Reference Guide

fefd
Enable Far-End Failure Detection on an interface, set the FEFD interval, or select the FEFD mode.
S4820T
Syntax
fefd {disable|interval|mode {aggressive|normal}
Parameters
disable Enter the keyword disable to disable FEFD for the specified interface.
interval Enter the keyword interval, followed by a value to specify the FEFD
interval in seconds. Range is from 3 to 300. Default is 15.
mode Enter the keyword mode followed by the mode type to specify the
FEFD mode.
• normal: 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 an “unknown” state, the software
brings down the line protocol.
• aggressive: 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 an “error-disabled” state, you
must enter the fefd reset command to reset the
interface state. Range is normal or aggressive. Default is
normal.
Defaults Disabled.
Command Modes INTERFACE
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.12.0 Introduced on the S4810.
Legacy E-Series
command.
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 reset
command.
Related
Commands
• fefd disable — disables far-end failure detection on an interface.
• fefd reset — enables FEFD globally on the system.
• fefd mode — changes FEFD mode on an interface.
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