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Method, system and equipment for establishing bidirectional forwarding detection (BFD) for bidirectional LSP

A bidirectional forwarding detection and equipment technology, applied in the field of network communication, can solve the problems of incapable of bidirectional LSP real-time fault detection, prolongation of protection switching time, etc., and achieve the effect of meeting real-time business requirements

Inactive Publication Date: 2012-10-17
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0006] The embodiment of the present invention provides a method, system and equipment for establishing BFD detection for bidirectional LSP, which solves the problem that there is no BFD detection mechanism for bidirectional LSP in the prior art, and it is impossible to perform real-time fault detection for bidirectional LSP, which leads to protection after failure. The switching delay is long, which cannot meet the needs of users

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  • Method, system and equipment for establishing bidirectional forwarding detection (BFD) for bidirectional LSP
  • Method, system and equipment for establishing bidirectional forwarding detection (BFD) for bidirectional LSP
  • Method, system and equipment for establishing bidirectional forwarding detection (BFD) for bidirectional LSP

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Embodiment Construction

[0022] Such as figure 1 As shown, it is a schematic diagram of a bidirectional LSP in an MPLS network according to an embodiment of the present invention. In an MPLS network, a PE router is a main device responsible for managing users and establishing LSP connections. From the perspective of effective data transmission, a two-way LSP is to bind two unidirectional LSPs with opposite directions between two nodes, that is, the first LSP from the source device to the sink device and the second LSP from the sink device to the source device. The LSP is bound as a bidirectional LSP. The embodiment of the present invention proposes a source device and a sink device only for ease of understanding, but in practice a PE device may be either a source device or a sink device. Therefore, a PE device has both the function of the source PE device and the function of the sink device.

[0023] Such as figure 2 As shown, it is a flowchart of an embodiment of a BFD detection method for a bidi...

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Abstract

The embodiment of the invention provides a method for establishing bidirectional forwarding detection (BFD) for bidirectional LSP. The bidirectional LSP is positioned between a source equipment and a sink equipment and composed of a first LSP and a second LSP. The method includes that receive the LSP Ping message transmitted by the source equipment and carrying an operation mark and the only mark of the first LSP in the network; search the direction mark transmitted by a second LSP according to the only mark of the first LSP in the network, create BFD dialogue based on the direction mark transmitted by the second LSP and establish the BFD for the bidirectional LSP.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method, system and equipment for establishing bidirectional forwarding detection for a bidirectional LSP. Background technique [0002] With the development of communication technology, how to quickly detect communication failures between adjacent systems, and how to quickly establish alternative channels or switch to other links when a failure occurs has become an urgent problem to be solved. BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection), as a fast detection mechanism, came into being. BFD is gradually developed from the basic transmission technology. It can be used to detect the correctness of various types of transmissions including Ethernet, MPLS (Multiprotocol Label Switch, Multiprotocol Label Switching) paths, common routing encapsulation, and IPSec tunnels. sex. BFD can quickly detect the connectivity status with neighboring nodes, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/56
Inventor 秦利琴孙永乐吴丽娜孙明亮
Owner HUAWEI TECH CO LTD
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