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Method, apparatus and system for bidirectional forwarding detection implementation

A two-way forwarding detection, end-to-end technology, applied in the field of communication, can solve the problems of increased workload, increased errors, tedious manual configuration and deletion operation process, etc., to achieve the effect of improving accuracy and reducing complexity

Inactive Publication Date: 2009-05-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corresponding cumbersome manual configuration and deletion process not only increases the workload, but also increases the possibility of errors

Method used

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  • Method, apparatus and system for bidirectional forwarding detection implementation
  • Method, apparatus and system for bidirectional forwarding detection implementation
  • Method, apparatus and system for bidirectional forwarding detection implementation

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0047] In this embodiment one, if figure 2 As shown, the corresponding BFD session establishment process may include:

[0048] First, the active end sends a BFD control message with BFD YD=0 to the passive end, where YD refers to: the remote descriptor (your discriminator), and the corresponding BFD control message can specifically be carried on IP / UDP (User Datagram Protocol ) sent in the message;

[0049] Afterwards, after receiving the BFD YD=0 message sent by the active end, the passive end establishes a BFD session corresponding to the passive end, thereby implementing bidirectional detection based on the BFD session.

[0050] Among them, the detection information used to uniquely determine a BFD session required for the passive end to establish a BFD session can be obtained from the IP / UDP packet header sent by the active end, and the corresponding detection information can include source address, destination address, Information such as VPN information and UDP port n...

Embodiment 2

[0053] The second embodiment is an improvement on the first embodiment, so that the IP-based message carrying the BFD control message transmitted during the establishment of the BFD session will not affect network security.

[0054] Specifically, in the second embodiment, in the process of sending the BFD control message with BFD YD=0 at the active end, the TTL (time-to-live value) and the port number can be combined on the single-hop link. Verify to ensure the security of the network.

[0055] In the second embodiment, for a multi-hop link, the LSP Ping can be used to trigger the passive end to establish a BFD session, and the combination of TTL and port number can be used for verification, so as to ensure the security performance of the network. like image 3 As shown, the corresponding specific implementation process includes:

[0056] First, when it is determined to be a multi-path link, the corresponding active end triggers the execution of the LSP Ping function, and se...

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Abstract

A method, device and system for implementing bidirectional relay and detection mainly comprise: transmitting from service configuration terminal to last node of service the message carrying BFD information for bidirectional relay and detection; the last node of service receives the message and triggers to establish BFD session according to the message and implements bidirectional relay and detection; the BFD message comprises message for establishing BFD session. In the inventive embodiment, manual configuration operation is not needed for establishing BFD session at last node of service, and information sent by service configuration terminal triggers corresponding processing course for establishing BFD session so as to perform bidirectional detection processing between service configuration terminal and last node of service to reduce complexity and promote accuracy of bidirectional relay and detection process.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a technology for realizing bidirectional forwarding detection. Background technique [0002] In the field of communication technology, BFD (Bidirectional Forwarding Detection) is a fast detection mechanism that can perform fault detection on any type of channel between systems. The corresponding channel can include direct physical links, virtual circuits, tunnels, MPLS LSP (label switching path based on multi-protocol label switching), multi-hop routing channels, and indirect channels, etc. [0003] The BFD technology can provide light-load and short-duration detection for channel faults between adjacent forwarding engines. The BFD technology can detect network reachability and provide reachability status information for the application layer, such as UP (reachable) or DOWN (unreachable) information. [0004] During the detection process using the BFD technology, after th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/24H04L12/56H04L12/46
Inventor 吴丽娜熊怡孙永乐孙明亮秦利琴
Owner HUAWEI TECH CO LTD