A protection switching method and device for link failure in ECMP mode

A link failure and protection switching technology, applied in the communication field, can solve problems such as long service recovery time

Active Publication Date: 2018-04-06
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when a link or an intermediate device on a path connecting two devices fails, before the topology reconverges, even if there are other equal-cost paths available in the network, the services of the faulty path will appear. Interruption, and the topology convergence time depends on factors such as the number of nodes in the SPB network, topology type, fault type, fault location in the topology, etc., so the service recovery time is relatively long

Method used

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  • A protection switching method and device for link failure in ECMP mode
  • A protection switching method and device for link failure in ECMP mode
  • A protection switching method and device for link failure in ECMP mode

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Embodiment Construction

[0050] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a protection switching method for a link failure in the ECMP mode, which is applied to a network (such as an SPB network) including a local device and a peer device, and this There are multiple equal-cost paths between the end device and the peer device. figure 1 It is a schematic diagram of the application scenario of the embodiment of the present invention. The local device is device A, and the peer device is device E. There are three equivalent paths between device A and device E, namely path 1 (device A, device B, device E ), path 2 (device A, device C, device E), path 3 (device A, device D, device E).

[0051] In the above application scenarios, such as figure 2 As shown, the protection switching method includes the following steps:

[0052] In step 201, the local device obtains the flow hash value by traversing the first flow hash table, and sends the first CCM to...

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Abstract

The invention discloses a protection switching method and equipment for link failure in ECMP mode. The method comprises: the local device obtains the flow hash value by traversing the first flow hash table; The end device sends the first CCM; the peer device determines whether the path corresponding to the flow hash value is faulty by using the receiving condition of the first CCM; when the path corresponding to the flow hash value fails, the local device receives the information from the peer The second CCM of the terminal device; the local device deletes the flow hash value corresponding to the faulty path from the second flow hash table; the local device uses the information of the service message to match from the second flow hash table corresponding flow hash value, and send the service packet to the peer device through the path corresponding to the flow hash value. In the embodiment of the present invention, the failover time is shortened, the flow interruption is avoided, and the service is not interrupted.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a protection switching method and equipment for link failure in ECMP (Equal Cost Multiple Paths, Equal Cost Multiple Paths) mode. Background technique [0002] SPB (Shortest Path Bridging, the shortest path bridge) supports two different ways to achieve traffic load sharing. (1) ECT (Equal Cost Tree, Equivalent Path Tree) VLANs (Virtual Local Area Network, Virtual Local Area Network): By mapping service instances to B-VLAN (operator virtual local area network), and then according to the ECT specified by the B-VLAN The algorithm selects an SPT tree from the SPT (Shortest Path Tree, shortest path tree) collection, so that different service instances can be mapped to different B-VLANs, so as to realize traffic load sharing. (2) ECMP: In this ECMP mode, a path is dynamically selected from a group of equal-cost paths when unicast traffic is forwarded. Among them, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/703
Inventor 杨裕斌
Owner NEW H3C TECH CO LTD
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