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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: 2012-12-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0028] In the embodiment of the present invention, an improvement is made on BFD message parsing failure detection in a network where MPLS TE is applied, 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;

[0029] Encapsulate the BFD message into an MPLS message, and the MPLS message carries the hop number between the first node and the second node;

[0030] sending the MPLS message from the first node along the main LSP;

[0031] 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.

[0032] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] The process of fault detection in this embodiment is as follows image 3 sh...

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Abstract

A fault detection method, a communication system, and an LSR are provided herein to overcome the inability of performing BFD packet resolution fault detection for multiple nodes in the conventional art. The method includes: determining a hop count between a first node and a second node on an LSP, where the second node is located downstream of the first node; encapsulating a BFD packet into an MPLS packet that carries information about the hop count between the first node and the second node; sending the MPLS packet from the first node along the active LSP; and judging, by the node that receives the MPLS packet, whether this node is the second node according to the hop count. If this node is the second node, extract the BFD packet for detect, and obtaining a fault detection result. Otherwise, forward the MPLS packet. Through the technical solution provided by the invention, the fault detection is more flexible in the MPLS.

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, Multiprotocol Label Switching) TE (Traffic Engineering, Traffic Engineering) FRR (Fast ReRoute, Fast Rerouting) is one of the technologies for realizing partial 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L1/00H04L29/06
CPCH04L69/40H04L29/14H04L45/50H04L43/0823H04L45/00H04L45/28
Inventor 刘光涛
Owner HUAWEI TECH CO LTD
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