Administrator Guide
fefd
Enable Far-End Failure Detection on an interface, set the FEFD interval, or select the FEFD mode.
Syntax
fefd {disable|interval|mode {aggressive|normal}
Parameters
disable Enter the keyword disable to disable FEFD for the specied 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-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.12.0 Introduced on the S4810.
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 conguration le. To keep the interface FEFD disabled when the global
conguration changes, use the
fefd reset command.
Related Commands
• fefd disable — disable far-end failure detection on an interface.
• fefd reset — enable FEFD globally on the system.
• fefd mode — change FEFD mode on an interface.
942 Layer 2