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Label checking method and system

An inspection method and label technology, applied in the field of data communication, can solve problems such as label inconsistency and label mismatch, and achieve the effect of eliminating potential safety hazards and avoiding label mismatch

Inactive Publication Date: 2010-12-29
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first purpose of the present invention is to provide a label checking method for checking labels between upstream and downstream routers in order to avoid label inconsistencies between adjacent routers in the MPLS network and potential safety hazards in the prior art. When the labels do not match

Method used

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  • Label checking method and system

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 and figure 2 As shown, the first embodiment of the present invention is a label checking method initiated by an upstream router in an MPLS network, triggering before the upstream router sends a data packet or timing triggering label checking according to actual needs, including the following steps:

[0022] Step 22, the query module 602 generates a tag query message and sends it to the matching module 604, the tag query message includes the tag value stored in the upstream router 82 to a certain destination address;

[0023] Each module in this embodiment can be set independently. Or the query module 602 , update module 606 and confirmation module 608 are set in the upstream router 82 , and the matching module 604 is set in the downstream router 84 .

[0024] Step 24, the matching module 604 generates a tag matching message according to th...

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PUM

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Abstract

The invention discloses label checking method and system. The label checking method comprises the steps of: judging whether the label of a downstream router is consistent with that of an upstream router according to label matching information generated by the downstream router; and updating the label of the upstream router when the labels of the upstream router and the downstream router are consistent. In the label checking method and system, by carrying out matching checking on the label of the upstream router and the label of the downstream router, the occurrence of mismatching labels can be prevented, and the label of the upstream router can be repaired after the mismatching label phenomenon is found so as to ensure that the label of the upstream router and the label of the downstream router are consistent, the business loaded by the routers can be carried out successfully, and the hidden danger in the routers can be eliminated.

Description

technical field [0001] The invention relates to a data communication technology, in particular to a label checking method and system. Background technique [0002] At present, more and more operators have built large-scale backbone IP networks using the MPLS protocol to provide end-to-end virtual channels for IP-based voice services. The label is used as the data exchanged hop by hop in the virtual channel. For the same destination address in the entire channel, the outgoing label of the previous hop router and the incoming label of the next hop router must be consistent, otherwise the virtual channel will be interrupted. . [0003] The LDP protocol is currently the main label distribution protocol. It is responsible for label generation, interaction, cancellation and other operations. According to the protocol, when a new route is found in its own routing table entry, the downstream router will use the LDP protocol to generate a label to the destination address, and info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L1/16H04L12/56H04L29/06H04L45/50
Inventor 樊川
Owner CHINA MOBILE COMM GRP CO LTD