Users Guide

• 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. (Optional) Congure 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: species 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.
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. Specify the time (in seconds) to wait for the upstream port channel (LAG 128) to come back up before server ports are brought
down.
UPLINK-STATE-GROUP mode
defer-timer seconds
NOTE: This command is available in Standalone and VLT modes only.
The range is from 1 to 120.
6. (Optional) Enter a text description of the uplink-state group.
UPLINK-STATE-GROUP mode
description text
The maximum length is 80 alphanumeric characters.
7. (Optional) Disable 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 (in PMUX mode)
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
trac.
EXEC mode
Uplink Failure Detection (UFD)
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