How to recover err-disable after an UDLD failure? (CONCEPT)
A. UDLD reset
B. Err-disable auto recovery
C. Shut and no shutdown (restart)
D. Reboot the switch
E. UDLD recovery
How to recover err-disable after an UDLD failure?
How to recover err-disable after an UDLD failure? (CONCEPT)
A. UDLD reset
B. Err-disable auto recovery
C. Shut and no shutdown (restart)
D. Reboot the switch
E. UDLD recovery
AC
based on https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_52_se/configuration/guide/3750scg/swudld.html#wp1020819
Actually A, B, C should be correct for that purpose.
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_52_se/configuration/guide/3750scg/swudld.html#wp1025440
Correct: BC
Reenable the Errdisabled Ports
After you fix the root problem, the ports are still disabled if you have not configured errdisable recovery on the switch. In this case, you must reenable the ports manually. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports