Reference Guide

Layer 2 | 765
Far-End Failure Detection (FEFD)
FTOS supports Far-End Failure Detection (FEFD) on the Ethernet interfaces of the following
platforms as indicated by the characters that appear under each of the command headings:
E-Series
e, S4810 , Z-Series z
The FEFD feature detects and reports far-end link failures.
• FEFD is not supported on the Management interface.
• During an RPM failover, FEFD is operationally disabled for approximately 8-10 seconds.
• By default, FEFD is disabled.
Commands
The FEFD commands are:
• debug fefd
• fefd
• show fefd
debug fefd
e Z
Enable debugging of FEFD.
Syntax
debug fefd {events | packets} [interface]
To disable debugging of FEFD, use the no debug fefd {events | packets} [interface]
command.
Parameters
Command Modes
EXEC Privilege
events Enter the keyword events to enable debugging of FEFD state changes.
packets Enter the keyword packets to enable debugging of FEFD to view information on packets
sent and received.
interface
(OPTIONAL) Enter the following keywords and slot/port or number information:
• For a 1-Gigabit Ethernet interface, enter the keyword
GigabitEthernet followed by
the slot/port information.
• For a SONET interface, enter the keyword
sonet followed by the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet
followed by the slot/port information.
• For a 1-Gigabit Ethernet interface, enter the keyword
GigabitEthernet followed by
the slot/port information.
• For a 40-Gigabit Ethernet interface, enter the keyword
fortyGigE followed by the slot/
port information.