HP 7500 Series High Availability Command Reference page 35

Parameters
service-instance instance-id: Specifies the service instance ID, ranging from 1 to 32767.
mep mep-id: Specifies the ID of the source MEP, ranging from 1 to 8191.
target-mep target-mep-id: Specifies the ID of the target MEP, ranging from 1 to 8191.
target-mac mac-address: Specifies the destination MAC address of the MP, in the format of H-H-H.
number number: Specifies the number of the LBMs packets sent, ranging from 1 to 10 and defaulting to
5.
Examples
# Enable LB to examine the status of the link between MEP 1 101 and MEP 2001 in service instance 1.
(Assume that the link status is normal.)
<Sysname> cfd loopback service-instance 1 mep 1101 target-mep 2001
Loopback to 0010-FC00-6512 with the sequence number start from 1101-43404:
Reply from 0010-FC00-6512: sequence number=1101-43404 time=5ms
Reply from 0010-FC00-6512: sequence number=1101-43405 time=5ms
Reply from 0010-FC00-6512: sequence number=1101-43406 time=5ms
Reply from 0010-FC00-6512: sequence number=1101-43407 time=5ms
Reply from 0010-FC00-6512: sequence number=1101-43408 time=5ms
Send:5
# Enable LB to examine the status of the link between MEP 1 101 and MEP 2001 in service instance 1.
(Assume that the link status is abnormal.)
<Sysname> cfd loopback service-instance 1 mep 1101 target-mep 2001
Sequence number=1101-43404: Request timed out
Sequence number=1101-43405: Request timed out
Sequence number=1101-43406: Request timed out
Sequence number=1101-43407: Request timed out
Sequence number=1101-43408: Request timed out
Send:5
Table 11 Command output
Field
Loopback to 0010-FC00-6512 with the
sequence number start from 1101-43404
sequence number
time=5ms
Request timed out
Send
Received
Lost
Received:5 Lost:0
Received:0 Lost:5
Description
Sends LBMs to 0010-FC00-6512 with the sequence number
starting with 1101-43404.
Sequence number in the LBR messages.
The interval between the sending of LBMs and receiving of LBRs is
5 milliseconds.
The request is timed out because no LBR is received within 5
milliseconds.
Number of LBMs sent.
Number of LBR messages received.
Number of lost LBRs.
29