3Com 4210G Series, Configuration Manual, Page: 798 / 1133

6-9
Configuration Prerequisites
Before configuring this function, you should first complete the MEP and MIP configuration tasks.
Configuration Procedure
Follow these steps to configure LB on MEP:
To do... Use the command... Remarks
Enter system view
system-view
—
Enable LB
cfd loopback service-instance instance-id mep
mep-id
{
target-mep target-mep-id
|
target-mac
mac-address
} [
number loopback-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