CLI Reference Guide-R04

Chapter 27 | CFM Commands
Link Trace Operations
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Command Mode
Global Configuration
Command Usage
◆ A link trace message is a multicast CFM frame initiated by a MEP, and forwarded
from MIP to MIP, with each MIP generating a link trace reply, up to the point at
which the link trace message reaches its destination or can no longer be
forwarded.
◆ Use this command to enable the link trace cache to store the results of link
trace operations initiated on this device. Use the ethernet cfm linktrace
command to transmit a link trace message.
◆ Link trace responses are returned from each MIP along the path and from the
target MEP. Information stored in the cache includes the maintenance domain
name, MA name, MEPID, sequence number, and TTL value.
Example
This example enables link trace caching.
Console(config)#ethernet cfm linktrace cache
Console(config)#
ethernet cfm linktrace
cache hold-time
This command sets the hold time for CFM link trace cache entries. Use the no form
to restore the default setting.
Syntax
ethernet cfm linktrace cache hold-time minutes
no ethernet cfm linktrace cache hold-time
minutes – The aging time for entries stored in the link trace cache.
(Range: 1-65535 minutes)
Default Setting
100 minutes
Command Mode
Global Configuration
Command Usage
Before setting the aging time for cache entries, the cache must first be enabled
with the ethernet cfm linktrace cache command.