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Method for transmitting reverse bidirectional forwarding detection (BFD) messages, method for notifying paths and device for notifying paths

A technology of message sending and reverse path, which is applied in the field of communication and can solve problems such as business interruption

Inactive Publication Date: 2012-08-01
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for sending a reverse bidirectional forwarding detection message, a method and a device for notifying the forward bidirectional forwarding detection The defect of service interruption between the source end and the sink end when the reverse path adopted by the BFD message fails

Method used

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  • Method for transmitting reverse bidirectional forwarding detection (BFD) messages, method for notifying paths and device for notifying paths
  • Method for transmitting reverse bidirectional forwarding detection (BFD) messages, method for notifying paths and device for notifying paths
  • Method for transmitting reverse bidirectional forwarding detection (BFD) messages, method for notifying paths and device for notifying paths

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Embodiment Construction

[0026] The embodiment of the present invention is applicable to an LSP network based on a Label Distribution Protocol (LDP for short) or a Resource Reservation Protocol traffic engineering (RSVP for short), where the sending path of a BFD message is unidirectional. .

[0027] figure 1 It is a flowchart of a method for sending a reverse BFD packet provided by an embodiment of the present invention. Such as figure 1 As shown, this embodiment includes:

[0028] Step 11: In the process of establishing a BFD session with the source, the sink receives the BFD trigger message carrying the forward path information sent by the source; the forward path information is the address of the node indicating the forwarding BFD message Information about ordered paths composed in forwarding order.

[0029] For example, the source end and the sink end may be routers and other network devices capable of forwarding packets. The source end is the device that generates and sends the message, and...

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Abstract

The invention provides a method for transmitting reverse bidirectional forwarding detection (BFD) messages, a method for notifying a forward BFD message path and a device for notifying the forward BFD message path. The method for transmitting the reverse BFD messages comprises the steps that in the process of establishing a BFD conversation with a source end, a sink end receives a BFD trigger message carrying forward path information, which is transmitted by the source end; the forward path information refers to information of an ordered path formed by addresses representing nodes for forwarding the forward BFD messages according to a forwarding sequence; and after establishing the BFD conversation with the source end, the sink end transmits the reverse BFD messages to the source end through a path opposite to the forward path represented by the forward path information. By adopting the method for transmitting the reverse BFD messages, the method for notifying the forward BFD message path and the device for notifying the forward BFD message path, the phenomenon of interruption of service, which is caused when the forward path from the source end to the sink end do not go wrong but the path adopted for transmitting the reverse BFD messages go wrong, is avoided.

Description

technical field [0001] The embodiments of the present invention relate to communication technologies, and in particular to a method for sending a reverse bidirectional forwarding detection message, a method and a device for notifying a path of a forward bidirectional forwarding detection message. Background technique [0002] In a network deployed with Multi-Protocol Label Switching Traffic Engineering (MPLS TE for short), in order to quickly detect network faults, it is necessary to perform bidirectional forwarding detection based on traffic engineering (Bidirectional Forwarding Detection FOR Traffic Engineering, short for MPLS TE). BFD FOR TE), when a network link or node failure is detected, service path switching can be triggered at the head node, so as to achieve the purpose of protecting services. [0003] The currently implemented BFD FOR TE technology is divided into two modes: static and dynamic. Static BFD FOR TE requires manual binding of BFD packets to Traffic En...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/721
Inventor 郝建武
Owner HUAWEI TECH CO LTD
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