cisco switch problem

[mrzh009811]

hi everybody,

i have a problem with cisco 2960 switch,

all ports of this switch continuously getting up and down, up and down, include uplinks port

you can view video of this problem at attachment.

what is the problem ? 

[marce1000]

 - Connect to your switch and issue show logging ; watch out for errors and or other problematic info.

M.

[Deepak Kumar]

Hi,

can you put show interface of one of the flapping ports?

Can you try to move one of the flapping devices to another switch to see if it will continue to flap, this is the fastest way to check who is going crazy.

If there is nothing in common with the flapping ports/devices then it has to be switch misbehaving and you must check cablings, patch panel, devices, switch CPU, memory etc.

Regards,

Deepak Kumar

[AymanMunassar]

Try the show interface module/number 

Look at the counters if some of them have been raising, where they should not.

[Paul Webster]

Check port by port. drop packets, interfaces reset, runts, collitions etc, isolate the ports....

shut down all the ports and then turn on one by one until the problem starts again.

[Leo Laohoo]

Post the complete output to the command "sh version".