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WO2013040940A1 - Procédé et dispositif de protection de réseau en anneau - Google Patents

Procédé et dispositif de protection de réseau en anneau Download PDF

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Publication number
WO2013040940A1
WO2013040940A1 PCT/CN2012/078604 CN2012078604W WO2013040940A1 WO 2013040940 A1 WO2013040940 A1 WO 2013040940A1 CN 2012078604 W CN2012078604 W CN 2012078604W WO 2013040940 A1 WO2013040940 A1 WO 2013040940A1
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WO
WIPO (PCT)
Prior art keywords
node
ring
tunnel
protection
service
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/078604
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English (en)
Chinese (zh)
Inventor
杨慧
曲延锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2013040940A1 publication Critical patent/WO2013040940A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • 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
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for protecting a ring network.
  • a traffic engineer (TE) tunnel traffic engineer fast reroute (TE) is usually used on the ring.
  • the FRR) mechanism protects the business.
  • TE FRR protection you need to configure FRR protection tunnels for each link or node on the ring.
  • TE FRR cannot be protected normally.
  • FIG. 1 is a schematic diagram of a protection configuration when a TE FRR protection mechanism is adopted on a ring according to the prior art.
  • service 1 from A to D it can be directed to A to F and E respectively.
  • the two links are configured with fast reroute (FRR) protection.
  • FRR fast reroute
  • the working tunnel is lspl and the protection tunnels are lsp21 and lsp22.
  • lsp is the abbreviation of label switch path.
  • . 2 is a schematic diagram of TE FRR protection switching when a link between A and F is faulty according to the prior art
  • FIG. 3 is a TE FRR protection when a link between E and D on a ring is faulty according to the prior art.
  • Switching diagram as shown in Figure 2 and Figure 3, if fault 1 and fault 2 occur on the ring respectively, the service traffic is switched on the nodes on both sides of the failed link. The traffic can be transmitted normally after the reflow on some link segments. At the exit node D, there is no problem with FRR protection.
  • 4 is a schematic diagram of TE FRR protection failing to be normally switched when a link between A to F and E to D is faulty on the ring according to the prior art, as shown in FIG. 4, if fault 1 and fault 2 occur simultaneously on the ring , then both protection tunnels will be interrupted, in which case the FRR protection will be invalid.
  • the present invention provides a protection scheme for a ring network to solve at least the problem that the TE FRR protection mechanism in the related art cannot solve the multi-point failure on the ring.
  • a method of protecting a ring network is provided.
  • the method for protecting a ring network includes the following steps: The node on the ring network detects whether the link state between itself and the neighboring node changes through the fault detection packet of the link layer; when the link state changes are detected The node on the ring network is determined to be the upstream node of the fault; the node on the ring network switches the service traffic from the working tunnel to the protection tunnel, where the protection tunnel performs the lower ring processing of the service traffic at the service outbound node.
  • the method further includes: generating a status advertisement message, and sending a status advertisement message to the ring node in a direction away from the fault.
  • the method further includes: determining, by the ring node receiving the status advertisement message, whether it is a fault upstream upstream node; if yes, the ring The node performs protection switching on the service of the link or node through which the state change occurs.
  • the method further includes: creating a clockwise ring work for the node having the ring-out service on the ring a tunnel and a counterclockwise annular working tunnel, and a counterclockwise ring protection tunnel corresponding to the clockwise annular working tunnel and a clockwise protection tunnel corresponding to the counterclockwise working tunnel; wherein, all clockwise service sharing at the same node Clockwise ring working tunnel and counterclockwise ring protection tunnel corresponding to clockwise ring working tunnel, all counterclockwise service sharing counterclockwise service tunnels at the same node and clockwise ring protection tunnel corresponding to counterclockwise working tunnel .
  • the fault detection message is one of the following: a CC&CV packet and a BFD packet.
  • the method further includes: the ring network node no longer cuts the service traffic from the protection tunnel to the working tunnel.
  • a protection device for a ring net is also provided.
  • the protection device of the ring network includes: a detection module, configured to detect, by the fault detection message of the link layer, whether the link state of the link between the node and the adjacent node changes; the determining module is set to When the detecting module detects that the link state changes, it determines that the ring network node is the fault upstream neighboring node; the switching module sets the ring network node to switch the service traffic from the working tunnel to the protection tunnel, where the protection tunnel is in the service The ring node performs the lower ring processing of service traffic.
  • the device further includes: a generating module, configured to generate a status notification message when the detecting module detects that the link status changes; and the sending module is configured to send the status notification to the ring node in a direction away from the fault A packet, where the status advertisement packet includes an RDI packet or an R-APS packet.
  • the device further includes: a judging module, configured to: the ring node receiving the status advertisement message determines whether it is a fault upstream upstream node; and the protection module is configured to determine that the self determining node is a fault upstream upstream node In this case, the node on the ring performs protection switching on the service of the link or node through which the state change occurs.
  • the apparatus further comprises: a creating module, configured to create a clockwise annular working tunnel and a counterclockwise annular working tunnel for the node having the ringing service on the ring, and a counterclockwise ring protection corresponding to the clockwise annular working tunnel a tunnel and a clockwise protection tunnel corresponding to the counterclockwise working tunnel; wherein all the clockwise services sharing the ring at the same node share a clockwise ring working tunnel and a counterclockwise ring protection tunnel corresponding to the clockwise ring working tunnel, all The counterclockwise service of the same node exiting the ring shares a counterclockwise ring working tunnel and a clockwise ring protection tunnel corresponding to the counterclockwise working tunnel.
  • a creating module configured to create a clockwise annular working tunnel and a counterclockwise annular working tunnel for the node having the ringing service on the ring, and a counterclockwise ring protection corresponding to the clockwise annular working tunnel a tunnel and a clockwise protection tunnel corresponding to the counterclockwise
  • the node on the ring network is configured to switch the service traffic from the working tunnel to the protection tunnel when the link state of the neighboring node is changed, and the protection tunnel performs the traffic ring processing on the service outbound node.
  • the solution solves the problem that the TE FRR protection mechanism in the prior art cannot solve the multi-point failure on the ring, and improves the security and stability of the system.
  • FIG. 1 is a schematic diagram of a protection configuration when a TE FRR protection mechanism is adopted on a ring according to the prior art
  • FIG. 2 is a TE FRR protection when a link between A and F on a ring is faulty according to the prior art. Schematic diagram of handover
  • FIG. 3 is a schematic diagram of TE FRR protection switching when a link between E and D on a ring is faulty according to the prior art
  • FIG. 4 is a diagram between A to F and E to D on the ring according to the prior art.
  • FIG. 5 is a flowchart of a method for protecting a ring network according to an embodiment of the present invention
  • FIG. 6 is a structural block diagram of a protection device for a ring network according to an embodiment of the present invention
  • 7 is a structural block diagram of a protection apparatus for a ring network according to a preferred embodiment of the present invention
  • FIG. 8 is a block diagram showing a module structure of an extended TE FRR ring network protection method based on a shared channel according to a first embodiment of the present invention
  • 9 is a schematic diagram of a tunnel configuration of an extended TE FRR ring network protection method based on a shared channel according to a first embodiment of the present invention
  • FIG. 10 is a flowchart of a method for protecting an extended TE FRR ring network based on a shared channel according to a first embodiment of the present invention
  • FIG. 10 is a flowchart of a method for protecting an extended TE FRR ring network based on a shared channel according to a first embodiment of the present invention
  • FIG. 10 is a flowchart of a method for protecting an extended TE FRR
  • FIG. 11 is a diagram showing an example of a service protection configuration of a shared channel-based extended TE FRR ring network protection method according to Embodiment 2 of the present invention
  • FIG. 12 is an extended TE FRR ring network based on a shared channel according to Embodiment 2 of the present invention
  • FIG. 13 is a diagram showing an example of a multipoint failure service protection handover based on a shared channel-based extended TE FRR ring network protection method according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of a method for protecting a ring network according to an embodiment of the present invention.
  • the method includes the following steps: Step S502: A node on a ring network detects itself and neighbors through a fault detection packet of a link layer. Whether the link state of the node changes; Step S504, if it is detected that the link state changes, determining that the ring network node is a fault upstream neighbor node; Step S506, the ring network node sends traffic from the working tunnel Switching to the protection tunnel, where the protection tunnel performs the lower ring processing of the service traffic at the service outbound node.
  • the node on the ring network is configured to switch the service traffic from the working tunnel to the protection tunnel when the link state of the neighboring node is changed, and the protection tunnel performs the service loop processing on the service outbound node.
  • the solution solves the problem that the TE FRR protection mechanism in the related technology cannot solve the multi-point failure on the ring, and improves the security and stability of the system.
  • a status advertisement message is generated, and a status advertisement message is sent to the ring node in a direction away from the fault.
  • the status advertisement message includes but is not limited to a remote fault notification (Remote Defect) Indication (referred to as RDI) packet or Ring-Automatic Protection Switching (R-APS) packet.
  • RDI remote fault notification
  • R-APS Ring-Automatic Protection Switching
  • This method can improve the effectiveness and accuracy of the system.
  • the ring node receiving the status advertisement message determines whether it is the adjacent node of the fault upstream; if yes, the node pair on the ring occurs.
  • the service of the changed link or node performs protection switching. This method can improve the stability of the system.
  • a clockwise annular working tunnel and a counterclockwise annular working tunnel are created for the node having the ringing service on the ring, and a counterclockwise annular protection tunnel corresponding to the clockwise annular working tunnel and the counterclockwise A clockwise protection tunnel corresponding to the working tunnel; wherein all clockwise services sharing the ring at the same node share a clockwise ring working tunnel and a counterclockwise ring protection tunnel corresponding to the clockwise ring working tunnel, all exiting at the same node
  • the counterclockwise service shares a counterclockwise ring working tunnel and a clockwise ring protection tunnel corresponding to the counterclockwise working tunnel.
  • FIG. 6 is a structural block diagram of a protection apparatus for a ring network according to an embodiment of the present invention. As shown in FIG. 6, the apparatus includes: a detection module 62 configured to detect a self-phase and a phase through a fault detection message of a link layer on a ring network node.
  • a detection module 62 configured to detect a self-phase and a phase through a fault detection message of a link layer on a ring network node.
  • the determining module 64 is coupled to the detecting module 62, and configured to determine, when the detecting module 62 detects that the link state changes, determining that the ring network node is a fault upstream neighboring node; 66, coupled to the determining module 64, configured to switch the service traffic from the working tunnel to the protection tunnel, where the protection tunnel performs the lower ring processing of the service traffic at the service outbound node.
  • the switching module 66 switches the service traffic from the working tunnel to the protection tunnel, and the protection tunnel performs the service at the service outgoing node.
  • FIG. 7 is a structural block diagram of a protection device for a ring network according to a preferred embodiment of the present invention.
  • the device further includes: a generating module 70 coupled to the detecting module 62, configured to detect the link at the detecting module 62. State In the case of a change, a status notification message is generated.
  • the sending module 72 is coupled to the generating module 70, and configured to send a status advertisement message to the ring node in a direction away from the fault, where the status advertisement message includes a remote fault notification RDI.
  • the packet or ring network automatically protects the R-APS packet.
  • the device further includes: a determining module 74, coupled to the sending module 72, configured to receive the status notification message, the ring node determines whether it is a fault upstream upstream node; the protection module 76 is coupled to the determining module 74, When the judging module 74 determines that it is a faulty upstream neighboring node, the ring node performs protection switching on the service of the link or node that has undergone the state change.
  • the apparatus further includes: a creating module 78 coupled to the switching module 66 and the protection module 76, configured to create a clockwise annular working tunnel and a counterclockwise circular working tunnel for the node having the ringing service on the ring, and a clockwise annular working tunnel corresponding to the counterclockwise annular protection tunnel and a clockwise protection tunnel corresponding to the counterclockwise working tunnel; wherein all clockwise services in the same node exiting the clock share a clockwise circular working tunnel and the clockwise ring
  • the counterclockwise ring protection tunnel corresponding to the working tunnel, all counterclockwise services sharing the ring at the same node share a counterclockwise ring working tunnel and a clockwise ring protection tunnel corresponding to the counterclockwise working tunnel.
  • Embodiment 1 provides an extended TE FRR ring network protection method based on a shared channel, SP. First, a clockwise ring working tunnel and a counterclockwise ring work are respectively created for any ring-ring service node on the ring.
  • FIG. 8 is a schematic diagram of a module structure of a method for protecting an extended TE FRR ring network based on a shared channel according to the first embodiment of the present invention.
  • the system in this embodiment may include: a path configuration module, a state detection module, and a state. Notification module and service switching module. Each module will be described in detail below.
  • the path configuration module is configured to create a clockwise ring working tunnel, a counterclockwise ring working tunnel, a clockwise ring protection tunnel, and a counterclockwise ring protection tunnel for all nodes on the ring that have the ringing service.
  • the inverse/clockwise service of the ring node loops shares this inverse/clockwise ring working tunnel, and the two cis/counterclock ring protection tunnels are used to perform all pairs of rings on the corresponding inverse/clockwise ring working tunnel Road and node protection. If there are N nodes on the ring, then at most 4N ring tunnels need to be configured.
  • FIG. 9 is a schematic diagram of a tunnel configuration of an extended TE FRR ring network protection method based on a shared channel according to the first embodiment of the present invention. As shown in FIG.
  • the first mode is to establish four tunnels: a protection tunnel lsp31 and a working tunnel lsp41 are The clockwise ring tunnel, the protection tunnel lsp32 and the working tunnel lsp42 are counterclockwise ring tunnels, wherein lsp31 is used to protect lsp42, lsp32 is used to protect lsp41; the second way is to establish two tunnels: clockwise ring tunnel lspll and counterclockwise Ring tunnel lspl2, these two tunnels are active and standby; and no matter which way, the end point of these ring tunnels is node D, that is, the exit node.
  • the status detection module is configured to detect the status of the link by detecting a fault detection packet at the link layer between two directly adjacent nodes on the ring network. For example, the link status is detected by detecting Continuity Check and Connectivity Verification (CC&CV), Bidirectional Forwarding Detection (BFD) packets, and the like.
  • the status notification module is configured to generate a status advertisement message when the status detection module detects that the link status changes, and sends the status advertisement message along the ring away from the fault to the ring node until the faulty downstream node.
  • the status advertisement message includes, but is not limited to, a Remote Defect Indication (RDI) packet, and a Ring-Automatic Protection Switching (R-APS) packet.
  • RDI Remote Defect Indication
  • R-APS Ring-Automatic Protection Switching
  • the status notification module here is an optional module, and the module can be deleted as far as the extended protection method itself is concerned, but for further expansion processing, it is considered to retain the module.
  • the service switching module is configured to perform corresponding service switching processing after the status of the link is changed or after receiving the status advertisement message sent by other nodes: If the node is a fault upstream upstream node, the node is performed on the node. The change of state, that is, the protection switching of the traffic of the link or node through which the state change occurs. It should be noted here that other nodes except the adjacent upstream node of the fault, including the downstream neighboring nodes of the fault, do not perform any handover processing.
  • a ring working/protection tunnel is configured for a node having a ring-out service on the ring network. Create a clockwise ring working tunnel, a counterclockwise ring working tunnel, a clockwise ring protection tunnel and a counterclockwise ring protection tunnel for all the nodes with ringing services on the ring, all of which are reversed at the exiting ring node.
  • the /clockwise service shares this inverse/clockwise ring working tunnel, and the two clockwise/counterclockwise ring protection tunnels are used to protect all links and nodes on the ring against the corresponding inverse/clockwise ring working tunnel.
  • the forward/counterclockwise annular working tunnel and the forward/counterclockwise annular protective tunnel can be directly merged into the same tunnel, that is, only one clockwise circular tunnel and one counterclockwise circular tunnel are established, and the two tunnels are mutually active and standby.
  • the protection tunnel lsp31 and the working tunnel lsp41 are clockwise ring tunnels
  • the protection tunnel lsp32 and the working tunnel lsp42 are counterclockwise ring tunnels, wherein lsp31 is used to protect lsp42, lsp32 is used to protect lsp41
  • the way is to establish two tunnels: a clockwise ring tunnel lspll and a counterclockwise ring tunnel lspl2, which are mutually active and standby; and no matter which way, the end points of these ring tunnels are node D, that is, the exit node.
  • Feature 2 Each link on the ring (that is, each node on the ring detects the link state with two adjacent nodes, including whether the link or node is faulty) initiates fault detection.
  • Feature 3 When a node on the ring detects the link state or the state of the peer node changes from the normal state to the fault state, the state change notification message is sent to other nodes along the direction of the ring away from the fault. It should be noted here that this step is an optional process, that is, the fault detection node may not notify the fault to other nodes (non-fault neighbor nodes).
  • Feature 4 After receiving the status advertisement message or detecting the fault, the other node on the ring determines that if the node is a faulty upstream neighbor node, the state change on the node is performed, that is, the link that has undergone the state change Or the node's service performs protection switching. It should be noted here that other nodes except the adjacent upstream node of the fault, including the downstream neighboring nodes of the fault, do not perform any handover processing.
  • Feature 5 When a node on the ring detects the link state or the state of the peer node changes from the fault state to the normal state, the state change notification message is sent to other nodes along the direction of the ring away from the original fault.
  • this step is an optional process, that is, the fault detection node may not notify the fault recovery to other nodes (non-fault neighbor nodes).
  • Feature 6 After receiving the status advertisement message or detecting the fault, the other node on the ring determines that if the node is a fault neighboring node, the state changes on the node, that is, the link after the state change occurs. Or the node's business is protected back. It should be noted here that other nodes except the adjacent upstream nodes of the fault, including the adjacent nodes downstream of the fault, do not perform any switchback processing.
  • FIG. 10 is a flowchart of a method for protecting an extended TE FRR ring network based on a shared channel according to the first embodiment of the present invention.
  • the extended TE FRR ring network protection method based on the shared channel in this embodiment may include the following steps.
  • Step S1001 Configure the work of the service ring node on the ring and protect the tunnel.
  • Step S1002 A fault detection packet is periodically sent on each link.
  • step S1003 it is detected whether the link status is changed by the fault detection message. If yes, go to step S1004, otherwise, go to step S1005.
  • step S1004 the status advertisement message is immediately generated and sent to other nodes, and the process proceeds to step S1006.
  • Step S1005 periodically transmitting a status advertisement.
  • Step S1006 The ring node detects or receives another state change notification message.
  • step S1007 it is determined whether the node is a fault upstream upstream node. If yes, go to step S1008, otherwise the process ends.
  • the TE FRR can only protect the link or node and cannot protect against multiple points of failure while switching rapidly.
  • Embodiment 2 In this embodiment, the single-point and multi-point network faults shown in FIG. 11, 12, and 13 are taken as an example. The specific implementation process of the protection for the ring network is briefly described below.
  • FIG. 11 is a diagram showing an example of service protection configuration of an extended TE FRR ring network protection method based on a shared channel according to Embodiment 2 of the present invention. As shown in FIG. 11, for a point D in the network, there is a service 1 from A to D.
  • the protection tunnel lsp31 and the working tunnel lsp41 are clockwise ring tunnels, and the protection tunnel lsp32 and the working tunnel lsp42 are counterclockwise ring tunnels, wherein lsp31 is used to protect lsp42, lsp32 is used to protect lsp41; the end points of these ring tunnels are node D , that is, the exit node.
  • FIG. 12 is a schematic diagram of a single-point fault service protection switching according to a shared channel-based extended TE FRR ring network protection method according to Embodiment 2 of the present invention. As shown in FIG. 12, when a link between E and D fails, because Service 2 does not pass through the faulty link, so Service 2 does not have any handover, and only the protection handover process of Service 1 is discussed later.
  • E and D can detect the fault quickly.
  • the E point will protect the service 1 and switch the service 1 from work.
  • the tunnel lsp41 is switched to the protection tunnel lsp32, and the service 1 is directly transmitted along A-F-E-F-A-B-C-D and is looped down at point D.
  • E and D can quickly detect the fault recovery information through the OAM mechanism of the fault detection module.
  • the E point will protect the service 1 according to the working tunnel switchback configuration.
  • FIG. 13 is a diagram showing an example of multi-point fault service protection switching based on a shared channel-based extended TE FRR ring network protection method according to Embodiment 2 of the present invention, as shown in FIG.
  • the service 2 does not undergo any handover because the service 2 does not pass through the faulty link. Only the protection switching process of the service 1 is discussed later.
  • A, F, E, and D can quickly detect the fault, and the A and E points will perform protection switching on the service 1, that is, the service 1 is switched from the working tunnel lsp41 to the protection tunnel lsp32.
  • Service 1 transmits directly along A-B-C-D and rings at point D. It should be added here that the switching process may be different according to the order in which multiple faults occur. For example, if fault 1 occurs first, node A performs protection switching on service 1, and then fault 2 occurs again, because traffic At this time, the node E is no longer passed. Therefore, the E only changes the protection switching state of the working tunnel, and does not actually switch the service traffic. If fault 2 occurs first, node E first performs protection switching on service 1.
  • node A not only modifies the protection switching state, but also protects the traffic of service 1.
  • the fault recovery information can be quickly detected by A, F, E, and D through the OAM mechanism of the fault detection module.
  • the A and E points are based on the working tunnel.
  • the failback configuration protects service 1 from the protection switch (including immediate switchback, delay switchback, and never switchback). If it is a switchback type, service 1 is switched back from the protection tunnel lsp32 to the work tunnel. On lsp41, service 1 is still transmitted on the ring along the working tunnel lsp41. It should be added here that the reciprocating process may be different according to the order in which multiple fault recovery occurs.
  • node A protects service 1 and traffic flows along AF-E F _ A — B _C_ D is transmitted on the ring.
  • the node E protects the service 1 and the traffic is transmitted along the A-F-ED on the ring.
  • the recovery process is completed. In the recovery, the node E first protects the service 1 from the service. However, because the traffic at the E point has no traffic 1 and the traffic is not actually processed, the node 1 will have the service on the node A. The flow of 1 is protected and cut back, and the flow is transmitted along the ring along A-F-ED.
  • the extended TE FRR ring network tunnel configuration scheme based on the shared channel provided by the embodiment of the present invention, when the node on the ring network detects that the link state of the neighboring node changes, The service traffic is switched from the working tunnel to the protection tunnel, and the protection tunnel is processed in the lower ring of the service outbound node.
  • the TE FRR protection mechanism in the related technology cannot solve the problem of multiple points on the ring, and the system is improved. Safety and stability.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

La présente invention porte sur un procédé et un dispositif de protection de réseau en anneau. Le procédé comprend les opérations suivantes : un nœud d'anneau détecte si l'état d'une liaison entre lui-même et un nœud adjacent a changé par l'intermédiaire d'un message de détection de défaillance de la couche de liaison ; s'il est détecté que l'état de la liaison a changé, il est établi que le nœud d'anneau est un nœud adjacent amont défaillant ; le nœud d'anneau commute le trafic de service d'un tunnel de travail vers un tunnel de protection, le tunnel de protection exécutant un traitement d'anneau aval sur le trafic de service au niveau d'un nœud de service hors anneau. La présente invention résout le problème de l'état antérieur de la technique selon lequel le mécanisme de protection TE FRR ne peut pas résoudre une défaillance multipoint sur l'anneau et améliore la sécurité et la stabilité du système.
PCT/CN2012/078604 2011-09-21 2012-07-13 Procédé et dispositif de protection de réseau en anneau Ceased WO2013040940A1 (fr)

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CN201110281394.9 2011-09-21
CN201110281394.9A CN103023770B (zh) 2011-09-21 2011-09-21 环网的保护方法及装置

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CN107528759B (zh) * 2016-06-22 2021-10-08 中兴通讯股份有限公司 业务处理方法、业务出环节点及环网
CN109218176B (zh) * 2017-06-30 2020-12-15 华为技术有限公司 一种报文处理的方法及装置
CN109639549B (zh) * 2017-10-09 2021-11-05 中兴通讯股份有限公司 一种环网保护的实现方法和环网保护系统
WO2020136874A1 (fr) * 2018-12-28 2020-07-02 三菱電機株式会社 Dispositif de surveillance, système de réseau, dispositif de gestion de topologie et programme de surveillance
CN112152923B (zh) * 2019-06-28 2021-12-28 北京华为数字技术有限公司 用户面重路由方法及装置

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