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Fault detection method and business provider edge (PE) equipment

A fault detection and equipment technology, applied in the field of network communication, which can solve the problems of VPN instance service interruption, failure to start a backup link, and PE1 equipment not being able to learn, and achieve the effect of avoiding service interruption.

Active Publication Date: 2011-09-21
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the private network access link D at the peer end fails, PE1 cannot learn about it, and cannot start the backup link PE1-P2-PE3-CE2, causing service interruption of the corresponding VPN instance.

Method used

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  • Fault detection method and business provider edge (PE) equipment
  • Fault detection method and business provider edge (PE) equipment
  • Fault detection method and business provider edge (PE) equipment

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The method provided by the present invention mainly includes: the peer PE device periodically sends a BFD message whose destination IP address is the private network interface address of the local PE device through the private network interface of the VPN instance; If the BFD message is not received within the time, it is determined that the peer private network access link or public network link of the VPN instance is faulty.

[0026] When it is determined that the peer private network access link or public network link of the VPN instance fails, the backup link of the VPN instance can be further enabled on the local PE device.

[0027] Among them, when the peer private network access link fails, the backup link can be an integral link com...

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Abstract

The invention provides a fault detection method and business provider edge (PE) equipment, applied in a multi-protocol label switching virtual private network (MPLS VPN). The method comprises the following steps: an opposite-end PE periodically transmits a destination IP address through a private network interface of a VPN (Virtual Private Network) example to serve as the bidirectional forwarding detection (BFD) message of a private network interface address of a local-end PE, and determines that a fault occurs on an opposite-end private access link or a public network link of the VPN example if the local-end PE does not receive the BFD message in the set time period. Accordingly, the local-end PE can know that a fault occurs in the opposite-end private network access link so as to start a backup link in time to obviate the business interruption of the corresponding VPN example.

Description

technical field [0001] The invention relates to network communication technology, in particular to a fault detection method and service provider edge equipment. Background technique [0002] Multi-Protocol Label Switching (MPLS) technology has achieved considerable development due to its advantages such as fast forwarding, QoS guarantee, and multi-service support, and it is playing an increasingly important role in the next generation of telecommunication networks. The typical networking of multiprotocol label switching virtual local area network (MPLS VPN) is as follows: figure 1 As shown, the service provider edge (PE) device is the access device of the MPLS VPN service, and maintains the forwarding information of the private network users, that is, each VPN forwarding table. As the core equipment of the MPLS network, the backbone (P) router only needs to have the basic MPLS forwarding capability, and does not maintain VPN forwarding information. The private network pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26
Inventor 俞国平叶金荣
Owner NEW H3C TECH CO LTD
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