H3C S5120-EI Series - Page 40

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Send:5 Received:5 Lost:0
After the whole network status is obtained with the CC function, use the LT function to identify the
paths between source and target MEPs and to locate faults.
2. Verify the LT function:
# 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-FC00-6515 63 0010-FC00-6512 Hit
3. Verify the LM function:
After the CC function obtains the status information of the entire network, use the LM function to test
the link status. For example:
# Test the frame loss from MEP 1001 to MEP 4002 in service instance 1 on Device A.
[DeviceA] cfd slm service-instance 1 mep 1001 target-mep 4002
Reply from 0010-FC00-6514
Far-end frame loss: 10 Near-end frame loss: 20
Reply from 0010-FC00-6514
Far-end frame loss: 40 Near-end frame loss: 40
Reply from 0010-FC00-6514
Far-end frame loss: 0 Near-end frame loss: 10
Reply from 0010-FC00-6514
Far-end frame loss: 30 Near-end frame loss: 30
Average
Far-end frame loss: 20 Near-end frame loss: 25
Far-end frame loss rate: 25% Near-end frame loss rate: 32%
Send LMMs: 5 Received: 5 Lost: 0
4. Verify the one-way DM function:
After the CC function obtains the status information of the entire network, use the one-way DM
function to test the one-way frame delay of a link. For example:
# Test the one-way frame delay from MEP 1001 to MEP 4002 in service instance 1 on Device A.
[DeviceA] cfd dm one-way service-instance 1 mep 1001 target-mep 4002
Info: 5 1DM frames process is done, please check the result on the remote device.
# Display the one-way DM result on MEP 4002 in service instance 1 on Device D.
[DeviceD] display cfd dm one-way history service-instance 1 mep 4002
Service instance: 1
MEP ID: 4002
Send 1DM total number: 0
Received 1DM total number: 5
Frame delay: 10ms 9ms 11ms 5ms 5ms
Delay average: 8ms
Delay variation: 5ms 4ms 6ms 0ms 0ms
Variation average: 3ms
5. Verify the two-way DM function:
After the CC function obtains the status information of the entire network, use the two-way DM
function to test the two-way frame delay of a link. For example: