Command Line Reference Guide

462 | Far-End Failure Detection (FEFD)
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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
fefd-global
e
Enable FEFD globally on the system.
Syntax
fefd-global [mode {normal | aggressive}]
To disable FEFD globally, use the no fefd-global [mode {normal | aggressive}] command syntax.
Parameters
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.
mode normal (OPTIONAL) Enter the keywords mode 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.
Default: Normal mode