Re-enabling an error-disabled port automatically

Enable a port to automatically recover from the error-disabled state after the expiration of an error recovery timer.

1. Enter global configuration mode.
   

   device# configure terminal
   

2. Enter STP configuration mode.
   

   device(config)# protocol spanning-tree stp
   

3. Enable the error-disable-timeout timer.
   

   device(config-stp)# error-disable-timeout enable
   

4. Set an interval after which port shall be enabled.
   

   device(config-stp)# error-disable-timeout interval 60
   

   The interval range is from 0 to 1000000 seconds, the default is 300 seconds.
5. Return to privileged EXEC mode.
   

   device(config-stp)# end
   

6. Verify the configuration.
   

   device# show spanning-tree
    Spanning-tree Mode: Spanning Tree Protocol
   
    Root Id: 8000.768e.f805.5800 (self)
    Bridge Id: 8000.768e.f805.5800
   
    Root Bridge Forward Delay: 15; Hello Time: 2; Max Age: 20; Max-hops: 20
    Configured Forward Delay: 15; Hello Time: 2; Max Age: 20; Max-hops: 20
    Number of topology change(s): 0
   
    Bpdu-guard errdisable timeout: enabled
    Bpdu-guard errdisable timeout interval: 60 sec
   

Automatically re-enable an error-disabled port configuration example

device# configure terminal
device(config)# protocol spanning-tree stp
device(config-stp)# error-disable-timeout enable
device(config-stp)# error-disable-timeout interval 60
device(config-stp)# end
device# show spanning-tree