Connectivity Guide

Version Description
9.8(2.0) Introduced on the S3100 series.
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.
Legacy E-Series
command.
Usage
Information
The following describes the show fefd command shown in the following example.
Field Description
Interface Displays the interfaces type and number.
Mode Displays the mode (aggressive or normal) or NA if the interface contains fefd
reset in its configuration.
Interval Displays the interval between FEFD packets.
State Displays the state of the interface and can be one of the following:
● bi-directional (interface is up, connected and hearing neighbor’s echoes).
● err-disabled (only found when FEFD mode is aggressive and when the interface
has not hearing its neighbor’s echoes for three times the message interval. To
reset an interface in this state, use the fefd reset command.)
● unknown (only found when FEFD mode is normal.
● locally disabled (interface contains the fefd reset command in its
configuration).
● Admin Shutdown (interface is disabled with the shutdown command).
Example
DellEMC# show fefd
FEFD is globally 'ON', interval is 10 seconds, mode is 'Aggressive'.
INTERFACE MODE INTERVAL STATE
(second)
Tf 1/1 Aggressive 10 Admin Shutdown
Tf 1/2 Aggressive 10 Admin Shutdown
Tf 1/3 Aggressive 10 Admin Shutdown
Tf 1/4 Aggressive 10 Admin Shutdown
Tf 1/5 Aggressive 10 Admin Shutdown
Tf 1/6 Aggressive 10 Admin Shutdown
Tf 1/7 Aggressive 10 Admin Shutdown
Tf 1/8 Aggressive 10 Admin Shutdown
Tf 1/9 Aggressive 10 Admin Shutdown
Tf 1/10 NA NA Locally disabled
Tf 1/11 Aggressive 10 Err-disabled
DellEMC#
Related
Commands
● fefd — enable far-end failure detection.
● fefd disable — disable FEFD on an interface only.
● fefd-global — enable FEFD globally on the system.
● fefd reset — reset all interfaces or a single interface that was in “error-disabled” mode.
934 Layer 2