Reference Guide

Where port-range and port-channel-range specify a range of ports separated by a dash (-) and/or
individual ports/port channels in any order; for example:
upstream gigabitethernet 1/1-2,5,9,11-12
downstream port-channel 1-3,5
– A comma is required to separate each port and port-range entry.
To delete an interface from the group, use the no {upstream | downstream} interface command.
3. Configure the number of downstream links in the uplink-state group that will be disabled (Oper Down state) if one
upstream link in the group goes down.
UPLINK-STATE-GROUP mode
downstream disable links {number | all}
– number: specifies the number of downstream links to be brought down. The range is from 1 to 1024.
– all: brings down all downstream links in the group.
The default is no downstream links are disabled when an upstream link goes down.
NOTE: Downstream interfaces in an uplink-state group are put into a Link-Down state with an UFD-Disabled
error message only when all upstream interfaces in the group go down.
To revert to the default setting, use the no downstream disable links command.
4. (Optional) Enable auto-recovery so that UFD-disabled downstream ports in the uplink-state group come up when a
disabled upstream port in the group comes back up.
UPLINK-STATE-GROUP mode
downstream auto-recover
The default is auto-recovery of UFD-disabled downstream ports is enabled.
To disable auto-recovery, use the no downstream auto-recover command.
5. (Optional) Enters a text description of the uplink-state group.
UPLINK-STATE-GROUP mode
description text
The maximum length is 80 alphanumeric characters.
6. (Optional) Disables upstream-link tracking without deleting the uplink-state group.
UPLINK-STATE-GROUP mode
no enable
The default is upstream-link tracking is automatically enabled in an uplink-state group.
To re-enable upstream-link tracking, use the enable command.
Clearing a UFD-Disabled Interface
You can manually bring up a downstream interface in an uplink-state group that UFD disabled and is in a UFD-Disabled
Error state.
To re-enable one or more disabled downstream interfaces and clear the UFD-Disabled Error state, use the following
command.
• Re-enable a downstream interface on the switch/router that is in a UFD-Disabled Error State so that it can send and
receive traffic.
EXEC mode
clear ufd-disable {interface interface | uplink-state-group group-id}
For interface, enter one of the following interface types:
825