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Method, system and device for building bidirectional forwarding detection

A bidirectional forwarding detection and equipment technology, applied in the field of network communication, can solve the problems of prolonged LSP protection switching and inability to directly switch traffic, etc., and achieve the effect of meeting real-time business requirements

Inactive Publication Date: 2009-06-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides a method, system and device for establishing BFD detection, which solves the problems in the prior art that the sink device cannot directly perform traffic switching after sensing an LSP failure, and the LSP protection switching delay is relatively long

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  • Method, system and device for building bidirectional forwarding detection
  • Method, system and device for building bidirectional forwarding detection

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Embodiment Construction

[0024] like figure 2 As shown, it is a schematic diagram of a typical networking of an MPLS network according to an embodiment of the present invention. In the MPLS network, the PE (Provider Edge, backbone network edge) router is the main device, responsible for managing users and establishing LSP connections between PEs; CE (Customer Edge, user edge) distributes user network routes, and CE can be a router , which can also be a switch or a host. Traffic enters from the primary LSP and standby LSP of the source device (PE1) at the same time. Normally, the sink device (PE2) receives traffic on the primary LSP.

[0025] 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. For example in figure 2 In the case of CE1 traffic access, PE1 ...

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Abstract

The invention provides a method for building bidirectional forwarding detection. The method comprises the following steps: receiving a label switched path LSP Ping message which contains a unique identifier of LSP in a network and a BFD Discriminator; searching for an LSP local identifier according to the unique identifier in the network; binding the BFD session with the LSP local identifier; sending a BFD negotiation message; and building BFD detection for LSP. In the embodiment of the invention, the source terminal in the LSP Ping message contains the unique identifier in the network, and the termination terminal binds the BFD session with the LSP local identifier so as to trigger LSP protection switching quickly when a fault occurring to the LSP is detected, realize quick business convergence and meet the real-time business requirement of a user.

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. 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 important problem to be solved urgently. BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection), as a fast detection mechanism, came into being. BFD is gradually developed from the basic transmission technology, so it can detect faults at all layers of the network. It can be used to detect the correctness of various types of transmission including Ethernet, MPLS (Multiprotocol Label Switch, Multiprotocol Label Switching) paths, common routing encapsulation and IPSec tunnels. BFD is developed by the IETF and can q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/56H04L29/06
CPCH04L12/2602H04L45/50H04L43/00H04L45/026H04L45/28H04L45/00
Inventor 秦利琴孙永乐吴丽娜孙明亮
Owner HUAWEI TECH CO LTD
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