Error disabled ports

[t.dhaliwal]

I have a 3550 switch that gets a error-disabled copper ports. There is no errors ont the port. What else would cause it to be disabled?

[szahid]

Although there is no error on the port , there should be an error message in the log that should tell you the reason why the port got error disabled like port security violation , loopback detection , etherchannel misconfig etc.

You can enable errordisable recovery for all different causes by setting a timer. What happens is once this timer expires , the port is brough out of error dsiabled state.

Here are some of the useful commands.

D-C3550-2A(config)#errdisable ?

detect Error disable detection

recovery Error disable recovery

D-C3550-2A(config)#errdisable recovery ?

cause Enable error disable recovery for application

interval Error disable recovery timer value

Hope this helps.

Salman Z.

[amikat]

Hi,

You can issue the command "show interfaces status err-disabled" and see the reason under "Reason" heading. There are quite a few resons for a port to get into this status and these vary slightly according to IOS version.

Best regards,

Antonin