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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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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:
  • For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet then the slot/port information.
  • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet 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:
      gigabitethernet gigabitethernet 1/1-1/2,1/5,1/9,1/11-1/12
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: Gi 1/6
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Gi 1/6
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Downstream interface set to UFD error-disabled: Te 3/49
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Downstream interface set to UFD error-disabled: Te 3/50
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Downstream interface set to UFD error-disabled: Te 3/51
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 3/49
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 3/50
  02:36:43: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 3/51
  
  02:37:29: %RPM0-P:CP %IFMGR-5-ASTATE_DN: Changed interface Admin state to down: Gi 1/7
  02:37:29: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Gi 1/7
  02:37:29 : UFD: Group:3, UplinkState: DOWN

  02:37:29: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed uplink state group state to down: Group 3
  02:37:29: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Downstream interface set to UFD error-disabled: Te 3/52
  02:37:29: %RPM0-P:CP %IFMGR-5-OSTATE_DN: Changed interface state to down: Te 3/52

  02:38:31 : UFD: Group:3, UplinkState: UP
  02:38:31: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed uplink state group state to up: Group 3
  
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Downstream interface cleared from UFD error-disabled: Te 3/49
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Downstream interface cleared from UFD error-disabled: Te 3/50
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Downstream interface cleared from UFD error-disabled: Te 3/51
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Downstream interface cleared from UFD error-disabled: Fo 3/52
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed interface state to up: Te 3/49
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed interface state to up: Te 3/50
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed interface state to up: Te 3/51
  02:38:53: %RPM0-P:CP %IFMGR-5-OSTATE_UP: Changed interface state to up: Te 3/52

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