Transmitting Loop Back Messages - Edge-Core ECS4810-12M Layer 2 Management Manual

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Figure 277: Transmitting Link Trace Messages

Use the Administration > CFM (Transmit Loopback) page to transmit

Loopback Messages (LBMs). These messages can be used to isolate or

verify connectivity faults by submitting a request to a target node (i.e., a

remote MEP or MIP) to echo the message back to the source.

These parameters are displayed:

Check the results in the Link Trace cache (see

"CFM Commands" on page 1093

Loopback messages can be used for fault verification and isolation after

automatic detection of a fault or receipt of some other error report.

Loopback messages can also used to confirm the successful restoration

or initiation of connectivity. The receiving maintenance point should

respond to the loop back message with a loopback reply.

The point from which the loopback message is transmitted (i.e., a local

DSAP) and the target maintenance point must be within the same MA.

If the continuity check database does not have an entry for the

specified maintenance point, an error message will be displayed.

When using the command line or web interface, the source MEP used

by to send a loopback message is chosen by the CFM protocol.

However, when using SNMP, the source MEP can be specified by the

MD Index – Domain index. (Range: 1-65535)

MA Index – MA identifier. (Range: 0-4094)

| Basic Administration Protocols

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