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WO2017215390A1 - Procédé et dispositif permettant de sélectionner un port de transfert de données d'un système d'empilement longitudinal - Google Patents

Procédé et dispositif permettant de sélectionner un port de transfert de données d'un système d'empilement longitudinal Download PDF

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Publication number
WO2017215390A1
WO2017215390A1 PCT/CN2017/084546 CN2017084546W WO2017215390A1 WO 2017215390 A1 WO2017215390 A1 WO 2017215390A1 CN 2017084546 W CN2017084546 W CN 2017084546W WO 2017215390 A1 WO2017215390 A1 WO 2017215390A1
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port
multicast
broadcast
aggregation
ecid
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English (en)
Chinese (zh)
Inventor
杨世平
王同乐
曹淑玲
郑炎
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/201—Multicast operation; Broadcast operation

Definitions

  • This document relates to, but is not limited to, the field of communication technologies, and in particular, to a data forwarding port selection method and apparatus for a vertical stacking system.
  • the 802.1BR standard can be used to deploy a remote switch as a policy control switch in a virtual environment.
  • the edge virtual bridge can replicate packets to a set of remote interfaces, using a cascaded serial interface and a flexible design network. More efficient allocation of bandwidth for multicast frames, broadcast frames, and unicast frames.
  • FIG. 1 is a schematic diagram of the process of creating a virtual bridge by using the PE CSP protocol.
  • the PE (Port Extender) is used to apply for the creation of an extended port to the CB (Controlling Bridge). (Extended port creation) message to request the CB to create the corresponding extended interface, E-channel (E channel, control bridge and multiple channels established between the sites), and bind the E-channel to the extended interface; CB receives After the Extended Port Create message, create the corresponding extended BEP (Ext. Bridge Port Extender) interface to assign ECID to the BEP port (E-channel Identifier, extended channel identifier).
  • E-channel Identifier E-channel Identifier
  • the extended port of the PE is aggregated into an aggregation port through the Link Aggregation Control Protocol (LACP) and the aggregation port is added to a multicast/broadcast group.
  • LACP Link Aggregation Control Protocol
  • data packets need to be forwarded in the multicast/broadcast group, and the aggregation port must be able to perform routing and load balancing.
  • the first solution is to push the LACP configuration to the PE, and the PE manages and routes the configuration.
  • the disadvantage of this solution is that reliability cannot be guaranteed because the configuration needs to be pushed from the CB to the PE; and if the aggregated expansion port is distributed on two or more PEs, then for the PE, it cannot know the other of the aggregation ports. Member information, and it is also impossible to perform routing calculations on ports of other devices. Therefore, the program has great shortcomings and cannot be supported.
  • the second solution is to send the LACP configuration to the CB.
  • the chip itself selects routes based on the LACP members. This method is feasible if the LACP member is a normal physical port. However, if the LACP member is an extended port, the PE does not know the aggregated port and cannot know whether the port of its own device is in LACP. The actual physical port on the CB is the CASCADE port (the port that receives CSP packets on the CB). The routing and load balancing cannot be performed. Therefore, the program also has certain problems.
  • the present invention provides a data forwarding port selection method and device for a vertical stacking system, which can effectively perform routing in a networking scenario.
  • a data forwarding port selection method for a vertical stacking system includes:
  • the aggregation port is a port based on a link aggregation control protocol LACP, where the aggregation The member port of the port includes the port of at least one port expander PE device.
  • the binding the multicast or broadcast out port to the sending channel includes:
  • the multicast or broadcast extended channel identifier ECID generated by the multicast sending device is filled in the sending channel registration message together with the identifier of the multicast or broadcast outgoing port, and sent to the PE device;
  • the method before scanning the multicast or broadcast member and identifying the aggregation port, the method further includes:
  • a physical port of the PE device as an extension port of a multicast or broadcast sending device, where the multicast or broadcast sending device is a control bridge CB device;
  • the aggregation port is aggregated into at least one aggregation port, at least one of the aggregation ports is added to a multicast or broadcast group to become a multicast or broadcast member in a multicast or broadcast group.
  • the setting manner includes a hash algorithm.
  • a data forwarding port selection device for a vertical stacking system comprising:
  • An aggregation port identification module configured to scan a multicast or broadcast member and identify an aggregation port therein;
  • a port selection module configured to select a multicast or broadcast out port according to a setting manner from a member port of the aggregation port
  • the binding module is configured to bind the multicast or broadcast out port to the sending channel.
  • the aggregation port is a port based on a link aggregation control protocol LACP, and the member port of the aggregation port includes a port of at least one port expander PE device.
  • the binding module includes:
  • a port identifier extraction unit configured to extract an identifier of the multicast or broadcast out port
  • the message sending unit is configured to fill the multicast channel or the broadcast extension channel identifier ECID generated by the multicast sending device with the identifier of the multicast or broadcast out port in the sending channel registration message, and send the message to the PE device;
  • the binding unit is configured to generate, according to the multicast or broadcast ECID parsed in the sending channel registration message, the multicast or broadcast egress port and the multicast or broadcast ECID. And bound to the sending channel.
  • the device further includes:
  • the extended port setting module is configured to set the physical port of the PE device to be a multicast or broadcast transmitting device before the aggregated port identification module (501) scans the multicast or broadcast member and identifies the aggregated port therein.
  • the aggregation port is added to the module, and after the aggregation port is aggregated into at least one aggregation port, at least one of the aggregation ports is added to the multicast or broadcast group to become a multicast or broadcast member in the multicast or broadcast group.
  • the setting manner includes a hash algorithm.
  • a storage medium storing executable instructions; the executable instructions being executed by a processor to:
  • a data forwarding port selection device for a vertical stacking system comprising:
  • a memory configured to store program code
  • a processor configured to execute the program code, to perform the following operations:
  • the solution provided by the embodiment of the present invention effectively solves the problem that the multicast or broadcast packet is forwarded and routed on the LACP port that is aggregated by the PE expansion port, and prevents the PE device from multicasting or broadcasting the packet to all member ports of the aggregation port.
  • the LACP configuration is sent to the CB and the chip itself is selected according to the LACP member, if the LACP member includes an aggregation port, it is difficult to select a route.
  • the solution provided by the embodiment of the present invention can effectively solve the problem that when the LACP aggregation port joins the multicast group, the aggregated ECID cannot be allocated due to the unicast ECID of the aggregation port.
  • the physical port is bound to the multicast forwarding packet and the load balancing is disabled on the LACP. You can also select the multicast forwarding path of the packet in advance according to a method at the software level.
  • FIG. 1 is a flowchart of a method for selecting a data forwarding port of a vertical stacking system according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of some embodiments of an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a process of creating an expansion port
  • FIG. 4 is a schematic diagram of a longitudinal stack BEP port aggregation according to an embodiment of the present invention.
  • FIG. 5A is a schematic diagram of a LACP port record of a vertically stacked CB device according to an embodiment of the present invention
  • FIG. 5B is a schematic diagram of port recording of a vertically stacked PE device according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a data forwarding port selection apparatus of a vertical stacking system according to an embodiment of the present invention.
  • the first embodiment provides a method for selecting a data forwarding port of a vertical stacking system. As shown in FIG. 1 , the method includes the following steps 201-203:
  • Step 201 Scan a multicast or broadcast member to identify an aggregation port therein.
  • Step 202 Select a multicast or broadcast out port from the member ports of the aggregation port according to a setting manner.
  • Step 203 Bind the multicast or broadcast egress port to the sending channel. This can enable the packet to be sent to the multicast or broadcast egress port when forwarding.
  • the data forwarding port selection method of the vertical stacking system can select one port from the aggregation port as the outgoing port of all the member ports of the aggregation port or other data information.
  • the aggregation of the ports of one or more PE devices is aggregated in the multicast or broadcast member when the LACP configuration is sent to the CB. The port caused a problem that the route could not be selected.
  • different ports may be selected in an aggregation port according to the actual situation of the port and the content and attributes of the packets when the packets are forwarded or are in different packet forwarding times. As an out port.
  • the setting manner may be a random selection manner.
  • the aggregation port may be an LACP-based port, and the member port of the aggregation port may include a port of the PE device, and may include at least one port of the PE device.
  • the binding the multicast or broadcast out port to the sending channel may include:
  • the multicast or broadcast ECID generated by the multicast sending device is filled in the sending channel registration message together with the identifier of the multicast or broadcast egress port, and sent to the PE device;
  • the CB When an expansion port on a PE is aggregated into an aggregation port through LACP, the CB records the port ID of the member port of the aggregation port.
  • the member ports of the aggregation port have different ECIDs.
  • the LACP port is used as the logical interface for the PE expansion port to be aggregated.
  • the new ECID will not be allocated.
  • the CB sends a PE CSP packet E-channel registration message to the PE. After receiving the CSP packet carrying the E-channel registration message, the PE will set the group.
  • the broadcast ECID is bound to the aggregate port.
  • the method before the step of scanning the multicast/broadcast member and identifying the aggregation port, the method further includes:
  • a physical port of the PE device as an extension port of a multicast or broadcast sending device, where the multicast or broadcast sending device is a control bridge CB device;
  • the aggregation port is aggregated into at least one aggregation port, at least one of the aggregation ports is added to a multicast or broadcast group to become a multicast or broadcast member in a multicast or broadcast group.
  • Step 200 The physical port of the PE device is set as an extension port of a multicast or broadcast sending device, and the multicast or broadcast sending device is a control bridge CB device.
  • Step 2001 After the aggregation port is aggregated into at least one aggregation port, at least one of the aggregation ports is added to a multicast or broadcast group to become a multicast or broadcast member in a multicast or broadcast group.
  • Steps 201 to 203 are as described above.
  • the PE advertises the port of the PE device to the CB in turn through the Extended Port Create message.
  • the CB receives the packet and parses the identity of the PE port from it and records it. And the CB will uniquely assign an ECID to each PE port, and send the corresponding relationship between the ECID and the receiving port to the CB hardware, thus creating an extended interface on the CB.
  • the CB creates an extension port on the CASCADE port that corresponds to each actual port on the PE.
  • the CB sends an Extended Port Create Reply message to the PE, and carries the ECID assigned to the PE port as the unique identifier of the port on the PE.
  • the process of the CB and the extended bridge interface expander BPE1 when creating the extended port may include 101 to 107:
  • the control bridge device CB discovers BPE1 and initiates an internal expansion bridge interface expander creation process.
  • the LLDP Link Layer Discovery Protocol
  • the LLDP Link Layer Discovery Protocol
  • CB and BPE1 After CB and BPE1 discover each other, they independently trigger the device to send a CSP Open message, notify the other party that the CSP protocol is enabled, and wait for the other party to respond.
  • the CB device or the PE device After receiving the CSP Open message, the CB device or the PE device sends a CSP Open Reply message to the peer end to respond. Only when both the CB and the PE receive the CSP Open Reply packet, the two protocols and devices are ready to be connected.
  • the CB can initialize the BPE1 upstream port. Make some settings for the PE port by sending a Port Parameters Set message. The PE responds with a Port Parameters Set Reply message.
  • the CB initializes the C-VLAN component port, and the PE creates an extension port.
  • the PE sends an Extended Port Create packet to the CB, where the packet carries a physical port letter on the PE. interest.
  • the CB receives the Extended Port Create message and obtains the PE port ID carried in the packet and records it. For example, there are N ports on the PE (N is a positive integer), and the PE assigns a port identifier to each port, for example, numbers such as 1, 2, 3, ... N are used as unique identifiers.
  • the port identifier includes, but is not limited to, a number, as long as it can distinguish between different ports, for example, it can also be a symbol or the like.
  • the correspondence between these port identifiers and ports is recorded on the PE. All the ports on the PE can be reported to the CB by sending Extended Port Create packets.
  • the CB After receiving the Extended Port Create message, the CB parses out the port identifiers, for example, 1, 2, 3, ..., etc., and allocates a unicast ECID for each such PE port, where the size of the ECID is 0-4 kilobytes, the correspondence between the ECID and the PE port identifier assigned to the port is recorded in the local database or resource list of the CB, and the Extended Port Create Replay message can be sent to reply.
  • the port identifiers for example, 1, 2, 3, ..., etc.
  • the subsequent extended port creation process is similar to the previous process.
  • the port that receives CSP packets on the CB is called a CASCADE port, such as ports Port1 and Port2 in Figure 4.
  • the CB sends the CASCADE port of the Extended Port Create message carrying the port identifier n to the hardware along with the ECID assigned to the port n to create a corresponding expansion port for the port on the PE.
  • the ECB that is assigned to the port identified by the CB is encapsulated in the Extended Port Create Reply message and sent to the PE.
  • PE1 and PE2 have ports Port3 and Port4 respectively; Port, Port5, and Port6.
  • the port identifiers extracted or constructed by PE1 and PE2 for these ports are numbers 3, 4, 5, 6, and 7.
  • PE1 records the mapping between ports and port IDs, such as Port3-3 and Port4-4.
  • PE2 records the mapping between ports and port IDs, such as Port5-5, Port6-6, and Port7-7.
  • the PE sends an Extended Port Create message to the CB.
  • the packet carries the port identifiers of 3, 4, 5, 6, and 7.
  • the port IDs of the packets sent by PE1 are 3, 4, and the port IDs of the packets sent by PE2 are 5, 6, and 7.
  • Port1 receives the Extended Port Create message sent by PE1, and Port2 receives the Extended Port Create message sent by PE2.
  • the CB allocates ECIDs: 13, 14 for ports Port 3 and Port 4 whose ports are 3 and 4 on PE1, and assigns ECIDs: 15, 16, and 17 to ports 5, 6, and 7 of ports 5, 6, and 7 on PE2. Record the correspondence, for example: PE1: 3-13, 4-14; PE2: 5-15, 6-16, 7-17.
  • PE1 and PE2 are port identifiers on the PE, and the latter is the ECID assigned to the port identifier.
  • CB fills in the corresponding relationship
  • the extended port reply packet is sent to the PE. After receiving the Extended Port Create Reply packet, the PE resolves the ECID and port identifier (for example, PE1: 3-13, 4-14; PE2: 5-15, 6-16, and 7-17).
  • the locally recorded content (for example: PE1: Port3-3, Port4-4; PE2: Port5-5, Port6-6, Port7-7) is compared, and the ECID and its port are obtained, and then sent to the hardware, and the ECID is correspondingly The physical port is bound. Therefore, each physical port on the PE has a one-to-one correspondence with the expansion port of the CB.
  • Port3, Port4, Port5, Port6, and Port7 correspond to the extension ports Bep3, Bep4, Bep5, Bep6, and Bep7, respectively.
  • the two extended ports are aggregated into one aggregation port.
  • Bep4 and Bep5 are aggregated into one aggregation port, TRUNK1 or Bep6, and Bep7 is aggregated into an aggregation port, TRUNK2.
  • TRUNK1 is E-channel1
  • E2 is E-channel2.
  • the aggregation port regenerates the port ID X and sends an Extended Port Create message to the CB.
  • CB generates a new packet for the logical port.
  • the unicast ECID-X is sent back in the Extended Port Create Reply message.
  • this method has the following problems: First, the unicast ECID resource is occupied, and the port expandable capacity is reduced. Secondly, even if the ECID problem is not considered, the reassigned unicast ECID-X cannot be bound to the actual physical port. Because the actual physical port already has an assigned unicast ECID, such as 13, 14, 15, 16, 17, and again, the 802.1BR protocol does not specify that a unicast ECID should be assigned to the logical port. Based on the above three points, TRUNK1 and TRUNK2 no longer send extended Port Create messages to the CB for application.
  • TRUNK1 and TRUNK2 exist as logical ports floating on the BEP port, and no separate unicast ECID is bound to it.
  • CB records aggregate port members, CASCADE ports, and their unicast ECIDs, such as: TURNK1: 4-14-Port1 (CASCADE), 5-15-Port2 ( CASCADE); TRUNK2: 6-16-Port2 (CASCADE), 7-17-Port2 (CASCADE), the device can be seen in Figure 5A, Figure 5B.
  • CB assigns a multicast ECID to the multicast/broadcast and binds the multicast ECID to all members of the multicast group/broadcast group.
  • the CB sends an E-channel Register (E-channel register) message to the PE.
  • the PE device receives the E-channel Register packet and parses out the multicast ECID. Bind the ECID to the actual physical port on the PE.
  • the BEP4, the Bep5, and the Bep6 and the Bep7 are combined with the unicast ECID and can be bound to the multicast E-channel. Therefore, in this embodiment, the CB packet is sent to the E-channel and the port. Before binding, the CB can scan the multicast group members. If a member is an LACP aggregation port and its member port is an extension port, the CB can calculate the member port of the elected LACP as the egress port of the aggregation port. The egress port is configured to receive the multicast or broadcast packet or other data. After the egress port is selected, the member port identifier is extracted, and the ECID of the multicast is filled in the E-channel Register packet and sent to the PE for binding. set.
  • the setting manner may include a hash algorithm.
  • TRUNK1 and Bep6 and Bep7 which are aggregated by Bep4 and Bep5, are added to multicast ip224.1.1.1 and VLAN1000 respectively.
  • the CB records TRUNK1, TRUNK2 and its member identification and ECID: 3-13, 4-14; 5-15, 6-16.
  • CB allocates multicast ECIDs (range 4k+1 to 16k) to 500 and 12002 for TRUNK1 and TRUNK2.
  • the m+1th port of the LACP member is selected as the multicast.
  • the CB hardware is sent to the CASCADE port (Port2) where the Bep5 port is located, and is added to the multicast ip224.1.1.1.
  • the identifiers 5-15 (unicast ECID) and 5001 (multicast ECID) corresponding to Bep5 are filled in the E-channel Register message and sent to the PE.
  • the elected port is TRUNK1.
  • the first port is Bep4.
  • the port ID, unicast ECID, and multicast ECID of the E-channel Register message are 4, 14, and 5002, respectively, and the CASCADE port of the CB hardware is Port1.
  • the trunk 1000 Take the trunk 1000 as the example.
  • the multicast ECID assigned by the CB to the VLAN 1000 is 12002
  • the corresponding port is the first port of the TRUNK2, Port6, and the unicast ECID. Is 16, the port is identified as 6.
  • the CASCADE port of the CB hardware is Port2, and the port identifier, unicast ECID, and multicast ECID in the E-channel Register message are: 6, 16, and 12002.
  • the PE receives the E-channel Register packet and parses out the multicast ECID and port identifier.
  • TRUNK1 joins multicast ip224.1.1.1 as an example.
  • the PE parses out 5, 15, and 5001 from the E-channel Register message.
  • the corresponding port is found as Port5, and then Port5 is bound to the multicast ECID5001.
  • the actual port that is added to multicast ip224.1.1.1 is port 5, and Port 4 is not in multicast ip224.1.1.1.
  • TRUNK1 joins multicast ip224.1.1.2 and TRUNK2 joins VLAN 1000 this method can be used.
  • the ports actually added are Port4 and Port6.
  • the aggregation port does not allocate a unicast ECID (which is different from the member interface ECID of the LACP). That is, the CB fails to detect that the LACP aggregation port on the PE is a separate expansion port. Therefore, a member interface of the LACP (the extended port of the PE) can be selected and bound to the multicast ECID. When multicast traffic is forwarded or copied to the LACP, it is forwarded to the elected member interface. Therefore, the ECID is not allocated to the LACP port, which saves the unicast ECID resource and reduces the complexity of hardware hash routing between different expansion ports on the PE.
  • Embodiment 2 A data forwarding port selection device of a vertical stacking system, as shown in FIG. 6, includes:
  • the aggregation port identification module 501 is configured to scan a multicast or broadcast member and identify an aggregation port therein;
  • the port selection module 502 is configured to select a multicast or broadcast out port from the member ports of the aggregation port according to a setting manner;
  • the binding module 503 is configured to bind the multicast or broadcast egress port to the sending channel, so that the packet can be sent to the multicast/broadcast egress port when the packet is forwarded.
  • the aggregation port may be a port based on a link aggregation control protocol LACP, and a member port of the aggregation port may include a port of at least one PE device.
  • the binding module may include:
  • a port identifier extraction unit configured to extract an identifier of the multicast or broadcast out port
  • the message sending unit is configured to fill the multicast channel or the broadcast ECID generated by the multicast sending device with the identifier of the multicast or broadcast port in the sending channel registration message, and send the packet to the PE device;
  • the binding unit is configured to generate, according to the multicast or broadcast ECID parsed in the sending channel registration message, the multicast or broadcast egress port and the multicast or broadcast ECID, and the Send channel binding.
  • the apparatus may further include:
  • An extended port setting module configured to set a physical port of the PE device as an extension port of a multicast or broadcast sending device, before the aggregation port identification module scans the multicast or broadcast member, and identifies the aggregation port therein,
  • the multicast or broadcast sending device is a control bridge CB device;
  • the aggregation port is added to the module, and after the aggregation port is aggregated into at least one aggregation port, at least one of the aggregation ports is added to the multicast or broadcast group to become a multicast or broadcast member in the multicast or broadcast group.
  • the setting manner may include a hash algorithm.
  • Embodiment 3 A storage medium storing executable instructions; when the executable instructions are executed by a processor, the following operations are implemented:
  • the multicast or broadcast egress port is bound to the sending channel, so that when the packet is forwarded, the packet can be sent to the multicast or broadcast egress port.
  • Embodiment 1 For other implementation details, refer to Embodiment 1.
  • Embodiment 4 A data forwarding port selection device of a vertical stacking system, comprising:
  • a memory configured to store program code
  • a processor configured to execute the program code, to perform the following operations:
  • Embodiment 1 For other implementation details, refer to Embodiment 1.
  • the solution provided by the foregoing embodiment effectively solves the problem that the multicast/broadcast packet is forwarded and routed on the LACP port that is aggregated by the PE expansion port, and prevents the PE device from multicasting or broadcasting the packet to all member ports of the aggregation port. Therefore, when the LACP configuration is sent to the CB and the chip itself is selected according to the LACP member, if the LACP member includes the aggregation port, it is difficult to select a route.
  • the solution provided by the foregoing embodiment can effectively solve the problem that the LACP aggregation port is added to the multicast group, and the aggregated ECID cannot be bound to the actual physical port because the aggregation port has no unicast ECID.
  • the problem of routing forwarding and load balancing cannot be performed on the LACP.
  • the solution provided by the embodiment of the present invention effectively solves the problem that the multicast/broadcast packet is forwarded and routed on the LACP port that is aggregated by the PE expansion port, and the PE device can prevent multicast or broadcast packets from all the member interfaces of the aggregation port.
  • the LACP configuration is sent to the CB and the chip itself is selected according to the LACP member, if the LACP member includes an aggregation port, it is difficult to select a route.

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Abstract

La présente invention porte sur un procédé et sur un dispositif permettant de sélectionner un port de transfert de données d'un système d'empilement longitudinal. Le procédé consiste : à balayer un élément de diffusion/multidiffusion et à reconnaître un port d'agrégation dans ce dernier ; à sélectionner un port de sortie de multidiffusion ou de diffusion selon une manière définie à partir de ports d'élément du port d'agrégation ; et à lier le port de sortie de multidiffusion ou de diffusion à un canal de transmission. Le dispositif comprend : un module de reconnaissance de port d'agrégation ; un module de sélection de port ; et un module de liaison.
PCT/CN2017/084546 2016-06-13 2017-05-16 Procédé et dispositif permettant de sélectionner un port de transfert de données d'un système d'empilement longitudinal Ceased WO2017215390A1 (fr)

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CN201610420117.4 2016-06-13

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