To configure the link OAM, perform the following steps.
-
Execute the
link-oam command to enter the link OAM global configuration mode.
device# configure terminal
device(config)# protocol link-oam
device(config-link-oam)#
-
(Optional) Execute the
shutdown command to disable the link OAM protocol. The
no form of the command enables the protocol.
device(config-link-oam)# shutdown
By default, link OAM protocol is enabled when protocol link-oam is configured .
-
Configure the timeout value using the
timeout command. This value corresponds to the hold time before restarting the discovery process. By default, the timeout value is 5 seconds.
device(config-link-oam)# timeout 4
-
Configure the PDU rate using the
pdu-rate
command. This value corresponds to the number of OAMPDUs per second. By default, the PDU rate is 1 per second.
device(config-link-oam)# pdu-rate 10
Note
It is recommended to configure timeout interval at least three times the PDU interval, to avoid link OAM protocol flaps against loss of one or two PDUs for any latency issues in general and during HA Failover.
-
From the Ethernet interface configuration mode, enable the link OAM on the interface using the link-oam enable command. By default, link OAM is disabled on the interface.
device(config)# interface ethernet 1/1
device(config-int-eth1/1)# link-oam enable passive
Note
The mode can be active or passive. The
no form of the command allows you to remove the current configuration, after which you can reconfigure.
-
Enable the remote loopback functionality in the interface using the
link-oam allow-loopback
command. By default, loopback is disabled on the interface. The
no form of the command disables the functionality on the interface.
device(config-int-eth1/1)#link-oam allow-loopback
-
(Optional) Block the interface on receiving the remote failure message using the link-oam remote-failure command. By default, on receiving a remote failure message, the device only logs the event through syslog.
device(config-int-eth1/1)# link-oam remote-failure link-fault action block-interface
device(config-int-eth1/1)# link-oam remote-failure dying-gasp action block-interface
device(config-int-eth1/1)# link-oam remote-failure critical-event action block-interface
Note
The command configures the block-interface action for each of the three events that the protocol supports.
-
(Optional) Verify the link OAM configuration using the
show link-oam info
command.
device# show link-oam info
Ethernet Link Status OAM Status Mode Local Stable Remote Stable
1/1 up up active satisfied satisfied
1/2 up up passive satisfied satisfied
1/3 up up active satisfied satisfied
1/4 up init passive unsatisfied unsatisfied
1/5 down down passive unsatisfied unsatisfied
1/6 down down passive unsatisfied unsatisfied
1/7 down down passive unsatisfied unsatisfied
-
(Optional) View the link OAM statistics using the
show link-oam statistics command.
device# show link-oam statistics
Ethernet Tx PDUs Rx PDUs
2/1 93 92
2/2 45 46
-
(Optional) From the Exec mode, enable the remote loopback on peer that is connected to local ethernet interface specified, using the
link-oam remote-loop-back command.
device# link-oam remote-loop-back ethernet 1/1 start
device# link-oam remote-loop-back ethernet 1/1 stop
-
(Optional) Clear the OAM statistics using the
clear link-oam statistics command.
device# clear link-oam statistics
