H3C Technologies H3C S3100 Series Switches - Manual (Page 1052)

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# On Device B, enable the sending of CCMs for MEP 2001 in service instance 2 on Ethernet 1/0/3.
[DeviceB] interface ethernet 1/0/3
[DeviceB-Ethernet1/0/3] cfd cc service-instance 2 mep 2001 enable
[DeviceB-Ethernet1/0/3] quit
# On Device D, enable the sending of CCMs for MEP 4001 in service instance 2 on Ethernet 1/0/1, and
enable the sending of CCMs for MEP 4002 in service instance 1 on Ethernet 1/0/3.
[DeviceD] interface ethernet 1/0/1
[DeviceD-Ethernet1/0/1] cfd cc service-instance 2 mep 4001 enable
[DeviceD-Ethernet1/0/1] quit
[DeviceD] interface ethernet 1/0/3
[DeviceD-Ethernet1/0/3] cfd cc service-instance 1 mep 4002 enable
[DeviceD-Ethernet1/0/3] quit
# On Device E, enable the sending of CCMs for MEP 5001 in service instance 1 on Ethernet 1/0/4.
[DeviceE] interface ethernet 1/0/4
[DeviceE-Ethernet1/0/4] cfd cc service-instance 1 mep 5001 enable
[DeviceE-Ethernet1/0/4] quit
7) Verify the configurations
When the CC function detects a link fault, you can use the LB function to locate the fault. For example:
# Enable LB on Device A to check the status of the link between MEP 1001 and MEP 5001 in service
instance 1.
[DeviceA] cfd loopback service-instance 1 mep 1001 target-mep 5001
Loopback to 0010-FC00-6512 with the sequence number start from 1001-43404:
Reply from 0010-FC00-6512: sequence number=1001-43404
Reply from 0010-FC00-6512: sequence number=1001-43405
Reply from 0010-FC00-6512: sequence number=1001-43406
Reply from 0010-FC00-6512: sequence number=1001-43407
Reply from 0010-FC00-6512: sequence number=1001-43408
Send:5 Received:5 Lost:0
After the whole network status is obtained with the CC function, you can use the LT function to identify
the paths between source and destination MEPs or locate faults. For example:
# Identify the path between MEP 1001 and MEP 5001 in service instance 1 on Device A.
[DeviceA] cfd linktrace service-instance 1 mep 1001 target-mep 5001
Linktrace to MEP 5001 with the sequence number 1001-43462
MAC Address TTL Last MAC Relay Action
0010-FC00-6512 63 0010-FC00-6511 Hit
0010-FC00-6511 62 0010-FC00-6510 FDB