Reference Guide

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 Description
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
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.
Z9500
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.
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 Description
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T
8.3.12.0 Introduced on the S4810.
8.4.2.3 Introduced on the S-Series S50.
Related
Commands
● uplink-state-group — creates an uplink-state group and enables the tracking of upstream links.
1372 Uplink Failure Detection (UFD)