WO2012079418A1 - Method and system for intersecting or tangent ring network protection - Google Patents

Method and system for intersecting or tangent ring network protection 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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WIPO (PCT)
Prior art keywords
ring network
protection group
link
ring
network protection
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PCT/CN2011/080734
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French (fr)
Chinese (zh)
Inventor
郭平
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中兴通讯股份有限公司
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Publication of WO2012079418A1 publication Critical patent/WO2012079418A1/en

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    • 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)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Disclosed are a method and a system for intersecting or tangent ring network protection. At an intersecting or tangent node subject to cross-ring protection, a bidirectional working tunnel is configured; a ring network protection group is separately established in each direction of the working tunnel; in directions of both a bidirectional working link and a protection link, TMS OAM detection is enabled. By adopting the bidirectional protection method based on T-MPLS intersecting or tangent ring network protection of the present invention, an interconnected link on a dual-ring intersecting or tangent node may be protected; when the interconnected link has a fault, end-to-end protection for a cross-ring service is implemented, and protection switching time is ensured to be not greater than 50 ms.

Description

一种相交相切环网保护方法及***  Method and system for protecting intersecting tangent ring network
技术领域 Technical field
本发明涉及分组传送网络环网保护技术领域， 尤其涉及一种相交相切环 网保护方法及***。  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.
背景技术 Background technique
随着分组传送网络的逐步普及和应用， 用户对网络可靠性的需求也越来 越高。 为了提高网络的生存性， 网络的保护机制是必不可少的。 传送多协议 标签交换（ Transport-Multi Protocol Label Switching, T-MPLS )保护主要有线 性保护和环网保护。 环网保护倒换技术优势主要有： 属于段层保护， 节省大 量标签交换路径（Label Switched Path, LSP )条目数和配置工作量； 无需每 条 LSP 3.3ms间隔的开销帧， 大幅提高业务通道的传送带宽。  With the gradual popularization and application of packet transmission networks, users' demand for network reliability is also increasing. In order to improve the survivability of the network, the network protection mechanism is indispensable. Transport-Multi Protocol Label Switching (T-MPLS) protects primary cable protection and ring network protection. The advantages of the ring network protection switching technology are as follows: Segment layer protection, saving a large number of Label Switched Path (LSP) entries and configuration workload; eliminating the need for overhead frames of 3.3 ms interval per LSP, greatly improving the transmission of service channels bandwidth.
在分组传送网络中， 业务通常是需要跨环保护， 如图 la所示为双环相交 保护， 图 lb所示为相切保护。 在双环互联保护中， 对于除了相交、 相切节点 以外的其它故障， 仍釆用与单环相同的环网保护机制， 保护机制在两个环中 应独立工作， 互不干 ·ί尤。 目前， 绝大部分设备都只实现了在单环保护， 对于在相交、 相切节点上 的互联工作链路都失效的情况下， 流量将会中断， 影响业务的正常运行。 由 于切换和保护组维护的复杂性， 目前很少有产品支持这种应用场景， 而是用 环网叠加线性共同实现链路保护， 以尽可能保证业务不中断。 但釆用这种环 网叠加线性方式时， 如图 2所示， 在节点 Β和 ΒΒ需要增加线性保护组和线 性保护隧道的配置、 以及增加线性工作隧道和线性保护隧道 T-MPLS通道层 ( T-MPLS Path , TMP ) 操作管理和维护 （Operation Administration and Maintenance, OAM )检测， 因此浪费传送带宽。 另夕卜， 在保护链路方向的各 个节点（如图 2a中的节点：8、 C、 D、 E、 DD、 CC、 BB )都需要配置线性保 护隧道， 用于线性保护隧道标签交换， 因此， 需要增加大量的配置工作量。 发明内容 In a packet transport network, services usually require cross-ring protection, as shown in Figure la for double-ring intersection protection, and Figure lb shows tangent protection. In the dual-ring interconnection protection, the same ring network protection mechanism as the single ring is used for faults other than the intersecting and tangent nodes. The protection mechanism should work independently in the two rings, and do not work together. At present, most devices only implement single-ring protection. When the interconnected working links on intersecting and tangent nodes fail, traffic will be interrupted, affecting the normal operation of the service. Due to the complexity of switching and protection group maintenance, few products support this kind of application scenario. Instead, the ring network is superimposed linearly to implement link protection to ensure uninterrupted service as much as possible. However, when this ring network is superimposed linearly, as shown in Fig. 2, it is necessary to increase the configuration of the linear protection group and the linear protection tunnel at the nodes ΒΒ and 、, and to increase the linear working tunnel and the linear protection tunnel T-MPLS channel layer ( T-MPLS Path (TMP) Operation Management and Maintenance (OAM) detection wastes transmission bandwidth. In addition, each node in the direction of the protection link (such as the nodes in FIG. 2a: 8, C, D, E, DD, CC, BB) needs to be configured with a linear protection tunnel for linear protection tunnel label switching, so , need to increase the amount of configuration work. Summary of the invention
本发明解决的技术问题是提供一种相交相切环网保护方法及***， 保护 双环相交、 相切节点上的互联链路。  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.
为解决上述技术问题， 本发明提供了一种相交相切环网保护方法， 在跨环保护的相交或相切节点配置双向工作隧道， 并在所述工作隧道的 每个方向分别建立环网保护组。  In order to solve the above technical problem, 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.
可选的， 在所述工作隧道的每个方向分别建立环网保护组的步骤包括： 对于双环相交或相切节点， 在所述工作隧道的西向和东向分别建立西向环网 保护组和东向环网保护组；  Optionally, 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;
所述方法还包括： 在完成组网后， 业务流量走所述西向环网保护组的工 作链路和所述东向环网保护组的工作链路。  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.
可选的， 所述方法还包括：  Optionally, the method further includes:
在所述工作链路的方向和保护链路的方向都启用传送多协议标签交换通 道层操作管理和维护 （TMS OAM )检测。  Transmit Multi-Protocol Label Switched Channel Layer Operation Management and Maintenance (TMS OAM) detection is enabled in both the direction of the working link and the direction of the protection link.
可选的， 所述方法还包括：  Optionally, the method further includes:
当所述西向环网保护组的工作链路出现故障、 或者所述西向环网保护组 执行了强制切换时， 将业务流量切换到所述西向环网保护组的保护链路， 业 务流量走西向环网保护组的保护链路和东向环网保护组的有效链路。  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 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.
可选的， 所述方法还包括：  Optionally, the method further includes:
当所述东向环网保护组的工作链路出现故障、 或者所述东向环网保护组 执行了强制切换时， 将业务流量切换到所述东向环网保护组的保护链路， 业 务流量走西向环网保护组的有效链路和东向环网保护组的保护链路。  When the working link of the eastbound ring network protection group fails, or the eastbound ring network protection group performs a forced handover, 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.
可选的， 所述方法还包括：  Optionally, the method further includes:
当所述西向环网保护组的工作链路恢复， 或所述西向环网保护组执行了 强制回切时， 将业务流量切换到所述西向环网保护组的工作链路， 业务流量 走西向环网保护组的工作链路和东向环网保护组的有效链路。  When the working link of the westbound ring network protection group is restored, or the westbound ring network protection group performs a forced switchback, the service traffic is switched to the working link of the westbound ring network protection group, and the service traffic goes westward. The working link of the ring protection group and the effective link of the east ring protection group.
可选的， 所述方法还包括： 当所述东向环网保护组的工作链路恢复， 或所述东向环网保护组执行了 强制回切时， 将业务流量切换到所述东向环网保护组的工作链路， 业务流量 走西向环网保护组的有效链路和东向环网保护组的工作链路。 Optionally, 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.
本发明还提供了一种相交相切环网保护***， 所述***包括：  The invention also provides a intersecting tangent ring network protection system, the system comprising:
双向隧道配置模块， 其设置为： 在跨环保护的相交或相切节点上配置双 向工作隧道； 以及  a bidirectional tunnel configuration module, configured to: configure a bidirectional working tunnel on an intersecting or tangent node of the cross-ring protection;
环网保护模块， 其设置为： 在所述工作隧道的每个方向分别建立环网保 护组。  The ring network protection module is configured to: establish a ring network protection group in each direction of the working tunnel.
可选的， 所述环网保护模块是设置为： 对于双环相交或相切节点， 在所 述工作隧道的西向和东向分别建立西向环网保护组和东向环网保护组；  Optionally, 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;
所述环网保护模块还设置为： 并配置完成组网后的业务流量默认走所述 西向环网保护组的工作链路和所述东向环网保护组的工作链路。  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.
可选的， 所述环网保护模块还用于， 在所述工作链路的方向和保护链路 的方向都启用 TMS OAM检测。  Optionally, 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.
可选的， 所述环网保护模块还设置为： 当所述西向环网保护组的工作链 路出现故障、 或者所述西向环网保护组执行了强制切换时， 将业务流量切换 到所述西向环网保护组的保护链路， 业务流量走西向环网保护组的保护链路 和东向环网保护组的有效链路；  Optionally, 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;
当所述东向环网保护组的工作链路出现故障、 或者所述东向环网保护组 执行了强制切换时， 将业务流量切换到所述东向环网保护组的保护链路， 业 务流量走西向环网保护组的有效链路和东向环网保护组的保护链路。  When the working link of the eastbound ring network protection group fails, or the eastbound ring network protection group performs a forced handover, 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.
可选的， 所述环网保护模块还设置为： 当所述西向环网保护组的工作链 路恢复， 或所述西向环网保护组执行了强制回切时， 将业务流量切换到所述 西向环网保护组的工作链路， 业务流量走西向环网保护组的工作链路和东向 环网保护组的有效链路；  Optionally, 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;
当所述东向环网保护组的工作链路恢复， 或所述东向环网保护组执行了 强制回切时， 将业务流量切换到所述东向环网保护组的工作链路， 业务流量 走西向环网保护组的有效链路和东向环网保护组的工作链路。 上述基于 T-MPLS相交、相切环网保护的双向保护方法， 保护双环相交、 相切节点上的互联链路。 在互联链路出现故障时， 实现跨环业务端到端的保 护， 并保证了保护倒换时间不大于 50ms。 附图概述 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 above two-way protection method based on T-MPLS intersecting and tangent ring network protection protects the interconnected links on the intersecting and tangent nodes of the double loop. When 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. BRIEF abstract
此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中：  The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. In the drawing:
图 1 a示出了依据本发明的双向相交环网保护的组网场景；  1a shows a networking scenario of a two-way intersecting ring network protection according to the present invention;
图 lb示出了依据本发明的双向相切环网保护的组网场景； 径图； 径图；  Figure lb shows a networking scenario of a bidirectional tangential ring network protection according to the present invention; a path diagram; a path diagram;
图 3a示出了依据本发明的两环相交环网保护场景一的流量转发路径图； 图 3b示出了依据本发明的两环相切环网保护场景一的流量转发路径图； 图 4a示出了依据本发明的两环相交环网保护场景二的流量转发路径图； 图 4b示出了依据本发明的两环相切环网保护场景二的流量转发路径图； 图 5a示出了依据本发明的两环相交环网保护场景三的流量转发路径图； 图 5b示出了依据本发明的两环相切环网保护场景三的流量转发路径图； 图 6a示出了依据本发明的两环相交环网保护场景四的流量转发路径图； 图 6b示出了依据本发明的两环相切环网保护场景四的流量转发路径图； 图 7示出了描述了依据本发明实施例的两环相交、 相切环网保护的处理 流程。 本发明的较佳实施方式  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 process of two-ring intersection and tangent ring network protection. Preferred embodiment of the invention
以下将结合附图及具体实施例对本发明的实施方式作进一步详细描述。 需要说明的是， 在不冲突的情况下， 本申请中的实施例及实施例中的特征可 以相互任意组合。 The embodiments of the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
本发明解决的核心问题为： 在相交相切环互联保护中， 相交相切节点上 的工作链路都失效的情况下， 如何进行倒换保护。 为解决该技术问题， 本发 明实施方式提出一种相交相切环网保护换方法， 通过双向的两个相互独立的 环网保护隧道进行业务相互交换处理。 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. In order to solve the technical problem, 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.
上述相交相切环网保护方法， 釆用如下技术方案：  The above-mentioned intersecting tangent ring network protection method uses the following technical solutions:
在跨环保护的相交或相切节点配置双向工作隧道， 并在所述工作隧道的 每个方向分别建立环网保护组。  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.
其中， 对于双环相交或相切节点， 在所述工作隧道的西向和东向分别建 立西向环网保护组和东向环网保护组；  Wherein, for the double-ring intersecting or tangent node, 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;
在完成组网后， 业务流量走所述西向环网保护组的工作链路和所述东向 环网保护组的工作链路。  After the networking is completed, 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.
此外， 还需在所述工作链路的方向 （也称为工作方向）和保护链路的方 向 （也称为保护方向）都启用 TMS OAM检测， 用于检测环网中各个段层连 通性是否良好。  In addition, 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.
其中， 当所述西向环网保护组的工作链路出现故障、 或者所述西向环网 保护组执行了强制切换时， 将业务流量切换到所述西向环网保护组的保护链 路，业务流量走西向环网保护组的保护链路和东向环网保护组的有效链路（本 文中的有效链路是指当前的业务有效传送路径， 可以是工作链路， 也可以是 保护链路） 。  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 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.) .
当所述东向环网保护组的工作链路出现故障、 或者所述东向环网保护组 执行了强制切换时， 将业务流量切换到所述东向环网保护组的保护链路， 业 务流量走西向环网保护组的有效链路和东向环网保护组的保护链路。  When the working link of the eastbound ring network protection group fails, or the eastbound ring network protection group performs a forced handover, 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.
较佳的， 当所述西向环网保护组的工作链路恢复， 或所述西向环网保护 组执行了强制回切时， 将业务流量切换到所述西向环网保护组的工作链路， 业务流量走西向环网保护组的工作链路和东向环网保护组的有效链路。 较佳的， 当所述东向环网保护组的工作链路恢复， 或所述东向环网保护 组执行了强制回切时， 将业务流量切换到所述东向环网保护组的工作链路， 业务流量走西向环网保护组的有效链路和东向环网保护组的工作链路。 Preferably, when the working link of the westbound ring network protection group is restored, or the westbound ring network protection group performs a forced switchback, 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. Preferably, 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 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.
如图 1所示为双向相交、相切环网保护的组网场景，请参见图 la和图 lb, 其中两环相交、相切的 P设备配置了两个环网保护组，分别位于东向环网（ East ring ) 、 西向环网 （West ring ) 中， 两个环网保护组的保护隧道不是同一个保 护隧道。 图 1中的其他设备则按照正常的单环配置组网。 As shown in Figure 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.
图 2示出了双向相交、 相切环网保护组初始状态下的流量转发路径图， 请参见图 2, 其中实线部分为当前流量转发经过的工作路径， 初始状态下为： 双向 B< - >A< - >P< - >AA< - >BB; 虚线部分为没有流量的保护路径， 东、 西 向保护链路都是双向一个闭环链路。 图 2a 中， 西向保护链路路径是 B< -- > C<~> D<~> E<~> P<~> A<― >B;东向保护链路路径是 BB<~> CC<~> DD<~> E<~> P<~> AA< --〉 BB。 图 2b中， 西向保护链路路径是 B< --〉 C<~> D<~> E<~> P<~> A<~>B; 东向保护链路路径是 BB<~> CC<~> DD<~> EE<~> P<~> AA〈- -〉 BB。  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. In Figure 2a, 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. In Figure 2b, 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.
本发明实施例的相交相切环网保护流程主要包括以下步骤：  The intersecting tangent ring network protection process in the embodiment of the present invention mainly includes the following steps:
步骤 1 , 双向相交、 相切环网保护组初始状态， 业务流量走 East ring保 护组的工作链路和 West ring保护组的工作链路；  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;
步骤 2, West ring保护的工作链路出现故障， 即 west TMS存在 loc告警 Step 2: The working link protected by the West ring fails, that is, the west TMS has a loc alarm.
( loss of continuity, 连通性丟失） , 或 West ring保护组执行了强制切换， 则 将流量切换到 West ring保护组的保护链路， 此时业务流量走 West ring保护 组的保护链路和 East ring保护组的工作链路； (loss of continuity), or 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;
其中， loc告警具体可通过 TMS OAM检测出， 例如一台设备按照用户配 置的周期定时发送报文给对端设备， 进而检测两台设备的连通性是否正常。  The loc alarm can be detected by the TMS OAM. For example, 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.
步骤 3 , 在步骤 2的基础上， East ring保护组的工作链路出现故障 （即 east TMS存在 loc告警） ， 或 East ring保护组执行了强制切换， 则将流量切 换到 East ring保护组的保护链路， 此时业务流量走 West ring保护组的保护链 路和 East ring保护组的保护链路； 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;
步骤 4,在步骤 3的基础上， West ring保护组工作链路恢复（即 west TMS loc告警恢复），或 West ring保护组执行了强制回切，则将流量切换到 West ring 保护组的工作链路， 此时业务流量走 West ring保护组的工作链路和 East ring 保护组的保护链路；  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;
步骤 5 ,在步骤 4的基础上， East ring保护组的工作链路恢复（即 east TMS loc告警恢复 ) ,或 East ring保护组执行了强制回切，则将流量切换到 East ring 保护组的工作链路， 此时业务流量走 West ring保护组的工作链路和 East ring 保护组的工作链路；  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;
可以看出， 经过上述流程， 已经完成了相交、 相切的 P ( Provider, 服务 提供设备）设备双向环网保护保护的各种切换场景， 并恢复到网络组建之初 的状态。 需要说明的是， 上述步骤中故障出现和恢复的顺序仅是示例性描述， 在实际应用中， 西向和东向的故障出现和恢复并无一定的先后顺序。 即， 其 他一些情况， 例如， 先东向故障， 后西向故障； 或者， 先西向故障， 然后西 向恢复； 以及， 先西向故障， 后东向故障， 然后东向恢复， 再是西向恢复即， 先是西向故障， 再是东向故障， 等， 这些情况均有可能。  It can be seen that, after the foregoing process, various switching scenarios of the intersecting and tangential P (Provider, Service Providing Device) device bidirectional ring network protection protection have been completed, and the state of the network establishment is restored. It should be noted that the order of occurrence and recovery of faults in the above steps is merely an exemplary description. In practical applications, there is no certain order of occurrence and recovery of faults in the west and east directions. That is, other situations, for example, eastward failure, backward westward failure; or, westward failure, then westward recovery; and, westward failure, eastward failure, then eastward recovery, then westward recovery, first Westward failures, eastward failures, etc., are all possible.
下面将结合几个具体应用场景对本发明的环网保护方法进行详细介绍。 场景一 The ring network protection method of the present invention will be described in detail below in combination with several specific application scenarios. scene one
该场景具体为： West ring保护的工作链路出现故障 （即 west TMS存在 loc告警） ， 或 West ring保护组执行了强制切换。  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.
该场景一下， 将流量切换到 West ring保护组的保护链路， 此时业务流量 走 West ring保护组的保护链路和 East ring保护组的工作链路。 图 3示出了双 向相交、 相切环网保护组在该场景一下的流量转发路径图， 此时业务路径为 双向 B〈― >A< --〉 B〈― >C< --〉 D〈― >E<― >P< --〉 AA〈- -〉 BB。  In this scenario, the traffic is switched to the protection link of the West ring protection group. At this time, the service traffic goes to the protection link of the West ring protection group and the working link of the East ring protection group. Figure 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.
场景二  Scene two
该场景具体为： 在上述场景一的基础上， East ring保护组的工作链路出 现故障 （即 east TMS存在 loc告警） ， 或 East ring保护组执行了强制切换。 该场景二下， 则将流量切换到 East ring保护组的保护链路， 此时业务流 量走 West ring保护组的保护链路和 East ring保护组的保护链路。 图 4a示出 了双向相交环网保护组在该场景二下的流量转发路径图， 此时业务路径为 B<->A<~>B<~>C<~>D<~>E<~>P<~>E<~>DD<~>CC<~>BB<~>AA<~>B B。 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. In the scenario 2, 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.
图 4b 示出了双向相切环网保护组在该场景下的流量转发路径图， 为： B<->A<~>B<~>C<~>D<~>E<~>P<~>EE<~>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.
场景三  Scene three
该场景具体为： 在上述场景二的基础上， West ring保护组工作链路恢复 The scenario is specifically as follows: On the basis of scenario 2 above, the West ring protection group works link recovery.
(即 west TMS loc告警恢复） ， 或 West ring保护组执行了强制回切。 (ie, west TMS loc alarm recovery), or the West ring protection group performs a forced failback.
该场景三下， 则将流量切换到 West ring保护组的工作链路， 此时业务流 量走 West ring保护组的工作链路和 East ring保护组的保护链路。 图 5a示出 了双向相交环网保护组在该场景三下的流量转发路径图， 此时业务路径为双 向 B< --〉 A〈― >P<― >E< --〉 DD〈- -〉 CC< --〉 BB< --〉 AA〈- -〉 BB。  In the scenario of the scenario, the traffic is switched to the working link of the West ring protection group. The traffic of the West ring protection group and the protection link of the East ring protection group are taken. Figure 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.
图 5b示出了双向相切环网保护组在该场景三下的流量转发路径图，此时 业务路径为 B< --〉 A〈― >p< --〉 EE< --〉 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.
场景四  Scene four
该场景具体为： 在上述场景三的基础上， East ring保护组的工作链路恢 复（即 east TMS loc告警恢复） ， 或 East ring保护组执行了强制回切。  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.
该场景四下， 则将流量切换到 East ring保护组的工作链路， 此时业务流 量走 West ring保护组的工作链路和 East ring保护组的工作链路。 图 5示出了 双向相交、 相切环网保护组在该场景四下的流量转发路径图， 此时回到初始 状态， 业务路径为双向 B<― >A<― >P<― >AA<― >BB。  If the traffic is switched to the working link of the East ring protection group, the service traffic of the West ring protection group and the working link of the East ring protection group. Figure 5 shows the traffic forwarding path diagram of the bidirectional intersecting and tangential ring network protection group in the scenario 4. In this case, the service path is bidirectional B<― >A<― >P<― >AA< ― >BB.
通过以上场景描述了双向相交、 相切环网保护组各种场景下流量转发路 径的变化。  The above scenarios describe the changes in traffic forwarding paths in various scenarios of two-way intersecting and tangent ring network protection groups.
如图 7所示， 本发明实施例提供的相交、 相切环网保护的双向保护方法 的主要步骤如下： As shown in FIG. 7, 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:
步骤 A. 组建 TMPLS网络， 其组网图可参见图 1 , 在相交、 相切节点 P 设备上配置的工作隧道必须跨两个环而且是双向的， 工作隧道的每个方向分 别用对应的环来保护， 建立环网保护组和启用 TMPLS-OAM的 TMS检测； 其余设备根据组网情况配置环网保护组和 TMPLS-OAM的 TMS检测， 至此网络组建完成。  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.
对于双环相交、 相切节点的 P设备的配置， 我们假定一个方向的环网保 护组为西向环网保护组， 另一个方向为东向环网保护组， 初始情况下， 业务 流量走西向环网保护组的工作链路和东向环网保护组的工作链路。  For the configuration of P-devices with two-ring intersecting and tangent nodes, we assume that 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. In the initial case, the traffic flows westward to the ring network. The working link of the protection group and the working link of the eastbound ring network protection group.
步骤 B.西向环网保护的工作链路出现故障（即西向 TMS存在 loc告警）， 或西向环网保护组执行了强制切换， 则将流量切换到西向环网保护组的保护 链路， 此时业务流量走西向环网保护组的保护链路和东向环网保护组的工作 链路出去。  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.
步骤 C. 在步骤 B的基础上， 东向环网保护组的工作链路出现故障 （即 东向 TMS存在 loc告警） ， 或东向环网保护组执行了强制切换时， 则将流量 切换到东向环网保护组的保护链路， 此时业务流量走西向环网保护组的保护 链路和东向环网保护组的保护链路出去。  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.
步骤 D.在步骤 C的基础上，西向环网保护组工作链路恢复（即西向 TMS loc告警恢复）， 或西向环网保护组执行了强制回切时， 则将流量切换到西向 环网保护组的工作链路， 此时业务流量走西向环网保护组的工作链路和东向 环网保护组的保护链路出去。  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.
步骤 E. 在步骤 D的基础上， 东向环网保护组的工作链路恢复（即东向 TMS loc告警恢复） ， 或东向环网保护组执行了强制回切时， 则将流量切换 到东向环网保护组的工作链路， 此时业务流量走西向环网保护组的工作链路 和东向环网保护组的工作链路出去。  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.
步骤 F. 经过上述切换， 已经完成了双向相交、 相切环网保护的各种切 换场景， 并恢复到网络组建之初的状态。 此外， 本发明实施例中还提供了一种相交相切环网保护***， 该***主 要包括： 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. In addition, the embodiment of the present invention further provides a intersecting tangent ring network protection system, where the system mainly includes:
双向隧道配置模块， 设置为在跨环保护的相交或相切节点上配置双向工 作隧道；  The bidirectional tunnel configuration module is configured to configure a bidirectional working tunnel on the intersecting or tangent node of the cross-ring protection;
环网保护模块，设置为在所述工作隧道的每个方向分别建立环网保护组。 较佳的， 所述环网保护模块设置为， 对于双环相交或相切节点， 在所述 工作隧道的西向和东向分别建立西向环网保护组和东向环网保护组；  The ring network protection module is configured to establish a ring network protection group in each direction of the working tunnel. Preferably, 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;
并配置完成组网后的业务流量默认走所述西向环网保护组的工作链路和 所述东向环网保护组的工作链路。  After the service is configured, 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.
较佳的， 所述环网保护模块还设置为， 在所述工作链路的方向和保护链 路的方向都启用 TMS OAM检测。  Preferably, 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.
较佳的， 所述环网保护模块还设置为， 当所述西向环网保护组的工作链 路出现故障、 或者所述西向环网保护组执行了强制切换时， 将业务流量切换 到所述西向环网保护组的保护链路， 业务流量走西向环网保护组的保护链路 和东向环网保护组的有效链路；  Preferably, 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;
当所述东向环网保护组的工作链路出现故障、 或者所述东向环网保护组 执行了强制切换时， 将业务流量切换到所述东向环网保护组的保护链路， 业 务流量走西向环网保护组的有效链路和东向环网保护组的保护链路。  When the working link of the eastbound ring network protection group fails, or the eastbound ring network protection group performs a forced handover, 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.
较佳的， 所述环网保护模块还设置为， 当所述西向环网保护组的工作链 路恢复， 或所述西向环网保护组执行了强制回切时， 将业务流量切换到所述 西向环网保护组的工作链路， 业务流量走西向环网保护组的工作链路和东向 环网保护组的有效链路；  Preferably, 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;
当所述东向环网保护组的工作链路恢复， 或所述东向环网保护组执行了 强制回切时， 将业务流量切换到所述东向环网保护组的工作链路， 业务流量 走西向环网保护组的有效链路和东向环网保护组的工作链路。  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.
以上仅为本发明的优选实施案例而已， 并不用于限制本发明， 本发明还 可有其他多种实施例， 在不背离本发明精神及其实质的情况下， 熟悉本领域 的技术人员可根据本发明做出各种相应的改变和变形， 但这些相应的改变和 变形都应属于本发明所附的权利要求的保护范围。 The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. A person skilled in the art can make various changes and modifications in accordance with the present invention, but such corresponding changes and modifications are intended to fall within the scope of the appended claims.
显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布 在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行的程 序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 并 且在某些情况下， 可以以不同于此处的顺序执行所示出或描述的步骤， 或者 将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样， 本发明不限制于任何特定的硬件和软件 结合。  Obviously, those skilled in the art should understand that the above 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. Thus, the invention is not limited to any particular combination of hardware and software.
工业实用性 上述基于 T-MPLS相交、相切环网保护的双向保护方法， 保护双环相交、 相切节点上的互联链路。 在互联链路出现故障时， 实现跨环业务端到端的保 护， 并保证了保护倒换时间不大于 50ms。 Industrial Applicability 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. When 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.

Claims

权 利 要 求 书 Claim
1、 一种相交相切环网保护方法， 其包括：  1. A method of intersecting tangent ring network protection, comprising:
在跨环保护的相交或相切节点配置双向工作隧道， 并在所述工作隧道的 每个方向分别建立环网保护组。  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.
2、 如权利要求 1所述的方法， 其中，  2. The method of claim 1 wherein
在所述工作隧道的每个方向分别建立环网保护组的步骤包括： 对于双环 相交或相切节点， 在所述工作隧道的西向和东向分别建立西向环网保护组和 东向环网保护组；  The steps of establishing a ring network protection group in each direction of the working tunnel include: establishing a westbound ring network protection group and an east direction ring network protection for the double-ring intersecting or tangent nodes in the west and east directions of the working tunnel respectively Group
所述方法还包括： 在完成组网后， 业务流量走所述西向环网保护组的工 作链路和所述东向环网保护组的工作链路。  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.
3、 如权利要求 2所述的方法， 所述方法还包括：  3. The method of claim 2, the method further comprising:
在所述工作链路的方向和保护链路的方向都启用传送多协议标签交换通 道层操作管理和维护 （TMS OAM )检测。  Transmit Multi-Protocol Label Switched Channel Layer Operation Management and Maintenance (TMS OAM) detection is enabled in both the direction of the working link and the direction of the protection link.
4、 如权利要求 3所述的方法， 所述方法还包括：  4. The method of claim 3, the method further comprising:
当所述西向环网保护组的工作链路出现故障、 或者所述西向环网保护组 执行了强制切换时， 将业务流量切换到所述西向环网保护组的保护链路， 业 务流量走西向环网保护组的保护链路和东向环网保护组的有效链路。  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 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.
5、 如权利要求 3所述的方法， 所述方法还包括：  5. The method of claim 3, the method further comprising:
当所述东向环网保护组的工作链路出现故障、 或者所述东向环网保护组 执行了强制切换时， 将业务流量切换到所述东向环网保护组的保护链路， 业 务流量走西向环网保护组的有效链路和东向环网保护组的保护链路。  When the working link of the eastbound ring network protection group fails, or the eastbound ring network protection group performs a forced handover, 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.
6、 如权利要求 4所述的方法， 所述方法还包括：  6. The method of claim 4, the method further comprising:
当所述西向环网保护组的工作链路恢复， 或所述西向环网保护组执行了 强制回切时， 将业务流量切换到所述西向环网保护组的工作链路， 业务流量 走西向环网保护组的工作链路和东向环网保护组的有效链路。  When the working link of the westbound ring network protection group is restored, or the westbound ring network protection group performs a forced switchback, the service traffic is switched to the working link of the westbound ring network protection group, and the service traffic goes westward. The working link of the ring protection group and the effective link of the east ring protection group.
7、 如权利要求 5所述的方法， 所述方法还包括：  7. The method of claim 5, the method further comprising:
当所述东向环网保护组的工作链路恢复， 或所述东向环网保护组执行了 强制回切时， 将业务流量切换到所述东向环网保护组的工作链路， 业务流量 走西向环网保护组的有效链路和东向环网保护组的工作链路。 When the working link of the eastbound ring network protection group is restored, or the eastbound ring network protection group is executed When the switchover is performed, the service traffic is switched to the working link of the eastbound ring network protection group, and the service traffic goes west to the active link of the ring network protection group and the working link of the eastbound ring network protection group.
8、 一种相交相切环网保护***， 所述***包括：  8. A intersecting tangent ring network protection system, the system comprising:
双向隧道配置模块， 其设置为： 在跨环保护的相交或相切节点上配置双 向工作隧道； 以及  a bidirectional tunnel configuration module, configured to: configure a bidirectional working tunnel on an intersecting or tangent node of the cross-ring protection;
环网保护模块， 其设置为： 在所述工作隧道的每个方向分别建立环网保 护组。  The ring network protection module is configured to: establish a ring network protection group in each direction of the working tunnel.
9、 如权利要求 8所述的***， 其中，  9. The system of claim 8 wherein
所述环网保护模块是设置为： 对于双环相交或相切节点， 在所述工作隧 道的西向和东向分别建立西向环网保护组和东向环网保护组；  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;
所述环网保护模块还设置为： 配置完成组网后的业务流量默认走所述西 向环网保护组的工作链路和所述东向环网保护组的工作链路。  The ring network protection module is further configured to: Configuring 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.
10、 如权利要求 9所述的***， 其中，  10. The system of claim 9, wherein
所述环网保护模块还设置为： 在所述工作链路的方向和保护链路的方向 都启用传送多协议标签交换通道层操作管理和维护 （TMS OAM )检测。  The ring network protection module is further configured to: enable transport multi-protocol label switching channel layer operation management and maintenance (TMS OAM) detection in both the direction of the working link and the direction of the protection link.
11、 如权利要求 9或 10所述的***， 其中，  11. The system of claim 9 or 10, wherein
所述环网保护模块还设置为： 当所述西向环网保护组的工作链路出现故 障、 或者所述西向环网保护组执行了强制切换时， 将业务流量切换到所述西 向环网保护组的保护链路， 业务流量走西向环网保护组的保护链路和东向环 网保护组的有效链路；  The ring network protection module is further configured to: when the working link of the westbound ring network protection group fails, or when the westbound ring network protection group performs a forced handover, the service traffic is switched to the westbound ring network protection. The protection link of the group, the service traffic goes to the protection link of the ring protection group and the effective link of the east ring protection group;
当所述东向环网保护组的工作链路出现故障、 或者所述东向环网保护组 执行了强制切换时， 将业务流量切换到所述东向环网保护组的保护链路， 业 务流量走西向环网保护组的有效链路和东向环网保护组的保护链路。  When the working link of the eastbound ring network protection group fails, or the eastbound ring network protection group performs a forced handover, 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.
12、 如权利要求 9或 10所述的***， 其中，  12. The system of claim 9 or 10, wherein
所述环网保护模块还设置为： 当所述西向环网保护组的工作链路恢复， 或所述西向环网保护组执行了强制回切时， 将业务流量切换到所述西向环网 保护组的工作链路， 业务流量走西向环网保护组的工作链路和东向环网保护 组的有效链路； 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 a forced switchback, the service traffic is switched to the westbound ring network protection. The working link of the group, the service traffic goes west to the ring link protection group's working link and the eastbound ring network protection The effective link of the group;
当所述东向环网保护组的工作链路恢复， 或所述东向环网保护组执行了 强制回切时， 将业务流量切换到所述东向环网保护组的工作链路， 业务流量 走西向环网保护组的有效链路和东向环网保护组的工作链路。  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.
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