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Method and system for realizing link tracing

A link tracking and sending link technology, applied in the field of communication, can solve different problems, it is difficult to ensure that the LTR return transmission path is smooth, and the purpose of the link tracking function is difficult to achieve, etc.

Active Publication Date: 2013-06-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the transmission paths of LTM and LTR carrying the same Flow ID may also be different. In this example, the path of LTM (Flow ID X) is SW1->SW21->SW31->SW41->SW5, node SW21 The path of LTR1 (Flow ID X) returned by MIP1 on node SW21->SW1, the path of LTR2 (Flow ID X) returned by MIP2 on node SW31 is SW31->SW22->SW1, and the path of LTR2 (Flow ID X) on node SW41 The path of LTR3 (Flow ID X) returned by MIP3 is SW41->SW32->SW23->SW1, so in this example, the CCM from MEP2 to MEP1 cannot detect the return transmission path of the LTR returned by each MIP. Is it smooth?
[0018] It can be seen that in the ECMP Ethernet environment, when the link tracking mechanism in the prior art is used to complete the flow-based link tracking function, it is difficult to ensure that the return transmission path passed by the LTR is smooth, resulting in the purpose of the link tracking function hard to reach

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  • Method and system for realizing link tracing
  • Method and system for realizing link tracing
  • Method and system for realizing link tracing

Examples

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Embodiment 1

[0077]In this embodiment, the flow-based connectivity detection function is run between the source maintenance endpoint and the peer maintenance endpoint, and CCM messages carrying Flow ID X are periodically sent to each other. By running the connectivity detection function, it is determined that MEP1 to MEP2 correspond to The specific forward transmission path of Flow ID X is not faulty. Then, the source maintenance endpoint initiates flow-based link tracking to the peer maintenance endpoint for path verification, so as to detect the nodes passed by the Ethernet transmission path from the source maintenance endpoint to the peer maintenance endpoint. The reason why it is called path verification here, rather than the path discovery in the 802.1ag standard, is because the 802.1Qbp standard draft (version D0.1) stipulates that the IS-IS routing protocol must be run on the Ethernet supporting ECMP, and the network Each node in the network has learned the topology of the entire ne...

Embodiment 2

[0088] In this embodiment, the flow-based connectivity detection function is run between the source maintenance endpoint and the peer maintenance endpoint, and CCM messages carrying Flow ID X are periodically sent to each other. By running the connectivity detection function, it is determined that MEP1 to MEP2 correspond to The specific forward transmission path of Flow ID X is faulty. Then, the source maintenance endpoint initiates flow-based link tracking to the peer maintenance endpoint for fault location to determine which two nodes are faulty on the Ethernet transmission path from the source maintenance endpoint to the peer maintenance endpoint .

[0089] see Figure 5 , Figure 5 It is a schematic diagram of a link tracking process for fault location according to an embodiment of the present invention. to combine image 3 and Figure 5 ,but Figure 5 The process shown mainly includes the following steps:

[0090] Step 501: The source maintenance endpoint MEP1 dete...

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Abstract

The invention discloses a method and a system for realizing link tracing. A maintenance intermediate point which receives link tracing messages sent by a source maintenance end point replies link tracing response messages to the source maintenance end point according to the number of equivalent returning transmission paths from the maintenance intermediate point to the source maintenance end point, all the link tracing response message carry flow labels with different return transmission paths and when a plurality of link tracing response messages replied by the maintenance intermediate point are received, the source maintenance end point only processes one link tracing response message replied by the maintenance intermediate point. Both the method and the system can avoid influences brought by the fact that the returning transmission paths which the link tracing response messages pass are unsmooth as far as possible so as to realize the link tracing function directing at forward transmission paths in equivalent multiple-path scenes.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for realizing link tracking. Background technique [0002] In the current Ethernet, the standard organization Institute of Electrical and Electronics Engineers (IEEE) has formulated a set of Ethernet operation, administration and maintenance (OAM) working mechanism, and has been adopted as The 802.1ag standard was officially released. [0003] The IEEE 802.1ag standard defines the logical entity of the OAM function in Ethernet, including the Maintenance End Point (MEP) located at both ends of the Ethernet transmission path, and the Maintenance Intermediate Point (MIP) located in the middle of the Ethernet transmission path ). Wherein, the maintenance end point and the maintenance intermediate point are collectively referred to as a maintenance point (Maintenance Point, MP). [0004] Each switch (Switch, SW) in the Ethernet can create an MP based on the port. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/28
Inventor 肖敏
Owner ZTE CORP