Which two port err-disabled recovery options are used to detect the reason? (Choose two.) – CONCEPT ONLY
A. show errdisable detect
B. show errdisable recovery
C. error-disable notifications/traps are active by default.
D. error-disable notifications/traps are disabled by default.
E. error-disable notifications/traps is never possible.
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/69980-errdisable-recovery.html#anc7
Troubleshoot
show interfaces status err-disabled—Shows which local ports are involved in the errdisabled state.
show errdisable recovery—Shows the time period after which the interfaces are enabled for errdisable conditions.
show errdisable detect—Shows the reason for the errdisable status.