DELL S50V User Manual

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Uplink Failure Detection (UFD)

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You can manually bring up a downstream interface in an uplink-state group that has been disabled by UFD 
and is in a UFD-disabled error state. To re-enable one or more disabled downstream interfaces and clear 
the UFD-disabled error state, enter the following command: 

5

Command Mode: 
UPLINK-STATE-GROUP

(Optional) Enters a text description of the uplink-state group. 
Maximum length: 80 alphanumeric characters.

6

Command Mode: 
UPLINK-STATE-GROUP

(Optional) Disables upstream-link tracking without deleting the 
uplink-state group.

Default: Upstream-link tracking is automatically enabled in an 
uplink-state group. 

To re-enable upstream-link tracking, enter the enable command.

interface interface | 

uplink-state-group group-id 

Command Mode: CONFIGURATION 

Re-enables a downstream interface on the switch/router that is in a 
UFD-disabled error state so that it can send and receive traffic. 

For interface, enter one of the following interface types: 
Fast Ethernet: fastethernet {slot/port | slot/port-range}
1-Gigabit Ethernet: gigabitethernet {slot/port |slot/port-range}
10-Gigabit Ethernet: 
tengigabitethernet {slot/port |slot/port-range}
Port channel: port-channel {1-512 | port-channel-range}

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: 

gigabitethernet 1/1-2,5,9,11-12

port-channel 1-3,5

A comma is required to separate each port and port-range entry.
uplink-state-group group-id re-enables all UFD-disabled 
downstream interfaces in the group. Valid values are 1 to 16.