Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 606)

550 Brocade 6910 Ethernet Access Switch Configuration Guide
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CFM Commands
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] [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,
maximum length is 44 minus the length of the domain name)
transmit-count – The number of times the loopback message is sent. (Range: 1-1024)
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.