Port lights flickering

[kwandilematshoba]

I went to a few server rooms in the last few day because end users lost connection to the network. Cisco Catalyst 2960, 4506-E, 4507R+E, the port light were green but flickering. The status light on the sup card was red on the 4507R+E. Could that mean there is a fault with one of the  ports or it is just the light bulb that has a problem. Is there a way to troubleshoot such issue.

[balaji.bandi · Accepted solution]

Green light is normal, when the traffic going in and out of the port you see this.

you can also see any errors on the port :

show interface gig x/x

show logging show you any issue on the switch.

show module show you any issue with module and what module have good.

is thus a dual supervisor... ?

[kwandilematshoba]

Yes it is a dual supervisor on a core switch

[Reza Sharifi]

Can you post the output of "sh module" from the 4507?

HTH