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Ports went into errordisable state

Feb 15 19:44:24.602 IST: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet0/1.

Feb 15 19:44:24.602 IST: %PM-4-ERR_DISABLE: loopback error detected on Gi0/1, putting Gi0/1 in err-disable state

3 Replies 3

azibnaseem
Level 1
Level 1

Hey netplace  '

Please share the output of Command, show interfaces status err-disabled.

Regards'

Feb 15 19:44:24.602 IST: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet0/1.

got only this log msg from SW. we did shut no shut on trunk interface

  - It means you had a loop; these are very dangerous and can lead to a network meltdown; check your network topology and spanning-tree.

M.



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