WO2015196640A1 - Procédé et dispositif de protection de réseau en anneau à double commutation - Google Patents

Procédé et dispositif de protection de réseau en anneau à double commutation Download PDF

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Publication number
WO2015196640A1
WO2015196640A1 PCT/CN2014/088626 CN2014088626W WO2015196640A1 WO 2015196640 A1 WO2015196640 A1 WO 2015196640A1 CN 2014088626 W CN2014088626 W CN 2014088626W WO 2015196640 A1 WO2015196640 A1 WO 2015196640A1
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Prior art keywords
tunnel
node
ring network
switching
protection
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PCT/CN2014/088626
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English (en)
Chinese (zh)
Inventor
何益波
姚芳
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中兴通讯股份有限公司
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Priority to KR1020177002280A priority Critical patent/KR101907585B1/ko
Priority to JP2016575118A priority patent/JP6408615B2/ja
Publication of WO2015196640A1 publication Critical patent/WO2015196640A1/fr

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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
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/55—Prevention, detection or correction of errors

Definitions

  • the invention relates to the technical field of double-cut ring network protection, and in particular relates to a double-cut ring network protection method and device.
  • MPLS-TP MPLS Transport Profile
  • the ring network protection technology has the advantage of segment layer protection, which can save a large number of LSP (Label Switched Path) entries and configuration workload.
  • LSP Label Switched Path
  • two shared ring networks are tangent to a two-node interconnect.
  • a single-ring protection mechanism can be used, but if there are multiple faults, such as a tangent point at some If both physical links in the ring fail, traffic will still be interrupted.
  • the current scheme is to adopt a method of superimposing linear protection, as shown in FIG. 1 , which includes two ring networks which are respectively composed of an ABDC node and a CDFE node and are tangent to the node C and the node D.
  • a double-cut ring network structure is typical, in which the dotted line shows a protection tunnel for tunnel linear protection.
  • FIG. 1 a typical method of superimposed linear protection is adopted, which has the following problems: the protection configuration is complicated, a large number of linear LSP protections need to be deployed, and a large number of LSP OAMs (Operation Administration and Maintenance) need to be enabled; The OAM needs to occupy more bandwidth and hardware and software resources.
  • the linear protection lag time is usually required. , causing the switching time to be between 100 and 150 ms.
  • the main technical problem to be solved by the embodiments of the present invention is to provide a double-cut ring network protection method and device, which solves the problems of complicated configuration, low resource utilization, and long occupation time of the related superimposed linear protection scheme.
  • a double-cut ring network protection method where the double-cut ring network includes an ingress ring network and a ring-out network that are tangent to a primary node and a backup node, and the method includes:
  • the handover tunnel includes a primary handover tunnel that is from the primary node to the backup node, and at least a part of the tunnel directly connects the primary node and the backup node, and a backup protection switching tunnel opposite to the direction of the primary switching tunnel, where all nodes in the ring-entry network are on the standby protection switching tunnel;
  • the current service is switched to the switching tunnel and delivered to the backup node, and the backup node enters the outgoing ring network.
  • the two physical links of the primary node in the outgoing ring network refer to the physical link where the primary node is located in the outgoing ring network and the non-interconnected port.
  • the backup protection switching tunnel is a closed loop tunnel.
  • the method further includes:
  • the service is preferentially switched to the working tunnel of the outgoing ring network, and if the working tunnel is faulty, it is switched to the protection tunnel of the working tunnel.
  • the step of switching the current service to the handover tunnel includes:
  • the current service is preferentially switched to the primary handover tunnel, and if the primary handover tunnel is faulty, the service is switched to the backup protection handover tunnel.
  • the step of the primary node failing on both physical links in the outgoing ring network includes:
  • the master node only fails on two physical links in the outgoing ring network
  • the two physical links of the primary node in the outgoing ring network fail, and at the same time, at least one physical link in the incoming ring network fails.
  • a double-cut ring network protection device wherein the double-cut ring network includes tangent to a master node and a backup The ringing network and the outgoing ring network of the node;
  • the double-cut ring network protection device includes a path configuration module and a path switching module, where:
  • the path configuration module is configured to: establish a handover tunnel in the ring-in network; the handover tunnel includes a direction from the master node to the backup node, and at least a part of the tunnel directly connects to the master node and the a primary switching tunnel of the backup node, and a backup protection switching tunnel opposite to the direction of the primary switching tunnel, where all nodes in the incoming ring network are on the standby protection switching tunnel;
  • the path switching module is configured to: when the primary node fails in the two physical links in the outgoing ring network, switch the current service to the switching tunnel, where the switching tunnel The service is delivered to the backup node;
  • the two physical links of the primary node in the outgoing ring network refer to the physical link where the primary node is located in the outgoing ring network and the non-interconnected port.
  • the backup protection switching tunnel is a closed loop tunnel.
  • the path switching module includes a working path switching submodule and a protection path switching submodule, where:
  • the working path switching sub-module is configured to switch the current service to the working tunnel of the outgoing ring network preferentially after the current service enters the outgoing ring network through the backup node, as described above. If the tunnel is faulty, notify the protection path switching submodule;
  • the protection path switching sub-module is configured to: after receiving the notification, switch the current service to a protection tunnel of the working tunnel.
  • the path switching module includes a primary path switching submodule and an alternate path switching submodule;
  • the primary path switching sub-module is configured to switch the current service to the primary switching tunnel preferentially when the current service is switched to the switching tunnel, and notify the standby if the primary switching tunnel fails.
  • Path switching submodule
  • the standby path switching submodule is configured to: after receiving the notification, switch the current service to the standby protection switching tunnel.
  • the failure of the primary node in the two physical links in the outgoing ring network includes:
  • the master node only fails on two physical links in the outgoing ring network
  • the two physical links of the primary node in the outgoing ring network fail, and at the same time, at least one physical link in the incoming ring network fails.
  • the double-cut ring network protection method and device provided by the embodiment of the present invention first establish a handover tunnel in the ring-entry network; the handover tunnel includes a direction from the primary node to the backup node, and at least a part of the tunnel directly connects the primary node and the backup node.
  • the primary switching tunnel, and the backup protection switching tunnel in the opposite direction of the primary switching tunnel, all the nodes in the ring-entry network are on the standby protection switching tunnel; then when the primary node fails in the two physical links in the outgoing ring network
  • the current service is directly switched to the previously established switching tunnel, and is transmitted to the backup node through the switching tunnel, and then enters the outgoing ring network through the backup node.
  • the switchover tunnel configured in the ring can be used to implement the switchover of the cross-ring network in a simple and fast manner, and does not need to deploy a large number of linear LSP protections, thereby reducing deployment.
  • the resources required for a large number of linear LSPs are used to improve the resource utilization, and the configuration process is simplified.
  • the linear protection lag time is not required, so that the switching time can be reduced.
  • the entire protection switching needs of the solution of the embodiment of the present invention is verified. The time meets no more than 50ms, and the path is consistent for the two-way service switching.
  • FIG. 1 is a schematic diagram of superposition linear protection for a double-cut ring network in the related art
  • FIG. 2 is a schematic structural diagram of a double-cut ring network according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic flowchart of a double-cut ring network protection method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of a double-cut ring network protection device according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of two physical link failure situations of a primary node in an outgoing ring network according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of two physical link failure situations 2 of a master node in an outgoing ring network according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of two physical link failures of a master node in an outgoing ring network according to Embodiment 3 of the present invention. Schematic diagram of case three;
  • FIG. 8 is a schematic diagram of four physical link failure situations 4 of a primary node in an outgoing ring network according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic diagram of a fault condition of two physical links of a master node in an ingress ring network according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic diagram of two physical link failure situations 2 of a primary node in an ingress ring network according to Embodiment 3 of the present invention.
  • FIG. 11 is a schematic diagram of three physical link failure situations 3 of a primary node in an ingress ring network according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • nodes A-B-C-D form a ring network 1
  • nodes C-D-F-E form a ring network 2
  • ring network 1 and ring network 2 are interconnected by node C and node D, and node C and node D become cross-ring nodes.
  • the node through which the service tunnel passes is called the primary node, and the other node is called the backup node.
  • the backup node stores the service tunnel configuration.
  • ring network 1 and ring network 2 it can be referred to as an incoming ring network and an outgoing ring network in a direction from the direction of service flow. For example, in FIG.
  • a bidirectional service tunnel from the A node to the E node is established, and from the A node to the E node direction, where the service tunnel enters the shared ring network on the A node, and the service tunnel on the C network element is shared from the shared network. Exit from the ring network, then enter the shared ring network on the right side, exit the shared ring network on the E node, and restore the service tunnel. Because the C node is the node through which the service tunnel passes, it is called the primary node; the corresponding D node is the backup node; the ring network 1 is called the ingress ring network, and the ring network 2 is called the outgoing ring network.
  • the ring 2 is called the ring-in network
  • the ring 1 is called the ring-out network.
  • the connection port between the primary node and the backup node is called an interconnection port.
  • a link detection device may be set on the primary node and the backup node to detect the physical link status of the four ports (two interconnect ports and two non-interconnect ports) on the primary node and the backup node.
  • the two ports connected by the master node C and the backup node D are interconnect ports, and the ends connected to the node A and the node E respectively.
  • the port is a non-interconnecting port; the two ports connected to the primary node C of the backup node D are interconnecting ports, and the ports respectively connected to the node B and the node F are non-interconnecting ports.
  • the two physical links of the primary node C in the ring-entry network refer to the two physical links of the CA and the CD in the ring-entry network; the two links in the outgoing ring network refer to the ring-connected network.
  • a working tunnel and a corresponding protection tunnel are arranged in the ring network.
  • the working tunnel is generally configured as the longest path so that all nodes are on the working tunnel; the corresponding protection tunnel is opposite to the working tunnel and is closed loop.
  • the working tunnel of the ring network 1 is D->B->A->C
  • the corresponding protection tunnel is D->C->A->B->D
  • the working tunnel of the ring network 2 is F->D->C->E
  • the corresponding protection tunnel is F->E->C->D->F.
  • Step 301 Establish a handover tunnel in the ring network of the double-cut ring network.
  • the switching tunnel established here includes a primary switching tunnel from the primary node to the backup node, and at least a part of the tunnel is directly connected to the primary node and the backup node, and a backup protection switching tunnel opposite to the primary switching tunnel, in the ring network. All nodes are on the standby protection switching tunnel;
  • Step 302 Determine whether the two physical links of the primary node in the outgoing ring network are faulty. If yes, go to step 303; otherwise, return to continue judgment;
  • Step 303 Switch the current service to the previously established switching tunnel, and deliver the same to the backup node through the switching tunnel.
  • Step 304 The service enters the outgoing ring network through the backup node.
  • any other node is the starting node, and the backup node is the terminating node, as long as at least a part of the tunnel of the primary switching tunnel directly connects the two directly from the primary node to the standby node.
  • all the nodes in the ring-entry network are all on the standby protection switching tunnel.
  • the standby protection switching tunnel can be configured as a closed-loop tunnel or according to the actual situation. Need to be configured as a non-closed loop tunnel.
  • the configuration process of the handover tunnel is still exemplarily described below in conjunction with the double-cut ring network shown in FIG. 2:
  • the ring network 1 is still taken into the ring network, and the ring network 2 is taken as an outgoing ring network.
  • the manner of establishing a handover tunnel may include any one of the following methods:
  • the third type is preferred for the above several configurations. It should be understood that, as the specific configuration of the shared ring network is changed, for example, the number of nodes is increased or decreased, the specific configuration is not limited to the above examples, and may be appropriately modified according to specific structures and application scenarios.
  • the service is preferentially switched to the working tunnel of the outgoing ring network. If the working tunnel fails, the service is switched to the protection tunnel of the working tunnel.
  • the working tunnel fault here may specifically refer to a fault between the current node of the service to the egress node (that is, the node that the service exits the shared ring network).
  • the round-trip handover is performed until the service arrives at the egress node and exits the shared ring network (ie, exits the ring network).
  • the two physical links of the primary node in the outgoing ring network are all faulty.
  • the process of switching the current service to the switching tunnel includes:
  • the service is switched to the primary switching tunnel, for example, the primary switching tunnel is faulty, and the service is switched to the corresponding standby protection switching tunnel.
  • the primary handover tunnel fault here refers specifically to the failure of the path between the current node of the service and the standby node on the primary handover tunnel.
  • the primary node when the two physical links in the ring network fail, the primary node can directly forward the service to the backup node through the working tunnel and the protection tunnel in the ring network; the master node is in the ring network. Failures in both physical links include:
  • the primary node only fails on two physical links in the ring network
  • the two physical links of the primary node in the ring-entry network fail and at the same time, at least one physical link in the outgoing ring network fails;
  • the failure of the two physical links of the master node in the outgoing ring network includes:
  • the primary node only fails on two physical links in the outgoing ring network
  • the two physical links of the primary node in the outgoing ring network fail and at the same time, at least one physical link in the incoming ring network fails.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a double-cut ring network protection device.
  • the path configuration module 41 and the path switching module 42 are included:
  • the path configuration module 41 is configured to: establish a handover tunnel in the ring-in network; the handover tunnel includes a primary handover tunnel from the primary node to the backup node, and at least a part of the tunnel directly connects the primary node and the backup node, and the primary handover tunnel
  • the alternate protection switching tunnel in the opposite direction, all nodes in the ring network are on the standby protection switching tunnel;
  • the path switching module 42 is configured to: when the primary node fails in the two physical links in the outgoing ring network, switch the current service to the switching tunnel, and the service is delivered to the backup node by the switching tunnel. The service then enters the outgoing ring network through the backup node.
  • the backup protection switching tunnel configured by the path configuration module 41 in this embodiment is a closed loop tunnel; of course, it may be a non-closed loop tunnel according to actual conditions. It can be used in a shared ring network in a specific configuration, and is preferably configured on the principle that the configured path is the longest.
  • the path switching module 42 includes a working path switching sub-module 421 and a protection path switching sub-module 422.
  • the working path switching sub-module 421 is configured to switch the service priority to the out-out after the service enters the outgoing ring network through the backup node.
  • the protection path switching sub-module 422 is notified; the protection path switching sub-module 422 is configured to: receive the After the notification, the service is switched to the protection tunnel of the working tunnel.
  • the path switching module 42 further includes a primary path switching submodule 423 and an alternate path switching submodule 424;
  • the primary path switching submodule 423 when the service is switched to the handover tunnel, the primary path switching submodule 423 is configured to: preferentially switch the service to the primary switching tunnel, such as the primary switching tunnel failure, and notify the alternate path switching submodule 424; the alternate path switching subroutine Module 424 is configured to switch the service to the alternate protection switching tunnel upon receipt of the notification.
  • the primary node when the two physical links in the ring network fail, the primary node can directly forward the service to the backup node through the working tunnel and the protection tunnel in the ring network; the master node is in the ring network. Failures in both physical links include:
  • the primary node only fails on two physical links in the ring network
  • the two physical links of the primary node in the ring-entry network fail and at the same time, at least one physical link in the outgoing ring network fails;
  • the failure of the two physical links of the master node in the outgoing ring network includes:
  • the primary node only fails on two physical links in the outgoing ring network
  • the two physical links of the primary node in the outgoing ring network fail and at the same time, at least one physical link in the incoming ring network fails.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the double-cut ring network shown in FIG. 2 is still taken as an example for description.
  • the service tunnel enters the shared ring network, and the service tunnel on the node C exits from the left shared ring network, and then Enter the shared ring network on the right and exit the shared ring network on the E node to restore the service tunnel.
  • the C node is a network element through which the service tunnel passes, it is called a master node.
  • the ring network 1 is called an incoming ring network
  • the ring network 2 is called an outgoing ring network.
  • the ring network 2 is referred to as an ingress ring network, and the ring network 1 is referred to as an egress ring network.
  • the following description of the embodiment is taken as an example from the direction of A to E; for the slave E node It is a symmetric process in the direction of the A node, and will not be described here.
  • the outbound interface is still the working tunnel in the loop from F->D->C->E.
  • the inbound interface can be used to fill the port between D and B, or a port can be set arbitrarily.
  • Configure the primary switching tunnel in the ring network that is, ring network 1) as B->A->C->D; and configure the corresponding backup protection switching tunnel as B->D->C->A->B .
  • the working tunnel of the ring-entry network is D->B->A->C, and the corresponding protection tunnel is D->C->A->B->D;
  • the working tunnel of the ring-out network ie ring network 2
  • It is F->D->C->E;
  • the corresponding protection tunnel is F->E->C->D->F.
  • the single ring protection switch that is, through the working tunnel of the ring network and the ring network.
  • the corresponding protection tunnel can be reversed by switching.
  • There is no cross-ring switching action For example, if the link between node A and node C in the ring network is broken, a simple single-ring switching operation is required.
  • a cross-ring switching action is involved only when the primary node fails on both physical links in the ring network. The following describes the specific fault examples of the master node.
  • FIG. 5 shows that the primary node C only appears on the two physical links in the outgoing ring network (ie, C->E link and C->D link). Fault; the switching process at this time is:
  • the service enters the primary node C through the working tunnel of the ring network, and the cross-ring switching action occurs on the primary node C.
  • the service exits from the working tunnel of the incoming ring network on the primary node C and directly enters the primary switching tunnel.
  • the service can be directly transmitted from the node C to the node D (the node is a backup node) and terminated at the node D; at the node D After exiting the service, the service enters the outgoing ring network on the backup node D.
  • the service After entering the outgoing ring network, the service first enters the working tunnel of the outgoing ring network F->D->C->E; since node D to node C If the path is faulty, the service cannot be directly transmitted to the egress node E through the working tunnel, so switch to the corresponding protection tunnel F->E->C->D->F; the path between node E and node C fails. And the service is to be down at the node E (that is, to exit the shared ring network), so the single ring switching operation is performed at the node E, and then switched to the working tunnel, and after switching to the working tunnel, the service is currently in the On node E, therefore, it is directly down at node E. Refer to the dotted line in Figure 5 for the path involved in this switching process.
  • FIG. 6 the figure shows that two physical links (ie, C->E link and C->D link) of the primary node C in the outgoing ring network are faulty, and are simultaneously in the ring.
  • the path between the node A and the node C on the working tunnel is faulty, and the switch is switched to the protection tunnel of the working tunnel.
  • the B through the protection tunnel passes through the B and D to reach the C network element.
  • the NE is switched to the working tunnel, and then exits the shared ring network and is ready to enter the loop.
  • the ring network works and the protection link are faulty.
  • the master node C has a cross-ring switching action. The service enters the ring on the master node C.
  • the working tunnel of the network exits and directly enters the primary switching tunnel.
  • the service Since the service is currently on the node C of the primary switching tunnel, and the path between the node C and the node D is not faulty, the service can be directly transmitted from the node C to the node D ( The node is a backup node) and terminates at node D; the node D exits to get the service, and the service enters the ring network on the backup node D; the next action is the same as the subsequent processing in FIG.
  • the two physical links (ie, C->E link and C->D link) of the primary node C in the outgoing ring network are faulty, and are simultaneously in the ring.
  • Another link in the network (C->D link) fails; the switching process at this time is:
  • the service enters the primary node C through the working tunnel of the ring network. Since the working and protection links of the outgoing ring network are broken, a cross-ring switching action occurs at the primary node C, and the service tunnels from the incoming ring network on the primary node C. Exit, directly enter the main switching tunnel. Since the service is currently on the node C of the primary switching tunnel, and the path between the node C and the node D fails, switch to the corresponding backup protection switching tunnel, and switch over the standby protection tunnel.
  • the nodes C, A, and B are delivered to the node D; the node D exits to obtain the service, and the service enters the outgoing ring network on the backup node D; after entering the outgoing ring network, the service first enters the working tunnel of the outgoing ring network F->D ->C->E; Because the path between node D and node C is faulty, the service cannot be directly transmitted to the egress node E through the working tunnel, so switch to the corresponding protection tunnel F->E->C->D- >F; since the service is currently on node D, the service can be directly delivered to node F and then to node E; the path between node E and node C fails, and the service is to be down at node E.
  • the two physical links (ie, C->E link and C->D link) of the primary node C in the outgoing ring network are faulty, and are simultaneously in the ring.
  • the two physical links in the network (C->D link and C->A) are faulty; the switching process at this time is:
  • the path between the node A and the node C on the working tunnel is faulty when it is transmitted through the working tunnel, and the switch is switched to the protection tunnel corresponding to the working tunnel.
  • the protection tunnel reaches the D point through the node B, due to the CD
  • the standby node performs a cross-ring switching action to exit the service tunnel carried on the protection tunnel.
  • the service enters the ring network on the backup node D. After entering the ring network, the service first enters the working tunnel of the ring network.
  • the figure shows that the primary node C only fails on two physical links in the ring network (ie, C->A link and C->D link);
  • the process is:
  • the path between the node A and the node C on the working tunnel is faulty when it is transmitted through the working tunnel, and the switch is switched to the protection tunnel corresponding to the working tunnel.
  • the protection tunnel reaches the D point through the node B, due to the CD
  • the standby node performs a cross-ring switching action to exit the service tunnel carried on the protection tunnel.
  • the service enters the ring network on the backup node D. After entering the ring network, the service first enters the working tunnel of the ring network.
  • the figure shows that two physical links (ie, C->A link and C->D link) of the primary node C in the ring-entry network are faulty, and are in the ring-out network.
  • a physical link ie, C->E link
  • fails; the switching process at this time is:
  • the path between the node A and the node C on the working tunnel is faulty when it is transmitted through the working tunnel, and the switch is switched to the protection tunnel corresponding to the working tunnel.
  • the protection tunnel reaches the D point through the node B, due to the CD
  • the standby node performs a cross-ring switching action to exit the service tunnel carried on the protection tunnel.
  • the service enters the ring network on the backup node D. After entering the ring network, the service first enters the working tunnel of the ring network.
  • the figure shows that two physical links of the primary node C in the ring-entry network (ie, C->A link and C->D link) fail, and are in the ring-out network. Another physical link (ie, C->D link) fails; the switching process at this time is:
  • the path between the node A and the node C on the working tunnel is faulty when it is transmitted through the working tunnel, and the switch is switched to the protection tunnel corresponding to the working tunnel.
  • the protection tunnel reaches the D point through the node B, due to the CD
  • the standby node performs a cross-ring switching action to exit the service tunnel carried on the protection tunnel.
  • the service enters the ring network on the backup node D. After entering the ring network, the service first enters the working tunnel of the ring network.
  • the switchover of the ring network can be implemented in a simple and fast manner without the need to deploy a large number of linear LSPs.
  • the LSP needs to occupy the resources, improve the resource utilization, and simplify the configuration process.
  • the time required for the entire protection switching is verified by the solution of the embodiment of the present invention. It does not exceed 50ms, and the path is consistent after two-way service switching. Therefore, the present invention has strong industrial applicability.

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Abstract

L'invention concerne un procédé et un dispositif de protection de réseau en anneau à double commutation. Le procédé comprend les étapes suivantes : premièrement, établissement d'un tunnel de commutation dans un réseau d'entrée d'anneau, le tunnel de commutation comprenant un tunnel de commutation principal dont la direction s'étend d'un nœud principal à un nœud de secours et dont au moins une partie est directement connectée au nœud principal et au nœud de secours, et un tunnel de commutation de protection de veille dans la direction opposée à celle du tunnel de commutation principal, tous les nœuds dans le réseau en anneau se trouvant sur le tunnel de commutation de protection de veille; et ensuite, lorsque deux liaisons physiques du nœud principal dans un réseau d'entrée d'anneau tombent toutes deux en panne, commutation directe d'un service courant vers le tunnel de commutation établi précédemment, et émission de celui-ci vers le nœud de secours à travers le tunnel de commutation, de manière à entrer dans le réseau de sortie d'anneau au travers du nœud de secours. Selon la solution technique, lorsqu'il est nécessaire de procéder à une commutation croisée de réseaux en anneau, celle-ci peut être réalisée de manière succincte et rapide en utilisant directement un tunnel de commutation configuré dans un réseau d'entrée d'anneau sans déployer un grand nombre de protections LSP linéaire ou configurer un temps de retard de protection linéaire.
PCT/CN2014/088626 2014-06-25 2014-10-15 Procédé et dispositif de protection de réseau en anneau à double commutation WO2015196640A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020177002280A KR101907585B1 (ko) 2014-06-25 2014-10-15 더블 접촉 링 네트워크 보호 방법 및 장치
JP2016575118A JP6408615B2 (ja) 2014-06-25 2014-10-15 二重接続リングネットワーク保護方法及び装置

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