configure ports far-end-fault-indication

configure ports port_list far-end-fault-indication [on | off]


Enables/disables far-end-fault-indication (FEFI).

Syntax Description


Specifies one or more ports or slots and ports.


FEFI is disabled by default.

Usage Guidelines

Use this command to enable FEFI. When enabled, FEFI signals to the remote end on detecting single link (RX) failure/recovery.

The command is supported on non-combination SFP ports, that is, ports 1-12 on the Summit X480-24x, and all ports on the Summit X480-48x. If an attempt is made to use this command on combination ports, it is rejected.

Since the SFPs can be plugged and removed, a warning message is displayed in the syslog when a media type changes from FX/LX and FX to another media type. The warning message indicates that FEFI mode is enabled but is not useful for the new media type.

The current status is displayed in the show ports information detail command.


The following command enables FEFI on port 1:

configure ports 1 far-end-fault-indication on


This command was first available in ExtremeXOS 12.1.3.

Platform Availability

This command is available on the Summit X480-24x and X480-48x platforms.