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Method, device and system for protecting flow

A technology for protecting devices and traffic, applied in the field of communication, can solve problems such as affecting traffic reliability, and achieve the effect of improving reliability and reducing frequency

Active Publication Date: 2010-02-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a traffic protection method, device, and communication system, which solve the problem of seriously affecting traffic reliability caused by frequent traffic switching when the network is unstable

Method used

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  • Method, device and system for protecting flow
  • Method, device and system for protecting flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An embodiment of the present invention provides a traffic protection method, which is used for a network with multi-protocol label switching (MPLS), where there is a main path for carrying traffic and at least one backup path for protection. In the end-to-end backup path protection mechanism, the primary path and the backup path are LSP (Label SwitchPath, label switching path), in the backup tunnel protection (tunnel protection group) mechanism, the primary path and the backup path are tunnels, of course the The main path and the backup path may also have other forms, not limited to LSP and tunnel.

[0030] Such as figure 1 As shown, the method includes the following steps:

[0031] 101. Detect whether the state of the main path is abnormal, and if it is detected that the state of the main path is abnormal, execute step 102; if it is detected that the state of the main path is not abnormal, execute step 104.

[0032] The abnormality of the main path state may be, but ...

Embodiment 2

[0044] The embodiment of the present invention provides a traffic protection method. In the embodiment of the present invention, the link is an LSP (Label Switch Path, label switching path) as an example, combining image 3 and Figure 4 Describe the method of traffic protection in detail, and explain the protection of the end-to-end backup path, such as Figure 4 As shown, the method includes the following steps:

[0045]Between the LSR (Label Switched Router) of the ingress interface and the egress interface, there is a primary LSP for carrying traffic, and at least one backup LSP for protection; set the priority of the primary LSP and the backup LSP, the priority When the status of the primary LSP carrying traffic is abnormal, the higher standby LSP is preferentially selected as the LSP carrying traffic. In the embodiment of the present invention, the method of traffic protection is specifically described by taking two standby LSPs as an example for the at least one prote...

Embodiment 3

[0063] The embodiment of the present invention provides a traffic protection method. In the embodiment of the present invention, the link is taken as a tunnel as an example, combining Figure 6 and Figure 7 Describe the method of traffic protection in detail, and explain the protection of the backup path of the tunnel protection group, such as Figure 7 As shown, the method includes the following steps:

[0064] In the tunnel protection group, there is a main tunnel for carrying traffic, and at least one backup tunnel for protection; priority is set for the main tunnel and backup tunnel, and the status of the backup tunnel with higher priority is abnormal in the main tunnel carrying traffic , it is preferentially selected as the tunnel carrying traffic. In the embodiment of the present invention, the method of traffic protection is specifically described by taking the at least one protective backup tunnel as an example of two backup channels, and the method of traffic prote...

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PUM

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Abstract

The invention discloses a method, a device and a system for protecting flow, relating to communication field and solving the problem of poor flow reliability caused by frequent switchover of flow. Theinvention comprises a primary path for bearing flow between terminals and at least one standby path for protection; whether the state of the primary path is normal or not is detected, if not, the primary path is switched to the standby path for bearing flow, and the standby path bearing the flow is upgraded as the primary path while the original primary path is degraded as the standby path. The embodiment of the invention is mainly used in the process of data service transmission between terminals in network with an MPLS function.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, device and system for protecting service flow. Background technique [0002] In telecommunication networks, high reliability is always the most basic and critical performance requirement, especially for voice services. The end-to-end protection switching time must be less than 200ms to meet the requirements. In order to meet this standard, it is necessary to provide a rich and reliable TE (Traffic Engineering, traffic engineering) protection solution. MPLS (Multi-Protocol Label Switching, Multi-Protocol Label Switching) TE provides a variety of traffic protection solutions, including end-to-end backup path protection, backup tunnel (tunnel) protection technology, etc. In these protection mechanisms, users must specify a primary path and multiple backup paths. When the primary path fails, service traffic is switched to the backup path; when the primary path recovers, service ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/26H04L12/24
Inventor 李振斌黄永年蒋虎
Owner HUAWEI TECH CO LTD