3Com S7902E, Configuration Manual

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To do... Use the command... Remarks
Enable LB
cfd loopback
service-instance instance-id
mep mep-id
{ target-mep
target-mep-id | target-mac
mac-address } [ number
number ]
Required
Disabled by default
Configuring LT on MEPs
LT can trace the path between the specified MEP and the target MEP, and can also locate link faults by
sending LT messages automatically. The two functions are implemented in the following way:
z
To implement the first function, the specified MEP first sends LTM messages to the target MEP.
Based on the LTR messages in response to the LTM messages, the path between the two MEPs
can be identified.
z
In the latter case, after LT messages automatic sending is enabled, if a MEP fails to receive the
CCMs from the remote MEP within 3.5 sending intervals, the link between the two is regarded as
faulty and LTMs will be sent out. Based on the LTRs that echo back, the fault source can be
located.
Configuration Prerequisites
Before configuring this function, you should first complete MEP and MIP configuration tasks.
Finding the Path Between a Source MEP and a Target MEP
Follow these steps to find the path between a source MEP and a target MEP:
To do... Use the command... Remarks
Enter system view system-view
—
Find the path between a source
MEP and a target MEP
cfd linktrace
service-instance instance-id
mep mep-id
{ target-mep
target-mep-id | target-mac
mac-address } [ ttl ttl-value ]
[ hw-only ]
Required
Enabling Automatic LT Messages Sending
Follow these steps to enable automatic LT messages sending:
To do... Use the command... Remarks
Enter system view system-view
—
Enable automatic LT messages
sending cfd linktrace auto-detection
[ size size-value ]
Required
Disabled by default