Viewing the status of LFS-enabled links
The status of an LFS-enabled link is shown in the output of the show interface and show interface brief commands, as shown in the following examples.
device# show interface ethernet 1/1/10 10GigabitEthernet1/1/10 is down (remote fault), line protocol is down Hardware is 10GigabitEthernet, address is 0000.0027.79d8 (bia 0000.0027.79d8) Configured speed 10Gbit, actual unknown, configured duplex fdx, actual unknown Member of L2 VLAN ID 1, port is untagged, port state is BLOCKING BPDU guard is Disabled, ROOT protect is Disabled Link Fault Signaling is Enabled, Link Error Dampening is Disabled STP configured to ON, priority is level0 Flow Control is disabled mirror disabled, monitor disabled <Truncated for brevity...>
The above output shows that the LFS-enabled link (port 1/1/10) is down because of an error on the remote port.
device# show interfaces brief Port Link State Dupl Speed Trunk Tag Pvid Pri MAC Name 1/1/10 Err-LFS None None None None No 1 0 0000.0027.79d8
The above output indicates that there is an error on the LFS-enabled link on port 1/1/10 and the link is down.