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Method and apparatus for detecting malfunction

A technology of fault detection and equipment, applied in the field of communication

Inactive Publication Date: 2011-04-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, both devices are required to support BFD sessions, and BFD fault detection cannot be performed when only one side supports BFD sessions.

Method used

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  • Method and apparatus for detecting malfunction
  • Method and apparatus for detecting malfunction
  • Method and apparatus for detecting malfunction

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Experimental program
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Embodiment Construction

[0023] 101. Set the detection message sending cycle as the minimum message sending interval, and set the detection cycle as the multiplication of the detection multiple and the minimum message receiving interval. The minimum packet sending interval may be equal to the minimum packet receiving interval, or may be set differently according to actual needs.

[0024] The format of the detection message is as follows: figure 2 As shown, including: Vers: BFD protocol version number; Diag: diagnostic word, indicating the reason for the last session down of the local BFD system; Sta: local BFD status; , ask the other party to confirm and respond immediately. Otherwise, the other party is not requested to confirm and respond; F: The F flag must be set in the response message in response to the P flag setting; C: The forwarding / control separation flag, once set, changes in the control plane will not affect BFD detection. For example, if the control plane is ISIS, when ISIS restarts, ...

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Abstract

The invention discloses a fault detection method and a device, including that a detection message is transmitted to a second device according to the preset message transmit cycle; the source address and the destination address of the detection message are the device address of the device which transmits the detection message; the next hop address is the address of the second device; when no detection message returns within the preset detection cycle, the communication between the device which transmits the detection message and the second device fails. In the fault detection method and the device, both of the BFD session sides are not needed to support the BFD bilaterally; the BFD session can be created on one side for the BFD fault detection, realizing the fault detection between the device which supports the BFD and the device which can not support the BFD.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a fault detection method and equipment. Background technique [0002] With the development of communication technology, how to quickly detect communication failures between adjacent systems, and how to establish alternative channels or switch to other links when a failure occurs has become an important problem to be solved urgently. At present, many hardware or software cannot provide this function. For example, Ethernet cannot implement path detection, and forwarding engines or interfaces cannot implement end-to-end detection. In order to solve the above problems, a fast detection mechanism BFD (Bidirectional Forwarding Detection, bidirectional forwarding detection) is proposed in the prior art. Services provided by BFD include detecting network reachability and providing reachability status information for the application layer, such as UP or DOWN (normal operation or f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/26H04L12/24
Inventor 石勇张炜吴丽娜王朋汪祖亮
Owner HUAWEI TECH CO LTD