To view disabled ports
SW#sh interfaces status err-disabled
Port Name Status Reason Err-disabled Vlans
Gi1/1/1 err-disabled gbic-invalid
Here the reason for port to go to err-disabled state is due to invalid GBIC (SFP) plugged on port Gi1/1/1
when port is in err-disabled state, you need to understand that
- no traffic flows on the port.
- port LED is orange color.
To recover from err-disabled port state
To recover a port from err-disabled state, manual intervention is required. You need to go to the interface mode, and issue shut and no shut command.
SW(config)# int Gi1/1/1
SW(config-if)# no shut