WO2012122817A1 - Procédé et système de commutation de protection de tunnel de multidiffusion p2mp - Google Patents

Procédé et système de commutation de protection de tunnel de multidiffusion p2mp Download PDF

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Publication number
WO2012122817A1
WO2012122817A1 PCT/CN2011/082376 CN2011082376W WO2012122817A1 WO 2012122817 A1 WO2012122817 A1 WO 2012122817A1 CN 2011082376 W CN2011082376 W CN 2011082376W WO 2012122817 A1 WO2012122817 A1 WO 2012122817A1
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WO
WIPO (PCT)
Prior art keywords
tunnel
traffic
primary
leaf node
interface
Prior art date
Application number
PCT/CN2011/082376
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English (en)
Chinese (zh)
Inventor
杨慧
曲延锋
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of WO2012122817A1 publication Critical patent/WO2012122817A1/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
    • H04L12/02—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
    • H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • 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
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2212/00—Encapsulation of packets
    • 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
    • H04L45/16—Multipoint routing

Definitions

  • the present invention relates to MPLS (Multi-protocol Label Switching) technology, and in particular, to a protection switching method and system for a Point 2 Multiple Point (P2P) multicast tunnel.
  • MPLS Multi-protocol Label Switching
  • P2P Point 2 Multiple Point
  • the conventional tunnel protection mode is divided into 1+1 protection and 1:1 protection.
  • the 1+1 protection is mostly unidirectional, that is, as long as the protection direction is switched at one end of the protection domain.
  • 1:1 must be bidirectional, that is, the corresponding protection switching should be performed at both ends of the protection domain.
  • the protection tunnel is dedicated to its corresponding working tunnel.
  • the working tunnel and the protection tunnel are bridged at the source end of the protection domain.
  • the service is sent to the protection domain at the same time on the working tunnel and the protection tunnel.
  • the service from the working tunnel or the protection tunnel is selected to be received based on some predetermined criterion, such as a defect indication, that is, the protection switching is performed by the sink end of the protection domain completely based on the local information, and the source end of the protection domain does not have to be Perception.
  • a P2MP multicast tunnel is a one-way multicast tunnel with multiple sinks. There are many branches in the middle. In the actual application of a P2MP multicast tunnel, the 1+1 protection switching mode is usually used. The reasons are as follows: 1) The tunnel itself is unidirectional, adopting the 1+1 switching mode based on the sink, and the one-way OAM (Operation Administration, Maintenance, Operation, Maintenance, Maintenance) detection mechanism can meet the requirements, and the implementation is simple; (2) Based on the sink The detection switching mode only needs to switch the failed branch, and does not need to switch all; (3) 1+1 protection switching mode, the receiving interface can be switched immediately, and the switching performance is high.
  • OAM Operaation Administration, Maintenance, Operation, Maintenance, Maintenance
  • the sink usually relies on the OAM detection information to determine whether protection switching is required.
  • OAM detection mode is also used to trigger the protection switching.
  • the unicast routing link convergence of IP multicast is used to perform protection switching, the path switching time is too long to meet the performance requirement of the customer's protection switching within 50 ms. Summary of the invention
  • the object of the present invention is to provide a protection switching method and system for a P2MP multicast tunnel, which is used to solve the 50 ms switching of the P2MP multicast tunnel without any other normal branches.
  • the present invention provides a protection switching method for a P2MP multicast tunnel, including:
  • Each leaf node performs switching of the primary standby tunnel according to the respective primary traffic.
  • the step C is:
  • the receiving interface of the corresponding leaf node is switched from the inbound interface of one tunnel to the inbound interface of the other tunnel; otherwise, the switching is not performed.
  • step B further includes:
  • the traffic of the inbound interface of each leaf node is counted, and the standby traffic of each leaf node is obtained.
  • step C further includes:
  • the primary standby tunnel is switched according to the difference between the standby traffic and the primary traffic.
  • step C further includes: If the difference between the standby traffic and the primary traffic is greater than the predetermined value, the receiving interface of the corresponding leaf node is switched from the inbound interface of one tunnel to the inbound interface of the other tunnel; otherwise, the switching is not performed.
  • the present invention also provides a protection switching system for a P2MP multicast tunnel, including:
  • An information transmission unit configured to establish an active tunnel and a standby tunnel respectively between the root node of the P2MP multicast and each leaf node;
  • the traffic statistics unit is configured to perform statistics on the traffic of the primary tunnel inbound interface of each leaf node, and obtain the primary traffic of each leaf node.
  • the interface switching unit is configured to perform switching between the primary standby tunnel according to the primary traffic of each leaf node.
  • the interface switching unit is further configured to switch the receiving interface of the corresponding leaf node from the inbound interface of the tunnel to the ingress interface of the other tunnel when the primary traffic does not change during the statistical period; otherwise, the switching is not performed.
  • the traffic statistics unit is further configured to perform statistics on the traffic of the ingress tunnel interface of each leaf node, and obtain the standby traffic of each leaf node.
  • the interface switching unit is further configured to perform switching between the primary and secondary tunnels for the difference between the standby traffic and the primary traffic.
  • the interface switching unit is further configured to: when the difference between the standby traffic and the primary traffic is greater than a predetermined value, switch the receiving interface of the corresponding leaf node from the inbound interface of one tunnel to the inbound interface of the other tunnel; Switch.
  • the present invention implements the 50ms switching of the P2MP multicast tunnel in the case of not affecting other normal branches and the arbitrary failure on the tunnel by performing traffic statistics on the leaf nodes.
  • FIG. 1 is a schematic flowchart of a protection switching method of a P2MP multicast tunnel provided by the present invention
  • FIG. 2 is a schematic structural diagram of a protection switching system of a P2MP multicast tunnel provided by the present invention
  • 3a is a schematic diagram of normal operation of P+1MP multicast tunnel 1+1 protection according to an embodiment of the present invention
  • FIG. 3b is a schematic diagram of the operation of the P2MP multicast tunnel 1+1 protection fault occurrence according to the embodiment of the present invention.
  • FIG. 4 is a flowchart of a protection switching mechanism of a P2MP multicast tunnel according to an embodiment of the present invention
  • FIG. 5 is a flowchart of an improved protection switching mechanism of a P2MP multicast tunnel according to an embodiment of the present invention
  • 6a is a schematic diagram of a normal operation of a protection switching mechanism according to an embodiment of the present invention.
  • Figure 6b is a schematic diagram of the failure of the primary link of the protection switching mechanism according to the embodiment of the present invention
  • Figure 6c is a schematic diagram of the failure of the branch link of the protection switching mechanism according to the embodiment of the present invention.
  • the basic idea of the present invention is: establishing an active tunnel and a standby tunnel between the root node of the P2MP multicast of the point-to-multipoint primary station and the leaf nodes respectively; performing traffic on the inbound interface of the primary tunnel of each leaf node Statistics, obtaining the primary traffic of each leaf node; the leaf nodes perform switching of the primary standby tunnel according to the respective primary traffic.
  • FIG. 1 is a schematic flowchart of a protection switching method of a P2MP multicast tunnel provided by the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step S101 A primary tunnel and a standby tunnel are respectively established between the root node of the P2MP multicast and each leaf node, where the root node is the source end of the protection domain, and the leaf node is the sink end of the protection domain.
  • Step S102 Perform statistics on the traffic of the ingress interface of the leaf node of each leaf node, and obtain the main traffic of each leaf node, and also collect statistics on the traffic of the ingress interface of each leaf node, and obtain the leaf nodes. Alternate traffic.
  • Step S103 Each leaf node determines according to the respective primary traffic. If the primary traffic does not change during the statistical period, the receiving interface of the corresponding leaf node is switched from the inbound interface of one tunnel to the inbound interface of another tunnel. ; otherwise, no switching is performed.
  • the receiving interface of the corresponding leaf node is from the inbound interface of a tunnel. Switch to the inbound interface of another tunnel; otherwise, do not switch.
  • FIG. 2 is a schematic structural diagram of a protection switching system of a P2MP multicast tunnel provided by the present invention. As shown in FIG. 2, the information transmission unit, the traffic statistics unit, and the interface switching unit are included.
  • the information transmission unit is configured to establish a primary tunnel and a standby tunnel between the root node and the leaf node of the P2MP multicast, where the root node is the source end of the protection domain, and the leaf node is the sink end of the protection domain.
  • the traffic statistics unit is configured to collect statistics on the traffic of the ingress interface of each leaf node, and obtain the primary traffic of each leaf node. In addition, it is also used to collect statistics on the traffic of the standby tunnel ingress of each leaf node, and obtain the standby traffic of each leaf node.
  • the interface switching unit is configured to perform switching between the primary and secondary tunnels according to the primary traffic of each leaf node.
  • the receiving interface of the corresponding leaf node is switched from the inbound interface of one tunnel to another.
  • the inbound interface of the tunnel otherwise, it does not switch.
  • the interface switching unit may further perform switching between the primary traffic and the primary traffic, and when the difference between the secondary traffic and the primary traffic is greater than a predetermined value, the receiving interface of the corresponding leaf node is The inbound interface of the tunnel is switched to the inbound interface of another tunnel; otherwise, the switch is not performed.
  • FIG. 3 is a schematic diagram showing the normal operation of the P2MP multicast tunnel 1+1 protection provided by the embodiment of the present invention
  • FIG. 3b is a schematic diagram showing the operation of the P2MP multicast tunnel 1+1 protection in the case of a fault occurrence.
  • the service is simultaneously sent to the sink of the protection domain on the working and protection tunnel.
  • the leaf node of the tunnel at the sink end, selects to receive traffic from the working or protection tunnel based on some predetermined criteria such as a defect indication, that is, the protection switching is completed by the protection domain's sink based entirely on local information, protection The source side of the domain does not have to be perceived.
  • FIG. 4 shows a flow of a protection switching mechanism of a P2MP multicast tunnel provided by an embodiment of the present invention, as shown in FIG. 4:
  • Step S401 Establish an active tunnel and a standby tunnel between the root node and each leaf node.
  • Step S402 Statistics are collected on the primary receiving interface on each leaf node.
  • Step S403 The traffic detected by the statistics is detected as faulty. If the traffic does not change during the statistics period, the process goes to step S402. If the traffic does not change during the statistics period, the fault occurs. Step S404 is performed.
  • Step S404 the receiving interface is switched from the primary receiving interface to the standby receiving interface.
  • Step S405 Statistics are collected on the current active receiving interface.
  • step S406 whether the active tunnel line is restored, if it is restored, step S407 is performed, and if there is no recovery, step S403 is performed.
  • step S407 it is determined whether to perform the switching of the primary standby tunnel according to the predetermined mode. If it is the immediate/delayed failback mode, step S408 is performed, and if it is the never-return mode, step S409 is performed.
  • Step S408 The receiving interface is switched back from the current active receiving interface to the previous active receiving interface.
  • Step S409 the traffic is counted for the current primary receiving interface after the switchback.
  • FIG. 5 shows a flow of a protection switching mechanism of an improved P2MP multicast tunnel provided by an embodiment of the present invention, as shown in FIG. 5:
  • Step S501 establishing an active tunnel and a standby tunnel between the root node and each leaf node.
  • Step S502 collecting statistics on the primary receiving interface and the standby receiving interface on each leaf node.
  • Step S503 The flow rate obtained by the statistics is detected as a fault. If the difference between the standby traffic and the primary traffic is within a predetermined value, then there is no fault, and step S502 is performed, if the standby traffic is If the difference of the primary traffic is not within the range of the predetermined value, the fault is performed.
  • step S504 step S504, the receiving interface is switched from the primary receiving interface to the standby receiving interface.
  • Step S505 Whether the active tunnel line is restored. If the recovery is successful, step S507 is performed. If there is no recovery, step S503 is performed.
  • step S506 it is determined whether to perform the switching of the primary standby tunnel according to the predetermined mode. If it is the immediate/delayed failback mode, step S507 is performed, and if it is the never-return mode, step S503 is performed.
  • Step S507 The receiving interface is switched back from the current active receiving interface to the previous active receiving interface.
  • Figure 6a shows the normal operation of the protection switching mechanism provided by the embodiment of the present invention. As shown in Figure 6a, the tunnel traffic on the inbound interface of the primary P2MP tunnel is counted on the leaf nodes PE2 and PE3 of the multicast tunnel. .
  • Figure 6b shows the fault of the primary link of the protection switching mechanism provided by the embodiment of the present invention. As shown in Figure 6b, if the primary link fails, both the PE2 and the PE3 switch the receiving interface to the receiving interface of the backup multicast tunnel. Both PE2 and PE3 are switched to receive traffic from the backup multicast tunnel. After the switchover, PE2 and PE3 collect statistics on the tunnel traffic on the inbound interface of the standby P2MP tunnel.
  • Figure 6c shows the fault of the branch link of the protection switching mechanism provided by the embodiment of the present invention. As shown in Figure 6c, when the branch link of the PE2 fails, the PE2 switches to receive traffic from the backup multicast tunnel, but the PE3 The fault is not sensed, and the traffic receiving interface does not perform any handover, and still receives traffic from the primary multicast tunnel.
  • the present invention completely relies on traffic statistics on a leaf node, and can ensure that any segment on the P2MP primary tunnel fails, and the traffic is not in the period before the route convergence is completed. Long-term interruptions occur, and both failover and recovery switching can be completed within 50ms, so the performance fully meets the customer's quality of service requirements, and will not cause other problems.

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

Abstract

La présente invention concerne un procédé et un système de commutation de protection de tunnel de multidiffusion d'un point vers multiples points (P2MP). Ledit procédé consiste à : établir respectivement un tunnel principal et un tunnel de sauvegarde entre le nœud racine et chaque nœud feuille ; collecter des statistiques de trafic d'interface de tunnel principal pour chaque nœud feuille afin d'obtenir le trafic principal de chaque nœud feuille ; et commuter chaque nœud feuille entre le tunnel principal et le tunnel de sauvegarde en fonction du trafic principal. La présente invention peut réaliser une commutation de tunnel de multidiffusion P2MP sans affecter d'autres branches normales et un basculement en 50 ms en cas de défaillances aléatoires de tunnel via une collecte des statistiques de trafic de chaque nœud feuille.
PCT/CN2011/082376 2011-03-15 2011-11-17 Procédé et système de commutation de protection de tunnel de multidiffusion p2mp WO2012122817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110061513.XA CN102123098B (zh) 2011-03-15 2011-03-15 一种p2mp组播隧道的保护切换方法和系统
CN201110061513.X 2011-03-15

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WO2012122817A1 true WO2012122817A1 (fr) 2012-09-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102123098B (zh) * 2011-03-15 2015-05-20 中兴通讯股份有限公司 一种p2mp组播隧道的保护切换方法和系统
CN105656782B (zh) * 2014-11-17 2020-03-27 中兴通讯股份有限公司 点对多点组播流量工程隧道系统及其路径选择方法和装置
CN106302165A (zh) * 2015-05-22 2017-01-04 中兴通讯股份有限公司 一种点到多点隧道的保护方法和装置
CN109873761A (zh) * 2017-12-04 2019-06-11 中兴通讯股份有限公司 一种热备环境中切换主备设备的方法和装置
CN117040951A (zh) * 2020-07-22 2023-11-10 华为技术有限公司 组播报文的发送方法、装置和系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1863094A (zh) * 2006-03-03 2006-11-15 华为技术有限公司 一种链路故障诊断方法及系统
US7251215B1 (en) * 2002-08-26 2007-07-31 Juniper Networks, Inc. Adaptive network router
CN101159669A (zh) * 2007-10-09 2008-04-09 华为技术有限公司 一种业务流量切换方法及装置
CN101610203A (zh) * 2008-06-16 2009-12-23 华为技术有限公司 实现组播重路由的方法、装置及系统
CN101656651A (zh) * 2008-08-19 2010-02-24 华为技术有限公司 流量工程隧道的关联保护方法及装置
WO2010080972A1 (fr) * 2009-01-09 2010-07-15 Futurewei Technologies, Inc. Protection de l'entrée et de la sortie d'un trajet à commutation d'étiquettes
CN102123098A (zh) * 2011-03-15 2011-07-13 中兴通讯股份有限公司 一种p2mp组播隧道的保护切换方法和系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7251215B1 (en) * 2002-08-26 2007-07-31 Juniper Networks, Inc. Adaptive network router
CN1863094A (zh) * 2006-03-03 2006-11-15 华为技术有限公司 一种链路故障诊断方法及系统
CN101159669A (zh) * 2007-10-09 2008-04-09 华为技术有限公司 一种业务流量切换方法及装置
CN101610203A (zh) * 2008-06-16 2009-12-23 华为技术有限公司 实现组播重路由的方法、装置及系统
CN101656651A (zh) * 2008-08-19 2010-02-24 华为技术有限公司 流量工程隧道的关联保护方法及装置
WO2010080972A1 (fr) * 2009-01-09 2010-07-15 Futurewei Technologies, Inc. Protection de l'entrée et de la sortie d'un trajet à commutation d'étiquettes
CN102123098A (zh) * 2011-03-15 2011-07-13 中兴通讯股份有限公司 一种p2mp组播隧道的保护切换方法和系统

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CN102123098A (zh) 2011-07-13

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