Command Line Reference Guide

24
Uplink Failure Detection (UFD)
Uplink failure detection (UFD) provides detection of the loss of upstream connectivity and, if you use this
with network interface controller (NIC) teaming, automatic recovery from a failed link.
NOTE: In Standalone, VLT, and Stacking modes, the UFD group number is 1 by default and cannot
be changed.
defer-timer
Configure a timer that prevents unwanted flapping of downstream ports when the uplink port channel
goes down and comes up.
Syntax
defer-timerseconds
Defaults 10 (Standalone mode)
Parameters
seconds Specify the time (in seconds) to wait for the upstream port
channel (LAG 128) to come back up before server ports are
brought down. The range is from 1 to 120.
Command
Modes
UPLINK-STATE-GROUP
Command
History
Version 9.2(0.0) Introduced on the M I/O Aggregator.
Usage
Information
This command is not supported in programmable-mux mode.
enable
Re-enable upstream-link tracking for an uplink-state group after it has been disabled.
Syntax
enable
To disable upstream-link tracking without deleting the uplink-state group, use the
no enable command.
group-id Enables debugging on the specified uplink-state group. Valid group-id values are 1
to 16.
Uplink Failure Detection (UFD)
279