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.
fefd-global
Enable FEFD globally on the system.
E-Series, Z-Series, S4810
Syntax
fefd-global [mode {normal | aggressive}]
To disable FEFD globally, use the no fefd-global [mode {normal | 
aggressive}] command.
Parameters
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. The 
default is 
Normal mode.
aggressive (OPTIONAL) Enter the keywords mode 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.
Defaults Disabled.
Command Modes CONFIGURATION
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.12.0 Introduced on the S4810.
Legacy E-Series 
command.
951