Administrator Guide

Parameters
number Enter the number of downstream links to be brought down
by UFD. The range is from 1 to 1024.
all Brings down all downstream links in the group.
Defaults No downstream links are disabled when an upstream link in an uplink-state group
goes down.
Command
Modes
UPLINK-STATE-GROUP
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version 9.2(0.0) Introduced on the M I/O Aggregator. This command is
supported in Programmable-Mux (PMUX) mode only.
Version
8.3.19.0
Introduced on the S4820T.
Version
8.3.12.0
Introduced on the S4810.
Version 8.4.2.3 Introduced on the S-Series S50.
Usage
Information
A user-configurable number of downstream interfaces in an uplink-state group are
put into a link-down state with an UFD-Disabled error message when one
upstream interface in an uplink-state group goes down.
If all upstream interfaces in an uplink-state group go down, all downstream
interfaces in the same uplink-state group are put into a link-down state.
Related
Commands
• downstream — assigns a port or port-channel to the uplink-state group as a
downstream interface.
• uplink-state-group — creates an uplink-state group and enables the tracking of
upstream links.
enable
Enable uplink state group tracking for a specific UFD group.
Syntax
enable
To disable upstream-link tracking without deleting the uplink-state group, use the
no enable command.
Defaults Upstream-link tracking is automatically enabled in an uplink-state group.
454
PMUX Mode of the I/O Aggregator