Parameters
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.
Command Modes EXEC Privilege
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.12.0 Introduced on the S4810.
Legacy E-Series 
command.
Related 
Commands
• fefd – enables far-end failure detection on an interface.
• fefd reset – enables FEFD globally on the system.
fefd
Enable far-end failure detection on an interface.
E-Series, Z-Series, S4810
Syntax
fefd
To disable FEFD on an interface, use the no fefd command.
Defaults Disabled.
Command Modes INTERFACE
Command History
Version 8.3.11.1 Introduced on the Z9000.
950