Reference Guide

480 | Far-End Failure Detection (FEFD)
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Command Modes
EXEC Privilege
fefd
e
Enable Far-End Failure Detection on an interface.
Syntax
fefd
To disable FEFD on an interface, enter no fefd.
Defaults
Disabled.
Command Modes
INTERFACE
Usage
Information
When you enter no fefd for an interface and fefd-global, FEFD is enabled on the interface because
the no fefd command is not retained in the configuration file. To keep the interface FEFD disabled
when the global configuration changes, use the fefd disable command.
fefd mode
e
Change the FEFD mode on an interface.
Syntax
fefd mode {normal | aggressive}]
To return the FEFD mode to the default of normal, enter no fefd mode.
Parameters
Defaults normal
Command Modes
INTERFACE
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.
normal (OPTIONAL) Enter the keyword normal to change the link state to “unknown”
when a far-end failure is detected by the software on that interface. When the
interface is placed in “unknown” state, the software brings down the line
protocol.
aggressive (OPTIONAL) Enter the keyword aggressive to change the link state to
“error-disabled” when a far-end failure is detected by the software on that
interface. When an interface is placed in “error-disabled” state, you must enter the
fefd reset command to reset the interface state.