Administrator Guide

Usage Information
You can assign physical port or port-channel interfaces to an uplink-state group.
You can assign an interface to only one uplink-state group. Configure each interface assigned to an uplink-state
group as either an upstream or downstream interface, but not both.
You can assign individual member ports of a port channel to the group. An uplink-state group can contain either
the member ports of a port channel or the port channel itself, but not both.
Related
Commands
• upstream — assigns a port or port-channel to the uplink-state group as an upstream interface.
• uplink-state-group — creates an uplink-state group and enables the tracking of upstream links.
downstream auto-recover
Enable auto-recovery so that UFD-disabled downstream ports in an uplink-state group automatically come up when a disabled upstream
port in the group comes back up.
C9000 Series
Syntax
downstream auto-recover
To disable auto-recovery on downstream links, use the no downstream auto-recover command.
Defaults The auto-recovery of UFD-disabled downstream ports is enabled.
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
9.9(0.0) Introduced on the C9010.
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
• 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.
downstream disable links
Configure the number of downstream links in the uplink-state group that are disabled if one upstream link in an uplink-state group goes
down.
C9000 Series
Syntax
downstream disable links {number |all}
To revert to the default setting, use the no downstream disable links command.
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.
Uplink Failure Detection (UFD) 1661