Link fault protection switching method and device under ECMP mode

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

Active Publication Date: 2014-02-26
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 wil

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  • Link fault protection switching method and device under ECMP mode
  • Link fault protection switching method and device under ECMP mode
  • Link fault protection switching method and device under ECMP mode

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Example Embodiment

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

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Abstract

The invention discloses a link fault protection switching method and a device under an ECMP mode. The method comprises that: a flow hash value is obtained by a home terminal device via traversing a first flow hash list; the home terminal device sends a first CCM to an opposite terminal device via a corresponding path of the flow hash value; the opposite terminal device utilizes receiving situation of the first CCM to confirm whether a fault occurs in the corresponding path of the flow hash value; When the fault occurs in the corresponding path of the flow hash value, the home terminal device receives a second CCM from the opposite terminal device; the home terminal device deletes the corresponding flow hash value of a fault path from a second flow hash list; and the corresponding flow has value is matched in the second flow hash list by the home terminal device via utilizing information of a business message, and the business message is sent to the opposite terminal device via the corresponding path of the flow hash value. In the embodiment of the invention, fault shifting time is shortened, cutoff of flow is avoided and businesses are ensured not to be 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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IPC IPC(8): H04L12/24H04L12/703H04L45/28
Inventor 杨裕斌
Owner NEW H3C TECH CO LTD
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