VLL fault detection method and device

A fault detection and fault technology, which is applied in the communication field, can solve the problems of occupying physical links, failing to detect whether the link between PE2 and CE2 is faulty, and affecting the normal operation of other services, so as to achieve the effect of improving reliability

Active Publication Date: 2013-01-02
XINHUASAN INFORMATION TECH CO LTD
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AI Technical Summary

Problems solved by technology

When BFD for LSP is used to detect the fault of the main VC link between PE1 and PE2, the physical link between PE 1 and PE 2 will be occupied, affecting the normal operation of other services. The link between PE 1 and PE 2 is faulty, but the link between PE2 and CE 2 cannot be detected.

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  • VLL fault detection method and device
  • VLL fault detection method and device
  • VLL fault detection method and device

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Embodiment Construction

[0040] Aiming at the above-mentioned problems in the prior art, the embodiment of the present invention provides a technical solution for VLL fault detection, which can be applied to an MPLS L2VPN including multiple PE nodes and CE nodes. In this technical solution, fault detection is performed on a specific PW between PE nodes, and the VLL can be notified of the switchover between the active and standby links without affecting other services carried on the public network link between the PEs. It can implement link fault detection on the PW between PEs and the AC between PE and CE at the same time, which improves the reliability of fault detection.

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. ex...

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Abstract

The invention discloses a VLL (virtual leased line) fault detection method and device. The method comprises the following steps of: sending BFD (bidirectional forwarding detection) messages to a PE (provider edge) node at an opposite end by a local PE (provider edge) node, wherein the BFD messages are provided with an original MAC (media access control) address used for marking a PW (pseudo wire) and marking information used for marking the BFD messages as special BFD messages; and determining PW or / and AC faults when the value of the time within which the local PE node does not receive the response message of the BFD messages is larger than a threshold value. According to the method and the device, the influence to a public network link and other services among the PE nodes is lowered during the VLL (virtual leased line) fault detection, and the fault detection to PWs among the PE nodes and the fault detection to AC (alternating current) between a PE (provider edge) and a CE (customer edge) can be realized.

Description

technical field [0001] The invention relates to the communication field, in particular to a VLL fault detection method and equipment. Background technique [0002] MPLS L2VPN (Multi-Protocol Label Switching Layer 2 Virtual Private Network) supports VC (Virtual Circuit, virtual circuit) protection function. Such as figure 1 As shown, two VC connections are established between CE (Customer Edge, user network edge) 1 and CE2: a primary VC connection and a backup VC connection. Under normal circumstances, CE 1 only uses the main VC connection to communicate with CE 2; when PE (Provider Edge, service provider network edge) 1 detects that the main VC connection fails, PE 1 will enable the backup VC connection, that is, PE 1 passes The backup connection forwards the packets from CE 1 to CE 2. After receiving the packets, CE 2 updates the MAC address entry so that the packets sent from CE 2 to CE 1 are also forwarded through the backup VC connection, ensuring uninterrupted communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/709H04L12/26H04L45/243
Inventor 钟晋明李树奎
Owner XINHUASAN INFORMATION TECH CO LTD
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