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.
detect Error disable detection
recovery Error disable recovery
D-C3550-2A(config)#errdisable recovery ?
cause Enable error disable recovery for application
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.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.