMAC address.
  • the VMAC address corresponding to the MAC address and replaces the MAC address with the determined VMAC address.
  • the first processing unit 402 is further configured to: before using the MAC address corresponding to the VMAC address in the downlink protocol packet, replace the VMAC address in the downlink protocol packet, and determine that the downlink protocol packet is non-broadcast. Message.
  • the first processing unit 402 is further configured to: when determining that the uplink protocol indicates that the user terminal terminates the connection with the network side, deleting the stored correspondence between the MAC address of the user terminal and the VMAC address; and/or ,
  • the second processing unit 405 is further configured to: when determining that the downlink protocol packet indicates that the network side terminates the connection with the user terminal, deleting the stored correspondence between the MAC address of the user terminal and the VMAC address.
  • the solution provided by the embodiment of the present invention includes: the access device receives the uplink protocol packet sent by the user terminal, and replaces the MAC address in the uplink protocol packet by using the VMAC address, and generates the The uplink protocol packet is processed by the service, and the replaced uplink protocol packet is sent to the network side; and the access device receives the downlink protocol packet sent by the network side, and performs service processing according to the received downlink protocol packet. And replacing the VMAC address in the downlink protocol packet with the MAC address corresponding to the VMAC address in the downlink protocol packet, and sending the downlink protocol packet generated after the replacement to the user terminal.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention porte sur un procédé et un appareil de mise en œuvre d'adresse de commande d'accès aux supports virtuels (VMAC). Le procédé comprend les opérations suivantes : un dispositif d'accès reçoit un message de protocole de liaison montante envoyé par un terminal utilisateur, remplace l'adresse de commande d'accès au support (MAC) par l'adresse VMAC dans le message de protocole de liaison montante, effectue le traitement de service conformément au message de protocole de liaison montante qui est généré après remplacement, et envoie le message de protocole de liaison montante remplacé au côté réseau (101) ; et le dispositif d'accès reçoit un message de protocole de liaison descendante envoyé par le côté réseau, effectue le traitement de service conformément au message de protocole de liaison descendante reçu, remplace l'adresse VMAC figurant dans le message de protocole de liaison descendante par l'adresse MAC qui correspond à l'adresse VMAC figurant dans le message de protocole de liaison descendante, et envoie le message de protocole de liaison descendante qui est généré après remplacement au terminal utilisateur (102). Le procédé et l'appareil décrits dans la présente invention fournissent un procédé de mise en œuvre d'adresse VMAC pour les messages de protocole, et réduisent l'effet du remplacement entre l'adresse MAC et l'adresse VMAC sur le traitement de service.
PCT/CN2011/073100 2010-07-15 2011-04-20 Procédé et appareil de mise en oeuvre d'adresse de commande d'accès aux supports virtuels Ceased WO2012006888A1 (fr)

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