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Fault detection method, communication system and label exchange router

A technology of fault detection and label switching, applied in the field of network communication, to achieve the effect of flexible fault detection

Active Publication Date: 2008-12-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide a fault detection method, a communication system, and a label switching router, so as to overcome the problem in the prior art that BFD message parsing fault detection cannot be performed on multiple nodes

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  • Fault detection method, communication system and label exchange router
  • Fault detection method, communication system and label exchange router
  • Fault detection method, communication system and label exchange router

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Embodiment Construction

[0030] In the embodiment of the present invention, the BFD packet parsing failure detection in the network where MPLS TE is applied is improved, wherein the hop count between the first node and the second node on the main LSP is determined, and the second node is located at the first downstream of the node;

[0031] Encapsulate the BFD message into an MPLS message, and the MPLS message carries the hop number between the first node and the second node;

[0032] sending the MPLS message from the first node along the main LSP;

[0033] The node receiving the MPLS message judges whether the node is the second node according to the hop count, and if so, extracts the BFD message for detection to obtain a fault detection result; otherwise, forwards the MPLS message.

[0034] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] The process of fault detection in this embodiment is as follows image 3 shown, incl...

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Abstract

The invention discloses a failure detection method, a communication system and a label switching router, aiming at overcoming the problem that BFD message analysis failure detection to a plurality of nodes cannot be realized in the prior art. The method comprises the following steps: the hop number between a first node and a second node on a main LSP is determined, and the second node is positioned at the downstream of the first node; a BFD message is encapsulated into a MPLS message which carries the hop number between the first node and the second node; the MPLS message is sent out along the main LSP from the first node; the node receiving the MPLS message judges if the node is the second node according to the hop number, if so, the node extracts the BFD message for detection so as to obtain a failure detection result, otherwise, the node transmits the MPLS message. By adopting the technical proposal of the invention, the failure detection in the MPLS can be more flexible.

Description

technical field [0001] The invention relates to routing switching technology in the field of network communication, in particular to a fault detection method, a communication system and a label switching router. Background technique [0002] MPLS (Multiprotocol Label Switching, multi-protocol label switching) TE (Traffic Engineering, traffic engineering) FRR (Fast ReRoute, fast rerouting) is one of the technologies for realizing local network protection. In a network where MPLS TE is applied, when a link or node fails somewhere, the LSP configured with fast rerouting protection can automatically switch data to the protection link. Rapid response and timely switching are the characteristics of MPLS fast rerouting, which can ensure the smooth transition of service data without causing service interruption. At the same time, the source node of the LSP will try to find a new path to re-establish the LSP, and switch the data to the new path. Before the new LSP is successfully e...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L1/00H04L29/06
CPCH04L69/40H04L45/50H04L43/0823H04L45/00H04L45/28
Inventor 刘光涛
Owner HUAWEI TECH CO LTD
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