Problem with Cisco 2960 Series

[Manuel Nin]

Hi! Why when I run

no shutdown in a port, it says up, then it says down?

[Leo Laohoo]

Why do you need to "no shutdown" a port?

Could be alot of reason why the port goes down.  The most common is faulty cabling.

[George Stefanick]

What are you connecting the switch to or what is connecting to the switch on that port ?

[Vivek Ganapathi]

May be you need to check what's connected to the switch on that port. May be the port get's on err-disabled state. Post us the below output

sh run int

sh int

Thanks

Vivek

[ebarticel]

Your port is up, but line protocol goes down usually for clocking signal reasons, or port misconfigurations or other security features enabled on that port.

If you run "sh ip int brief" you will see that port status is up but protocol is down.

Hope this helps

Eugen