WO2012126295A1 - Procédé de traitement de trames de données d'envoi individuel inconnu, appareil de routage et système de réseau trill - Google Patents

Procédé de traitement de trames de données d'envoi individuel inconnu, appareil de routage et système de réseau trill Download PDF

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Publication number
WO2012126295A1
WO2012126295A1 PCT/CN2012/071038 CN2012071038W WO2012126295A1 WO 2012126295 A1 WO2012126295 A1 WO 2012126295A1 CN 2012071038 W CN2012071038 W CN 2012071038W WO 2012126295 A1 WO2012126295 A1 WO 2012126295A1
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Prior art keywords
data frame
routing bridge
destination
transmission
bridge
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PCT/CN2012/071038
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English (en)
Chinese (zh)
Inventor
翟洪军
成明江
吕二春
赵静静
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中兴通讯股份有限公司
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Publication of WO2012126295A1 publication Critical patent/WO2012126295A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1881—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with schedule organisation, e.g. priority, sequence management

Definitions

  • the present invention relates to network communication or, in particular, to a method, a routing device and a TRILL network system for processing an unknown unicast data frame in a TRTLL (Transparent Interconnection Over Lots of Links) network.
  • TRTLL Transparent Interconnection Over Lots of Links
  • TRILL is the connection layer (L2) network standard recommended by the IETF (Internet Engineering Task Force) to address the STP (Spanning Tree Protocol) in large data centers.
  • L2 connection layer
  • STP Shortning Tree Protocol
  • TRILL solves the L2 loop problem by introducing an IS-IS (Intermediate System to Intermediate System) routing protocol into the L2 network, while preserving L2 multipath (or ECMP (Equivalent Cost Multiple Path)).
  • IS-IS Intermediate System to Intermediate System
  • ECMP Equivalent Cost Multiple Path
  • the device running the TRILL protocol is called RBridge.
  • the TRILL network At the entrance of the TRILL network, it is responsible for encapsulating the unicast data frame of the end system into a TRILL format (that is, adding a TRILL header and an outer frame header in front of the original data frame, and the encapsulated data frame is called a TRILL data frame).
  • the routing bridge injected into the TRILL network is called Ingress.
  • the routing bridge responsible for decapsulating the TRILL data frame into the original data frame and forwarding it to the destination end system is called Egress.
  • other routing bridges are responsible for transmitting TRILL unicast data frames from the Ingress to the Egress, called the transport routing bridge.
  • Ingress When Ingress receives an unknown unicast data frame (Ingress does not find the ECMP path of the ill ill destination MAC (Media Access Control) address in the local MAC (Media Access Control) table), it will multicast it. Data frames are TRILL encapsulated and along A distribution tree that can reach all routing bridges in the local TILL network distributes the data frame. This will cause all routing bridges to receive the data frame, thus ensuring that the destination system can receive the data frame. After receiving the data frame, each routing bridge on the distribution tree performs decapsulation (TRILL decapsulation and MAC decapsulation) of the data frame to confirm whether it is connected to the end system where the destination MAC address is located.
  • decapsulation TRILL decapsulation and MAC decapsulation
  • the routing bridge can distribute the MAC address information of the local and remote end systems through the ESADI (End Station Address Distribution Information) protocol, the ESADI protocol is only an optional protocol. Not all routing bridges implement this protocol. In the absence of the ESADI protocol, the routing bridge can only learn the remote MAC address information by decapsulating the TRILL data frame (ie, self-learning mode).
  • ESADI End Station Address Distribution Information
  • the main technical problem to be solved by the present invention is to provide an unknown unicast data frame processing method, a routing device, and a TRILL network system, which alleviate the resource consumption of the routing bridge during the processing of the unknown unicast data frame. Waste of network bandwidth.
  • the present invention provides a method for processing an unknown unicast data frame, which includes the following steps:
  • the transmission routing bridge When the transmission routing bridge receives the data frame multicasted by the upstream node of the distribution tree as an unknown unicast data frame, it determines whether the location information of the destination system of the data frame is stored locally, and the destination end of the data frame is locally stored. Positioning information of the system, the data frame is processed and forwarded to the destination end system or a routing bridge connected to the destination end system, and the data frame is terminated along other downstream of the transmission routing bridge. Continue to distribute; the destination of the data frame is not stored locally The location information of the end system continues to be distributed along the downstream of the transport routing bridge in a multicast manner. In an embodiment of the present invention, when there are multiple downstream of the transmission routing bridge, and multiple downstream routing bridges of the transmission routing bridge are connected to the destination end system, the transmission route The bridge selects an optimal downstream routing bridge to send the processed data frame.
  • the determining, by the transmission routing bridge, whether location information of the destination system in which the data frame is stored locally includes: setting a destination MAC address of the data frame and the transmission routing bridge Comparing the MAC table, if the MAC table of the transmission routing bridge has an entry corresponding to the destination MAC address of the data frame, indicating that the transmission routing bridge stores the destination system of the data frame Location information, the MAC of the transmission routing bridge is not stored by the bridge for the location information of the destination system of the data frame.
  • the transmission routing bridge when the Egress in the entry corresponding to the destination MAC address of the data frame in the MAC table of the transmission routing bridge is the transmission routing bridge, indicating the transmission route The bridge is connected to the destination system; otherwise, the transmission routing bridge is connected to the next destination bridge that reaches the destination system.
  • the transmission routing bridge when the transmission routing bridge is connected to the destination system, the transmission routing bridge directly sends the original data frame obtained by decapsulating the data frame to the The destination end system; otherwise, the transmission routing bridge re-encapsulates the data frame in a unicast format and forwards it to the next destination routing bridge connected to the destination system in a unicast manner.
  • the method before the transmission routing bridge receives the data frame multicasted by the upstream node of the distribution tree as an unknown unicast data frame, the method further includes:
  • the transmission routing bridge determines whether the received data frame is an unknown unicast data frame, and the transmission routing bridge determines that the received data frame is an unknown unicast data frame, and processes the transmission data according to the above steps.
  • the bridge determines that the received data frame is not an unknown unicast data frame. Continued distribution along the downstream of the transport routing bridge in a multicast manner.
  • determining whether the received data frame is an unknown unicast data frame includes the following steps: determining, according to a MAC address addressing rule, whether the destination MAC address of the data frame is a unicast address, determining The destination MAC address of the data frame is a unicast address, and the data frame is an unknown unicast data frame, and the destination MAC address of the data frame is not a unicast address, and the data frame is a general multicast data. frame.
  • the transmission routing bridge before the step of determining, by the transmission routing bridge, whether the received data frame is an unknown unicast data frame, the transmission routing bridge further determines whether the received data frame is complete. And valid, if it is determined that the received data frame is complete and valid, it continues to process, and determines that the received data frame is incomplete or invalid, and discards it.
  • the transmission routing bridge before the step of determining, by the transmission routing bridge, whether the received data frame is an unknown unicast data frame, the transmission routing bridge further comprises: performing, by using, the received data frame Decapsulating acquires an upstream neighbor of the transport routing bridge and acquires information and Ingress information of the distribution tree.
  • the present invention also provides a routing device, the routing device comprising: a receiving module; a determining module and a processing module;
  • the receiving module is configured to receive a data frame
  • the determining module is configured to determine whether the data frame is an unknown unicast data frame and determine location information of the destination system in which the routing device stores the data frame;
  • the processing module is configured to: after processing the data frame according to the judgment result of the determining module, forwarding the data frame to the destination end system or a routing bridge connected to the destination end system, and terminating the data frame The distribution continues along the other downstream of the transport routing bridge; or continues to be distributed downstream along the transport routing bridge in a multicast manner.
  • the apparatus further includes an obtaining module, configured to decapsulate the data frame to obtain corresponding information, and determine whether the data frame is complete and valid, and the acquiring module acquires
  • the information includes an upstream neighbor of the routing device, a destination MAC address of the data frame, and information of the distribution tree and Ingress information.
  • the present invention also provides a multi-link transparent interconnect TRILL network system, comprising at least one sender system and destination system, and at least one routing device as described above connected between the sender system and the destination system .
  • the present invention has the following advantages: when the transmission routing bridge of the present invention receives the unknown unicast data frame multicasted by the upstream node of the distribution tree, it determines whether the location information of the destination end system of the unknown unicast data frame is stored locally, if If yes, the transmission routing bridge is connected to the destination system of the data frame or to another routing bridge on the path of the destination system, and the transmission routing bridge processes the data frame and forwards the data frame to the The destination end system forwards the data frame to a routing bridge connected to the destination end system, and terminates the received data frame to be distributed along other downstream routes of the transmission routing bridge, thereby avoiding other subsequent routes. The bridge processes the data frame, thereby reducing the consumption of routing bridge resources and improving the utilization of network bandwidth.
  • FIG. 1 is a schematic flowchart of a process for processing an unknown unicast data frame according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of processing an unknown unicast data frame according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a processing system for an unknown unicast data frame according to an embodiment of the present invention.
  • the present invention provides a location for the unknown unicast data frame.
  • the method reduces the resource consumption of the routing bridge and improves the utilization of the bandwidth.
  • the transmission routing bridge After the transmission routing bridge receives the data frame sent by the upstream node of the distribution tree as an unknown unicast data frame, it determines whether the location of the destination system of the data frame is stored in the local address table of the transmission routing bridge. The information is judged, if the location information of the destination system of the data frame is stored locally, the transmission routing bridge processes the data frame and forwards the data to the destination system or the route connected to the destination system. The bridge, and terminating the data frame to continue to be distributed along the other downstream of the transport routing bridge, otherwise the transport routing bridge continues to multicast the unknown unicast data frame to be received downstream of the transport routing bridge After the distribution is continued, the downstream routing bridge receives the unknown unicast data frame and processes it according to the above processing method.
  • the transmission routing bridge selects an optimal one.
  • the downstream routing bridge sends the processed data frame, and the selection may be based on the length of the distance from each downstream routing bridge to the destination end system, or the consumption of resources on each downstream routing bridge.
  • the downstream of the routing bridge refers to the path of the routing bridge to other routing bridges directly connected thereto (such as the connection between RB2 and RB4 in Figure 4), for example, the routing network.
  • the bridge 1 is directly connected to the routing bridges 2, 3, the routing bridge 4 is directly connected to the routing bridge 2, and the routing bridges 5, 6 are directly connected to the routing bridge 3, and the routing bridge 1 and the routing bridge 2 are connected.
  • the direct connection path is the two downstream of the routing bridge 1, the routing bridges 2, 3 are the two downstream routing bridges of the routing bridge 1, and the routing bridge 4 is the routing bridge downstream of the routing bridge 2.
  • the routing bridges 5, 6 are two downstream routing bridges of the routing bridge 3.
  • the transmission routing bridge determines whether the local location information of the received unknown unicast data frame is: the destination MAC address of the received unknown unicast data frame and the transmission routing bridge. MAC table for comparison, if the MAC table of the transmission routing bridge If there is an entry corresponding to the destination MAC address of the unknown unicast data frame, it indicates that the transmission routing bridge stores the location information of the destination system of the unknown unicast data frame, that is, the transmission routing bridge and the unknown The destination system of the unicast data frame is connected, or is connected to the next destination routing bridge on the path of the destination system that arrives at the unknown unicast data frame; otherwise, the transmission routing bridge does not store the unknown unicast data frame. The location information of the destination system, that is, the transmission routing bridge does not find the ECMP path to the destination MAC in the local MAC table.
  • the Egress in the corresponding entry is the transmission routing bridge. In itself, if yes, it indicates that the transmission routing bridge is directly connected to the destination system of the received unknown unicast data frame, and the transmission routing bridge unblocks the data frame, and directly sends the obtained original data to The destination system; otherwise, the Egress in the corresponding entry is another routing bridge connected to the destination system, and the transmission routing bridge receives the unknown unicast data frame in a unicast format according to the Egress in the corresponding entry. After re-encapsulation, it is unicastly sent to the corresponding next destination routing bridge.
  • the transmission bridge receives the data frame multicasted by the upstream node, it first needs to determine whether the data frame is an unknown unicast data frame. If yes, it is processed according to the above method, and no The data frame is distributed downstream of the transmission routing bridge.
  • the specific judgment method is as follows:
  • the outer MAC header of the data frame is parsed, the validity check is performed, and the upstream neighbor is obtained. If valid, the TRILL header of the data frame is continuously parsed, and the data frame is further checked. Integrity and validity, and obtain information such as distribution tree and Ingress. If the data frame is complete and valid, further parse the inner MAC of the data frame, obtain its destination MAC address, and then determine the obtained MAC address encoding rule.
  • the transport routing bridge continues to distribute the received data frames along its downstream in a multicast manner.
  • Step 1 The transmission routing bridge receives the multicast data frame in the TRILL encapsulation format from the specified interface.
  • Step 2 Parse the outer MAC header of the data frame, obtain the upstream neighbor, and determine the validity of the data frame. If the data frame is illegal, it is discarded and enters the transmission link of the next data frame. Otherwise, the TRILL header of the data frame is further parsed to obtain information such as the distribution tree and Ingress, and the integrity of the data frame is checked. Validity (such as neighbor check, reverse path check, etc.), if it is an invalid data frame, discard it, otherwise, continue to parse the inner MAC frame of the data frame to obtain its destination MAC address.
  • Validity such as neighbor check, reverse path check, etc.
  • Step 3 According to the MAC address addressing rule, determine whether the destination MAC address of the data frame is a unicast MAC address. If yes, the received data frame is a unicast data frame of an unknown destination, and proceed to step 4, otherwise General multicast data frame, go to step 5;
  • Step 4 Compare and retrieve the obtained destination MAC address with the local MAC table of the route transmission bridge. If an entry corresponding to the destination MAC address is found in the local MAC table, the routing bridge knows the data frame. The location of the destination system, go to step 6, otherwise continue to step 5;
  • Step 5 Continue to distribute the data frame in a multicast manner along the downstream of the transmission routing bridge, and the processing of the data frame by the transmission routing bridge ends.
  • Step 6 determining whether the Egress in the entry corresponding to the destination MAC address is the transmission routing bridge itself, and if so, indicating that the transmission routing bridge is directly connected to the destination end system of the data frame, and proceeds to step 9; Otherwise, the transmission routing bridge is not Egress, go to step 7.
  • Step 7 The transmission routing bridge re-encapsulates the data frame in unicast format. (Ingress is unchanged, and Egress is directly obtained from the destination system in step 6. Connected route bridge);
  • Step 8 Query the ECMP table according to the obtained MAC address corresponding to the destination MAC address of the data frame, find the next destination routing bridge to the destination system, and then forward the processed data frame in step 7 to Next destination routing bridge; when there are many downstream routes of the transmission routing bridge And the plurality of downstream routing bridges of the transmission routing bridge are connected to the destination end system of the received unknown unicast data frame, and the transmission routing bridge selects an optimal downstream routing bridge to send the processing. After the data frame, then go to step 10;
  • Step 9 Decapsulate the obtained data frame into the original data frame and forward it to the destination system.
  • Step 10 Terminate the data frame to continue to distribute along the other downstream of the transport routing bridge.
  • the embodiment further provides a routing device. As shown in FIG. 3, the routing device includes a receiving module, an obtaining module, a determining module, and a processing module, which are sequentially connected, where:
  • a receiving module configured to receive a data frame from the specified interface
  • the obtaining module is configured to decapsulate the received data frame to obtain corresponding information, and determine whether the data frame is complete and valid, where the obtained information includes an upstream neighbor of the routing device, and a destination MAC of the received data frame. Address and information about the distribution tree and Ingress information.
  • a judging module configured to determine whether the received data frame is an unknown unicast data frame and determine location information of the destination system in which the routing device stores the data frame locally;
  • Processing module configured to forward the received data frame to the destination system of the data frame or a routing bridge connected to the destination end system of the data frame according to the judgment result of the determining module, and terminate the The data frame continues to be distributed along the other downstream of the transport routing bridge; or continues to distribute the data frame downstream of the transport routing bridge in a multicast manner.
  • the transmission routing bridge selects an optimal one.
  • the downstream routing bridge sends the processed data frame, and the selection may be based on the length of the distance from each downstream routing bridge to the destination end system, or the consumption of resources on each downstream routing bridge. Reduce the overhead of the system and improve the processing efficiency of the system.
  • the embodiment also provides a TRILL network system, including multiple end systems and a plurality of the foregoing routing devices, wherein the multiple end systems included may be the transmitting end system or the mesh according to actual conditions.
  • the end system, the above routing device connects multiple end systems, see Figure 4, H1-H6 is the end system, RB1-RB8 is the above routing device, in the figure, HI is the transmitting end system, H3 is the destination end system, HI Send a unicast data frame to H3.
  • RB1 in this case, Ingress
  • the original data frame sent by HI is encapsulated into a TRILL multicast data frame distributed along the distribution tree (the dotted path in the figure).
  • the unknown unicast data frame After the unknown unicast data frame is determined, it is determined that H3 is connected to itself, and the received unknown unicast data frame is decapsulated into the original data frame and then forwarded to H3, and then the continuation of the received unknown unicast data frame is terminated. Distribute to the downstream of RB2, thereby avoiding the processing of the data frame by RB4, RB5, RB7 and RB8.
  • H6 when HI is the transmitting end system, H6 is the destination end system, HI sends a unicast data frame to H6, RB1 (in this case, Ingress) does not know the location of H6, and then encapsulates the original data frame sent by HI into TRILL.
  • the multicast data frame is distributed along the distribution tree (the dotted path in the figure). After receiving the unknown unicast data frame, RB2 determines that H6 is connected to its own downstream RB4 and RB5, and RB2 determines that RB5 to H6 are found.
  • the received unknown unicast data frame is re-encapsulated in unicast format and then forwarded to RB5, and then the received unknown unicast data frame is terminated and continued to be distributed to the downstream RB4, thereby avoiding RB4, RB7 processing of the data frame.
  • the method provided by the present invention can prevent all routing bridges in the system from processing the data when processing the unknown unicast data frame, thereby reducing waste of resources of the routing bridge in the system and improving system bandwidth. Utilization.
  • the method provided by the present invention only needs the local implementation of the transmission routing bridge, and does not involve modification of other routing bridge devices and protocols, and the cost is low and easy to implement. It is to be understood that the specific embodiments of the invention are limited only by the description. It is to be understood by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

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

Abstract

La présente invention porte sur un procédé de traitement de trames de données d'envoi individuel inconnu, qui comprend les opérations suivantes : un pont routeur (RBridge) de transmission reçoit une trame de données de diffusion groupée, qui est une trame de données d'envoi individuel, en provenance d'un nœud amont sur un arbre de distribution, et détermine si des informations de localisation d'un système de destination de la trame de données sont stockées localement ; le cas échéant, la trame de données est acheminée vers le système de destination ou le RBridge connecté au système de destination après traitement, et la distribution de la trame de données le long des autres nœuds avals du RBridge de transmission est arrêtée ; dans le cas contraire, la distribution en aval du RBridge de transmission se poursuit à la manière d'une diffusion groupée. Un appareil de routage et un système de réseau d'interconnexion transparente sur un grand nombre de liaisons (TRILL) sont décrits d'une manière correspondante. La présente invention peut réduire la consommation des ressources du RBridge, et améliorer le taux d'utilisation de la bande passante du réseau.
PCT/CN2012/071038 2011-03-18 2012-02-10 Procédé de traitement de trames de données d'envoi individuel inconnu, appareil de routage et système de réseau trill WO2012126295A1 (fr)

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CN201110066113.8A CN102130812B (zh) 2011-03-18 2011-03-18 一种未知单播数据帧的处理方法、装置及系统

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CN102130812B (zh) * 2011-03-18 2015-05-20 中兴通讯股份有限公司 一种未知单播数据帧的处理方法、装置及系统
CN102244614B (zh) * 2011-08-15 2014-07-02 福建星网锐捷网络有限公司 报文转发方法、系统及路由交换机
CN102333023B (zh) * 2011-09-30 2014-01-01 福建星网锐捷网络有限公司 多链接透明互联网络中的通信方法及设备
CN102710510B (zh) 2012-05-18 2018-03-13 中兴通讯股份有限公司 信息处理方法、装置及系统
CN102752175A (zh) * 2012-07-26 2012-10-24 杭州华三通信技术有限公司 一种多链接透明互联网络中连通性检查方法和装置
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