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A method and system for realizing link tracking

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

Active Publication Date: 2019-03-08
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) returned by MIP2 on node SW31 is SW31->SW22->SW1. 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 whether the return transmission path of the LTR returned by each MIP is unimpeded
[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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  • A method and system for realizing link tracking
  • A method and system for realizing link tracking
  • A method and system for realizing link tracking

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 exchanged. By running the connectivity detection function, it is determined that the MEP1 to MEP2 correspond to There is no failure in the specific forward transmission path of Flow ID X. Then, the source maintenance end point initiates flow-based link tracking to the opposite end maintenance end point for path verification to detect the node condition of the Ethernet transmission path from the source maintenance end point to the opposite end maintenance end point. The reason why it is called path verification here, instead of 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 in the Ethernet that supports ECMP. Each node in the network has learned the topology of the enti...

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 exchanged. By running the connectivity detection function, it is determined that the 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 opposite maintenance endpoint for fault location to determine which two nodes are faulty on the Ethernet transmission path from the source maintenance endpoint to the opposite 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. Combine image 3 with Figure 5 ,then Figure 5 The process shown mainly includes the following steps:

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

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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 present invention relates to the field of communications, in particular to a method and system for implementing 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, management and maintenance (Operation, Administration and Maintenance, OAM) working mechanism, and has been used as 802.1 The ag standard is officially released. [0003] The IEEE 802.1ag standard defines OAM functional logical entities in Ethernet, including Maintenance End Point (MEP) located at both ends of the Ethernet transmission path, and Maintenance Intermediate Point (MIP) located in the middle of the Ethernet transmission path. ). Among them, the maintenance endpoint and the maintenance intermediate point are collectively referred to as the maintenance point (Maintenance Point, MP). [0004] Each switch (Switch, SW) in the Ethernet can creat...

Claims

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Application Information

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