CLI Reference Guide-R05

Chapter 24 | CFM Commands
Loopback Operations
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Loopback Operations
ethernet cfm
loopback
This command sends CFM loopback messages to a MAC address for a MEP or MIP.
Syntax
ethernet cfm loopback {dest-mep destination-mpid | src-mep source-mpid
{dest-mep destination-mpid | mac-address} | mac-address} md domain-name
ma ma-name [count transmit-count] [pattern padding-value]
[priority priority-value] [size packet-size]
destination-mpid – The identifier of a MEP that is the target of the loopback
message. (Range: 1-8191)
source-mpid – The identifier of a source MEP that will send the loopback
message. (Range: 1-8191)
mac-address – MAC address of the remote maintenance point that is the
target of the loopback message. This address can be entered in either of
the following formats: xx-xx-xx-xx-xx-xx or xxxxxxxxxxxx
domain-name – Domain name. (Range: 1-43 alphanumeric characters)
ma-name – Maintenance association name. (Range: 1-43 alphanumeric
characters)
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