Configuration Guide User guide
FastIron Configuration Guide 605
53-1002494-02
Link Fault Signaling for 10Gbps Ethernet devices
Enabling Link Fault Signaling
To enable Link Fault Signaling (LFS) between two 10 Gbps Ethernet devices, enter commands such
as the following on both ends of the link.
Brocade(config)#interface e 1/1
Brocade(config-if-e1000-1/1)#link-fault-signal
Syntax: [no] link-fault-signal
Use the no form of the command to disable LFS.
LFS is OFF by default.
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.
The bold text in the above output shows that the LFS-enabled link (port 10/1) is down because of
an error on the remote port, as indicated by remote fault.
Syntax: show interface ethernet <port>
Specify the port variable in one of the following formats:
• FSX, FSX 800, and FSX 1600 chassis devices – slotnum/portnum
• FESX compact switches – portnum
.
The bold text in the above output indicates that there is an error on the LFS-enabled link on port
10/1 and the link is down.
Syntax: show interfaces brief
Brocade#show interface e 10/1
10GigabitEthernet10/1 is down (remote fault), line protocol is down
Hardware is 10GigabitEthernet, address is 0012.f227.79d8 (bia 0012.f227.79d8)
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
some lines omitted for brevity...
Brocade#show interfaces brief
Port Link State Dupl Speed Trunk Tag Pvid Pri MAC Name
10/1 Err-LFS None None None None No 1 0 0012.f227.79d8