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Method for ensuring bidirectional forwarding detection reliability and label switching path equipment

A technology of label switching path and bidirectional forwarding detection, applied in the field of IP network communication, which can solve the problems of abnormal BFD detection and incomplete detection definition.

Active Publication Date: 2012-07-11
ZTE CORP
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Problems solved by technology

[0012] The present invention provides a method for ensuring the reliability of bidirectional forwarding detection and label switching path equipment, which solves the problem of abnormal BFD detection in some scenarios caused by the incomplete definition of MPLS LSP BFD detection in the current standard

Method used

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  • Method for ensuring bidirectional forwarding detection reliability and label switching path equipment
  • Method for ensuring bidirectional forwarding detection reliability and label switching path equipment
  • Method for ensuring bidirectional forwarding detection reliability and label switching path equipment

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specific Embodiment

[0046] exist figure 2 In the networking diagram shown, the system for establishing BFD detection for an MPLS LSP tunnel includes a source LSP device and a sink LSP device. The source device and the sink device proposed in the embodiment of the present invention are the same, and the source device is The active device initiated by the MPLS LSP BFD, and the sink device as the passive device initiated by the MPLS LSP BFD; the embodiment of the present invention expands the MPLS LSP Ping message, and uses the MPLS Router ID TLV described in the MPLS LSP Ping message.

[0047] For ease of description the following steps are figure 2 The network diagram shown is used for description, still taking the source LSP device and the sink LSP device as examples, including the following steps:

[0048] Step S1, the source LSP device, as the active party of MPLS LSP BFD, actively initiates BFD detection;

[0049] In step S2, the source LSP device constructs an MPLS LSP Ping request messag...

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Abstract

The invention discloses a method for ensuring bidirectional forwarding detection reliability and label switching path equipment. Source end equipment transmits a multiprotocol label switching (MPLS) label switching path (LSP) PING request message carrying route identification information to host end equipment, and the host end equipment uniquely determines bidirectional forwarding detection (BFD) session according to the route identification information in the MPLS LSP PING request message and forwarding equivalence class (FEC). In the invention, the existing MPLS LSP Ping standard RFC4379 is expanded, and MPLS Router ID TLV (Threshold Limit Value) is added for carrying the parameter (i.e. Router ID) for uniquely determining the BFD session. On the basis of being compatible with the existing standard, the method in the invention proposes a complete solution of LSP BFD, and the problem of abnormal BFD session detection is solved in case that the forwarding path varies in the existing solution.

Description

technical field [0001] The invention relates to the technical field of IP network communication, in particular to a method for ensuring reliable bidirectional forwarding detection and label switching path equipment. Background technique [0002] An increasingly important requirement in terms of network equipment reliability is that communication failures between adjacent systems are required to be quickly detected. In this way, a backup path can be established faster or switched to other links when a fault occurs. [0003] The appearance of the bidirectional forwarding detection (Bidirectional Forwarding Detection, BFD for short) protocol proposes a solution to the above requirements. BFD technology provides a general, medium-independent fast fault detection mechanism, which can detect any type of path between systems for each layer. These channels include direct links, multi-hop paths, Multiprotocol Label Switching (Multiprotocol Label Switch, MPLS for short) Label Switch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/26H04L45/50
Inventor 张丽晖罗曙晖郭剑陈娟娟
Owner ZTE CORP
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