Reference Guide
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Legacy E-Series 
command.
Related 
Commands
• fefd — enables far-end failure detection.
fefd mode
Change the FEFD mode on an interface.
S4820T
Syntax
fefd mode {normal | aggressive}]
To return the FEFD mode to the default of normal, use the no fefd mode command.
Parameters
normal (OPTIONAL) Enter the keyword normal to change the link state to 
“unknown” when a far-end failure the software detects 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 the software detects 
on that interface. When an interface is placed in “error-disabled” 
state, enter the fefd reset command to reset the interface state.
Defaults normal
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 8.3.7.0 Introduced on the S4810.
Legacy E-Series 
command.
Related 
Commands
• fefd — enables far-end failure detection.
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