Huawei NetEngine80E Configuration Manual - Reliability page 668

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HUAWEI NetEngine80E/40E Router

Configuration Guide - Reliability

Figure 8-27 Association between EFM and detection protocols

On the network shown in

and MPLS OAM are deployed to detect link connectivity. The link CE5-CE4-CE1-PE2-PE4 is

used as an example. Before association between EFM and detection protocols is configured, the

following situations occur:

To address the preceding problems, association between EFM and detection protocols can be

configured so that faults can be reported to remote devices. This association enables network

administrators to dynamically understand link status based on alarm information and rectify

faults in time.

Issue 02 (2014-09-30)

If the link between CE5 and CE4 goes faulty, CE1 cannot detect the fault. As a result, return

traffic continues to be forwarded to CE4.

If the link between PE2 and PE4 goes faulty, CE1 cannot detect the fault. As a result,

services are interrupted.

If the link between CE1 and PE2 goes faulty, PE4 cannot detect the fault. As a result, a

large volume of unnecessary traffic continues to be forwarded to PE4.

lists associations between EFM and protocols and their usage scenarios.

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8-27, multiple detection protocols such as EFM, BFD, CFM,

8 Ethernet OAM Configuration

Netengine40e