WO2012079418A1 - Procédé et système pour la protection de réseaux en anneaux tangents ou sécants - Google Patents

Procédé et système pour la protection de réseaux en anneaux tangents ou sécants Download PDF

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Publication number
WO2012079418A1
WO2012079418A1 PCT/CN2011/080734 CN2011080734W WO2012079418A1 WO 2012079418 A1 WO2012079418 A1 WO 2012079418A1 CN 2011080734 W CN2011080734 W CN 2011080734W WO 2012079418 A1 WO2012079418 A1 WO 2012079418A1
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WO
WIPO (PCT)
Prior art keywords
ring network
protection group
link
ring
network protection
Prior art date
Application number
PCT/CN2011/080734
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English (en)
Chinese (zh)
Inventor
郭平
Original Assignee
中兴通讯股份有限公司
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Filing date
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Publication of WO2012079418A1 publication Critical patent/WO2012079418A1/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]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration
    • 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
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]

Definitions

  • the present invention relates to the field of packet transmission network ring network protection technologies, and in particular, to a method and system for intersecting tangent ring network protection.
  • T-MPLS Transport-Multi Protocol Label Switching
  • LSP Label Switched Path
  • the technical problem to be solved by the present invention is to provide a method and system for protecting intersecting tangent ring networks, and to protect interconnected links on intersecting and tangent nodes of double loops.
  • the present invention provides a method for protecting a intersecting tangent ring network, configuring a bidirectional working tunnel at an intersecting or tangent node of the cross-ring protection, and establishing ring network protection in each direction of the working tunnel group.
  • the step of establishing a ring network protection group in each direction of the working tunnel includes: establishing, for the double-ring intersecting or tangent node, a westbound ring network protection group and an east in the west and east directions of the working tunnel respectively To the ring network protection group;
  • the method further includes: after completing the networking, the service traffic is taken by the working link of the westbound ring network protection group and the working link of the eastbound ring network protection group.
  • the method further includes:
  • TMS OAM Multi-Protocol Label Switched Channel Layer Operation Management and Maintenance
  • the method further includes:
  • the service traffic is switched to the protection link of the westbound ring network protection group, and the service traffic goes westward.
  • the protection link of the ring protection group and the effective link of the east ring protection group are the protection link of the ring protection group and the effective link of the east ring protection group.
  • the method further includes:
  • the service traffic is switched to the protection link of the eastbound ring network protection group, and the service is The traffic goes west to the effective link of the ring protection group and the protection link of the east ring protection group.
  • the method further includes:
  • the method further includes: When the working link of the eastbound ring network protection group is restored, or the eastbound ring network protection group performs a forced switchback, the service traffic is switched to the working link of the eastbound ring network protection group, and the service The traffic goes west to the effective link of the ring protection group and the working link of the east ring protection group.
  • the invention also provides a intersecting tangent ring network protection system, the system comprising:
  • a bidirectional tunnel configuration module configured to: configure a bidirectional working tunnel on an intersecting or tangent node of the cross-ring protection
  • the ring network protection module is configured to: establish a ring network protection group in each direction of the working tunnel.
  • the ring network protection module is configured to: establish, for the double-ring intersecting or tangent node, a westbound ring network protection group and an eastbound ring network protection group in the west direction and the east direction of the working tunnel respectively;
  • the ring network protection module is further configured to: and configure the service traffic after the completion of the networking to default to the working link of the westbound ring network protection group and the working link of the eastbound ring network protection group.
  • the ring network protection module is further configured to enable TMS OAM detection in both the direction of the working link and the direction of the protection link.
  • the ring network protection module is further configured to: when the working link of the westbound ring network protection group fails, or the westbound ring network protection group performs a forced handover, the service traffic is switched to the The protection link of the westbound ring network protection group, the service traffic goes west to the protection link of the ring network protection group and the effective link of the eastbound ring network protection group;
  • the service traffic is switched to the protection link of the eastbound ring network protection group, and the service is The traffic goes west to the effective link of the ring protection group and the protection link of the east ring protection group.
  • the ring network protection module is further configured to: when the working link of the westbound ring network protection group is restored, or when the westbound ring network protection group performs forced failback, the service traffic is switched to the The working link of the westbound ring network protection group, the service traffic goes west to the working link of the ring network protection group and the effective link of the eastbound ring network protection group;
  • FIG. 1a shows a networking scenario of a two-way intersecting ring network protection according to the present invention
  • Figure lb shows a networking scenario of a bidirectional tangential ring network protection according to the present invention. a path diagram; a path diagram;
  • FIG. 3a is a flow forwarding path diagram of a two-ring intersecting ring network protection scenario 1 according to the present invention
  • FIG. 3b is a flow forwarding path diagram of a two-ring tangential ring network protection scenario 1 according to the present invention
  • FIG. 4b shows a traffic forwarding path diagram of the two-ring tangential ring network protection scenario 2 according to the present invention
  • FIG. 4b shows a traffic forwarding path diagram of the two-ring tangential ring network protection scenario 2 according to the present invention
  • FIG. 5b illustrates a traffic forwarding path diagram of a two-ring tangential ring network protection scenario 3 according to the present invention
  • FIG. 6a illustrates a traffic forwarding path diagram of a two-ring tangential ring network protection scenario 3 according to the present invention
  • Figure 2b shows a traffic forwarding path diagram of a four-ring tangential ring network protection scenario 4 in accordance with the present invention
  • Figure 7 illustrates a flow forwarding path diagram of a two-ring tangential ring network protection scenario 4 in accordance with the present invention
  • the core problem solved by the present invention is: In the case of intersecting tangent ring interconnection protection, if the working links on the intersecting tangent nodes are both invalid, how to perform the switching protection.
  • the embodiment of the present invention proposes a method for protecting and intersecting a tangent ring network, and performing service exchange processing by two mutually independent ring protection tunnels.
  • a bidirectional working tunnel is configured at the intersecting or tangent node of the cross-ring protection, and a ring network protection group is established in each direction of the working tunnel.
  • a westbound ring network protection group and an eastbound ring network protection group are respectively established in the west and east directions of the working tunnel;
  • the service traffic goes to the working link of the westbound ring network protection group and the working link of the eastbound ring network protection group.
  • TMS OAM detection is also required in the direction of the working link (also referred to as the working direction) and the direction of the protection link (also referred to as the protection direction), and is used to detect whether the connectivity of each segment in the ring network is good.
  • the service traffic is switched to the protection link of the westbound ring network protection group, and the service traffic is Take the protection link of the westbound ring network protection group and the effective link of the eastbound ring network protection group.
  • the effective link in this document refers to the current effective service transmission path, which can be a working link or a protection link.
  • the service traffic is switched to the protection link of the eastbound ring network protection group, and the service is The traffic goes west to the effective link of the ring protection group and the protection link of the east ring protection group.
  • the service traffic is switched to the working link of the westbound ring network protection group.
  • the service traffic goes to the working link of the ring protection group and the effective link of the east ring protection group.
  • the service traffic is switched to the work of the eastbound ring network protection group. On the link, the service traffic goes to the active link of the ring protection group and the working link of the east ring protection group.
  • FIG. 1 the networking scenario of the two-way intersecting and tangential ring network protection is shown in Figure la and Figure lb.
  • the two ring-connected and tangent P devices are configured with two ring network protection groups, which are located in the east direction. In the East Ring and West Ring, the protection tunnels of the two ring protection groups are not the same protection tunnel.
  • the other devices in Figure 1 are deployed in the normal single-ring configuration.
  • Figure 2 shows the traffic forwarding path in the initial state of the bidirectional intersecting and tangential ring network protection group. See Figure 2, where the solid line is the working path through which the current traffic is forwarded. In the initial state, it is: Bidirectional B ⁇ - >A ⁇ - >P ⁇ - >AA ⁇ - >BB; The dotted line is the protection path with no traffic, and the east and west protection links are both closed and closed links.
  • the westward protection link path is B ⁇ -- > C ⁇ > D ⁇ > E ⁇ > P ⁇ > A ⁇ >B;
  • the eastbound protection link path is BB ⁇ > CC ⁇ ⁇ > DD ⁇ > E ⁇ > P ⁇ > AA ⁇ --> BB.
  • the westward protection link path is B ⁇ --> C ⁇ > D ⁇ > E ⁇ > P ⁇ > A ⁇ >B;
  • the eastward protection link path is BB ⁇ > CC ⁇ ⁇ > DD ⁇ > EE ⁇ > P ⁇ > AA ⁇ - -> BB.
  • Step 1 The initial state of the two-way intersecting and tangential ring network protection group, and the service traffic goes to the working link of the East ring protection group and the working link of the West ring protection group;
  • Step 2 The working link protected by the West ring fails, that is, the west TMS has a loc alarm.
  • the West ring protection group performs a forced switchover, and then switches traffic to the protection link of the West ring protection group. At this time, the service traffic passes the protection link of the West ring protection group and the East ring. The working link of the protection group;
  • the loc alarm can be detected by the TMS OAM.
  • a device periodically sends packets to the peer device according to the configured period of the user, and then detects whether the connectivity of the two devices is normal.
  • Step 3 On the basis of step 2, the working link of the East ring protection group is faulty (that is, there is a loc alarm in the east TMS), or the forced ring switching is performed by the East ring protection group, and the traffic is switched to the protection of the East ring protection group. Link, at this time, the traffic flows the protection chain of the West ring protection group. Protection link for the road and the East ring protection group;
  • Step 4 On the basis of step 3, the West ring protection group works link recovery (that is, the west TMS loc alarm recovery), or the West ring protection group performs a forced switchback, and the traffic is switched to the work chain of the West ring protection group.
  • the service traffic of the West ring protection group and the protection link of the East ring protection group are taken at this time;
  • Step 5 On the basis of step 4, the working link of the East ring protection group is restored (that is, the east TMS loc alarm is restored), or the East ring protection group performs a forced switchback, and the traffic is switched to the work of the East ring protection group. Link, at this time, the service traffic goes to the working link of the West ring protection group and the working link of the East ring protection group;
  • the scenario is as follows: The working link of the West ring protection is faulty (that is, the west TMS has a loc alarm), or the West ring protection group performs a forced handover.
  • FIG. 3 shows the flow forwarding path diagram of the two-way intersecting and tangential ring network protection group in this scenario.
  • the service path is bidirectional B ⁇ ->A ⁇ -> B ⁇ ->C ⁇ -> D ⁇ ⁇ >E ⁇ >P ⁇ --> AA ⁇ - -> BB.
  • the scenario is specifically as follows: On the basis of the foregoing scenario 1, the working link of the East ring protection group is faulty (that is, the east TMS has a loc alarm), or the East ring protection group performs a forced handover.
  • the traffic is switched to the protection link of the East ring protection group.
  • the service traffic is taken along the protection link of the West ring protection group and the protection link of the East ring protection group.
  • Figure 4a shows the traffic forwarding path of the two-way intersecting ring network protection group in the scenario 2, where the service path is B ⁇ ->A ⁇ >B ⁇ >C ⁇ >D ⁇ >E ⁇ >P ⁇ >E ⁇ >DD ⁇ >CC ⁇ >BB ⁇ >AA ⁇ >BB.
  • Figure 4b shows the traffic forwarding path of the bidirectional tangential ring network protection group in this scenario, which is: B ⁇ ->A ⁇ >B ⁇ >C ⁇ >D ⁇ >E ⁇ >P ⁇ ⁇ >EE ⁇ >DD ⁇ >CC ⁇ >BB ⁇ >AA ⁇ > BB.
  • the scenario is specifically as follows: On the basis of scenario 2 above, the West ring protection group works link recovery.
  • FIG. 5a shows the traffic forwarding path of the two-way intersecting ring network protection group in the scenario three.
  • the service path is bidirectional B ⁇ --> A ⁇ >P ⁇ >E ⁇ --> DD ⁇ - - ⁇ CC ⁇ --> BB ⁇ --> AA ⁇ - -> BB.
  • Figure 5b shows the traffic forwarding path of the bidirectional tangential ring network protection group in the scenario 3, where the service path is B ⁇ --> A ⁇ ⁇ > p ⁇ --> EE ⁇ --> DD ⁇ - -> CC ⁇ - -> BB ⁇ - -> AA ⁇ --> BB.
  • the scenario is specifically as follows: On the basis of the foregoing scenario 3, the working link recovery of the East ring protection group (ie, the east TMS loc alarm recovery), or the East ring protection group performs a forced failback.
  • the working link recovery of the East ring protection group ie, the east TMS loc alarm recovery
  • the East ring protection group performs a forced failback.
  • Figure 5 shows the traffic forwarding path diagram of the bidirectional intersecting and tangential ring network protection group in the scenario 4.
  • the service path is bidirectional B ⁇ >A ⁇ >P ⁇ >AA ⁇ ⁇ >BB.
  • the bidirectional protection method for intersecting and tangential ring network protection provided by the embodiment of the present invention
  • the main steps are as follows:
  • Step A Set up a TMPLS network.
  • the networking diagram can be seen in Figure 1.
  • the working tunnels configured on the intersecting and tangent node P devices must span two rings and be bidirectional. The corresponding ring is used in each direction of the working tunnel.
  • To protect establish a ring network protection group and TMS-OAM-enabled TMS detection; the remaining devices configure the ring network protection group and TMPLS-OAM TMS detection according to the networking conditions, and the network formation is completed.
  • the ring protection group in one direction is the west-ring ring protection group, and the other direction is the east-direction ring network protection group.
  • the traffic flows westward to the ring network.
  • Step B If the working link protected by the westbound ring network fails (that is, there is a loc alarm in the westward TMS), or if the westbound ring network protection group performs a forced switching, the traffic is switched to the protection link of the westbound ring network protection group.
  • the service traffic goes west to the protection link of the ring network protection group and the working link of the east ring network protection group.
  • Step C On the basis of step B, when the working link of the eastbound ring network protection group fails (that is, there is a loc alarm in the eastward TMS), or when the eastbound ring network protection group performs a forced switching, the traffic is switched to The protection link of the eastbound ring network protection group goes to the protection link of the ring network protection group and the protection link of the eastbound ring network protection group.
  • Step D On the basis of the step C, when the working link of the westbound ring network protection group is restored (that is, the westward TMS loc alarm is restored), or when the westbound ring network protection group performs the forced switchback, the traffic is switched to the westbound ring network protection.
  • the working link of the group at this time, the service traffic goes west to the working link of the ring network protection group and the protection link of the east ring ring network protection group.
  • Step E On the basis of step D, when the working link of the eastbound ring network protection group is restored (that is, the eastward TMS loc alarm recovery), or the eastbound ring network protection group performs a forced switchback, the traffic is switched to The working link of the eastbound ring network protection group. At this time, the service traffic goes west to the working link of the ring network protection group and the working link of the eastbound ring network protection group.
  • Step F After the above switching, various switching scenarios of two-way intersection and tangent ring network protection have been completed, and the state of the network formation is restored.
  • the embodiment of the present invention further provides a intersecting tangent ring network protection system, where the system mainly includes:
  • the bidirectional tunnel configuration module is configured to configure a bidirectional working tunnel on the intersecting or tangent node of the cross-ring protection
  • the ring network protection module is configured to establish a ring network protection group in each direction of the working tunnel.
  • the ring network protection module is configured to establish a westward ring network protection group and an east direction ring network protection group in the west and east directions of the working tunnel for the double ring intersecting or tangent nodes;
  • the service traffic of the westbound ring network protection group and the working link of the eastbound ring network protection group are taken by default.
  • the ring network protection module is further configured to enable TMS OAM detection in both the direction of the working link and the direction of the protection link.
  • the ring network protection module is further configured to: when the working link of the westbound ring network protection group fails, or the westbound ring network protection group performs a forced handover, the service traffic is switched to the The protection link of the westbound ring network protection group, the service traffic goes west to the protection link of the ring network protection group and the effective link of the eastbound ring network protection group;
  • the service traffic is switched to the protection link of the eastbound ring network protection group, and the service is The traffic goes west to the effective link of the ring protection group and the protection link of the east ring protection group.
  • the ring network protection module is further configured to: when the working link of the westbound ring network protection group is restored, or when the westbound ring network protection group performs forced failback, the service traffic is switched to the The working link of the westbound ring network protection group, the service traffic goes west to the working link of the ring network protection group and the effective link of the eastbound ring network protection group;
  • the service traffic is switched to the working link of the eastbound ring network protection group, and the service The traffic goes west to the effective link of the ring protection group and the working link of the east ring protection group.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any particular combination of hardware and software.
  • the above two-way protection method based on T-MPLS intersecting and tangent ring network protection protects the interconnection links on the double-ring intersection and tangent nodes.
  • the interconnect link fails, the end-to-end protection of the cross-ring service is implemented, and the protection switching time is not more than 50 ms.

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

Abstract

L'invention concerne un procédé et un système pour la protection de réseaux en anneaux tangents ou sécants. Au niveau d'un nœud sécant ou tangent soumis à une protection en anneaux croisés, un tunnel de travail bidirectionnel est configuré ; un groupe de protection de réseau en anneaux est établi séparément dans chaque direction du tunnel de travail ; dans les directions à la fois d'une liaison de travail bidirectionnelle et d'une liaison de protection, une détection d'OAM TMS est activée. Par l'adoption du procédé de protection bidirectionnelle reposant sur une protection de réseaux en anneaux sécants ou tangents T-MPLS de l'invention, une liaison interconnectée sur un nœud sécant ou tangent en anneaux doubles peut être protégée ; lorsque la liaison interconnectée a une panne, une protection de bout en bout pour un service en anneaux croisés est mise en œuvre et le temps de commutation de protection est garanti comme n'étant pas supérieur à 50 ms.
PCT/CN2011/080734 2010-12-17 2011-10-13 Procédé et système pour la protection de réseaux en anneaux tangents ou sécants WO2012079418A1 (fr)

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CN201010594045.8 2010-12-17
CN201010594045.8A CN102035714B (zh) 2010-12-17 2010-12-17 一种相交相切环网保护方法及系统

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CN102035714B (zh) * 2010-12-17 2016-03-30 中兴通讯股份有限公司 一种相交相切环网保护方法及系统
CN102868620B (zh) * 2011-07-06 2018-07-06 中兴通讯股份有限公司 跨环业务保护方法及装置
CN102291310B (zh) * 2011-08-24 2017-04-26 中兴通讯股份有限公司 一种提高t‑mpls链路环网保护切换性能的方法及装置
CN102315987B (zh) * 2011-09-13 2017-05-10 中兴通讯股份有限公司 环网保护组链路回切方法及装置
CN103209088B (zh) 2012-01-17 2016-12-28 华为技术有限公司 环网标签交换路径创建方法及相关设备和通信系统
CN102546425B (zh) 2012-01-31 2014-11-05 华为技术有限公司 相交环保护方法、设备和系统
CN105207871B (zh) * 2014-06-25 2020-07-31 南京中兴软件有限责任公司 双切环网保护方法及装置
CN104135392A (zh) * 2014-08-19 2014-11-05 烽火通信科技股份有限公司 一种双节点环路由oam数据的保护方法
CN109495286B (zh) * 2017-09-13 2021-11-12 中兴通讯股份有限公司 相交环复用段告警检测方法及装置、计算机可读存储介质

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