Chapter 13
| Basic Administration Protocols
Connectivity Fault Management
– 510 –
Figure 316: Transmitting Link Trace Messages
Transmitting Loop
Back Messages
Use the Administration > CFM (Transmit Loopback) page to transmit Loopback
Messages (LBMs). These messages can be used to isolate or verify connectivity
faults by submitting a request to a target node (i.e., a remote MEP or MIP) to echo
the message back to the source.
Command Usage
â—† Loopback 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.
â—† The point from which the loopback message is transmitted (i.e., a local DSAP)
and the target maintenance point must be within the same MA.
â—† If the continuity check database does not have an entry for the specified
maintenance point, an error message will be displayed.
â—† 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.
Parameters
These parameters are displayed:
◆ MD Index – Domain index. (Range: 1-65535)
◆ MA Index – MA identifier. (Range: 1-2147483647)
◆ Source MEP ID – The identifier of a source MEP that will send the loopback
message. (Range: 1-8191)
To Next Page
Loading...
Need help?
General