Dell S4820T User Manual

6. (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
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:
– Fast Ethernet: enter fastethernet {slot/port | slot/port-range}
– For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port
information.
– For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.
– For a port channel interface, enter 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:
tengigabitethernet 1/1-2,5,9,11-12
port-channel 1-3,5
* A comma is required to separate each port and port-range entry.
clear ufd-disable {interface interface | uplink-state-group group-id}: re-
enables all UFD-disabled downstream interfaces in the group. The range is from 1 to 16.
Example of Syslog Messages Before and After Entering the clear ufd-disable uplink-state-
group
Command (S50)
The following example message shows the Syslog messages that display when you clear the UFD-
Disabled state from all disabled downstream interfaces in an uplink-state group by using the clear
ufd-disable uplink-state-group
group-id command. All downstream interfaces return to an
operationally up state.
02:36:43: %RPM0-P:CP %IFMGR-5-ASTATE_DN: Changed interface Admin state to
down: Te 1/6
02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te
1/6
02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Downstream interface set to UFD
error-disabled: Fo 3/48
02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Downstream interface set to UFD
1020
Uplink Failure Detection (UFD)

Dell S4820T Specifications

General

Brand	Dell
Model	S4820T
Category	Switch
Language	English