ECS4100 Series CLI Reference Guide-R07

Chapter 29 | CFM Commands
Loopback Operations
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transmit-count – The number of times the loopback message is sent.
(Range: 1-1024)
padding-value – Padding characters used to fill the data TLV in a loopback
message. (Range: Any hexadecimal characters; Default: 0x0)
priority-value – Priority assigned to the loopback message (Range:0-7;
Default: 7)
packet-size – The size of the loopback message. (Range: 64-1518 bytes)
Default Setting
Loop back count: One loopback message is sent.
Loop back size: 64 bytes
Command Mode
Privileged Exec
Command Usage
◆ Use this command to test the connectivity between maintenance points. If the
continuity check database does not have an entry for the specified
maintenance point, an error message will be displayed.
◆ The point from which the loopback message is transmitted (i.e., the DSAP) and
the target maintenance point specified in this command must be within the
same MA.
◆ Loop back messages can be used for fault verification and isolation after
automatic detection of a fault or receipt of some other error report. Loopback
messages can also used to confirm the successful restoration or initiation of
connectivity. The receiving maintenance point should respond to the loop back
message with a loopback reply.
◆ When using the command line or web interface, the source MEP used by to
send a loopback message is chosen by the CFM protocol. However, when using
SNMP, the source MEP can be specified by the user.
Example
This example sends a loopback message to the specified remote MEP.
Console#ethernet cfm loopback dest-mep 2 md rd2 ma rd2
Type ESC to abort.
Source MA Name : rd2
Destination Address : 00-00-09-98-00-00
Transmitted LBM : 5
Received LBR In Time : 5
Console#