Multi-link failure processing method and label switching router

A label-switched path and multi-link technology, applied in the processing method of multi-link failure, label-switched routers, and routing protocol fields, which can solve the problem that service flows cannot be transmitted normally.

Inactive Publication Date: 2010-02-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when multiple upstream links fail, within a state timeout interval, the MP node may receive the Path message of the protected LSP from multiple LSPs, such as from two backup paths at the same time, or Receive the Path message of the protected LSP from the main path and a backup path at the same time
At this time, the existing MP cannot determine from which path to send the Resv message of the protected LSP, so as to ensure that the state of the LSR on the effective traffic forwarding path, that is, the PLR, is refreshed, so that the service flow can Can't get normal transmission

Method used

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  • Multi-link failure processing method and label switching router
  • Multi-link failure processing method and label switching router
  • Multi-link failure processing method and label switching router

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] When the LSR receives the Path message of the protected LSP along multiple paths, the multi-link failure processing method provided by the embodiment of the present invention sends the Resv message of the protected LSP along multiple paths.

[0032] When the LSR receives the Path message from the two backup paths, it sends the Resv message of the protected LSP along the two backup paths.

[0033] When the LSR receives the Path message of the protected LSP from the main path and a backup path, it sends the Resv message of the protected LSP along the main path and the backup path.

[0034] As mentioned above, the Resv message of the protected LSP is sent along multiple paths, and the path for sending the Resv message of the...

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PUM

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Abstract

The method includes steps: receiving route information of switching routes of multiple protected labels; the said route information of switching routes of multiple protected labels from multiple different routes; transmitting prestored switching routes of multiple protected labels along the said multiple routes. The invention also discloses a label switching router. Under condition of multiple links in failure, the invention guarantees that prestored states for nodes on route for forwarding effective flow are updated in time so as to ensure normal transmission of traffic flow.

Description

technical field [0001] The invention relates to routing protocol technology in the field of network communication, in particular to a multi-link failure processing method and a label switching router. Background technique [0002] Extended Resource Reservation Protocol (RSVP, Resource Reservation Protocol) is one of the solutions for realizing Multiprotocol Label Switching (MPLS, Multiprotocol Label Switching) engineering. Extended RSVP sends path (Path) messages from the ingress node of the MPLS domain, that is, the ingress label switching router (LSR) to the downstream LSR hop by hop, and the LSR that receives the Path message processes the Path message, including creating a corresponding label switching path (LSP) The path state block (PSB) of the path state block (PSB), the IP address information of the ingress node of the LSP and the IP address information of the last hop along the LSP are stored in the PSB. After the Path message is sent to the egress LSR of the MPLS ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L12/56H04L29/06H04L45/50
Inventor胡毅
OwnerHUAWEI TECH CO LTD