[Solved] Catalyst C2960s reboot

[Xavier RICOL]

Hi,

We have a stack with 2 C2960S-48TS-L and 1 C2960S-24TS-L. Monday we upgraded the stack with the latest firmware 15.0(2)SE8-UNIVERSALK9.

Since then, 2 switches of the stack reboot twice or more by day. Without any action.

We upgraded another stack, with the same switches, and no reboot since the upgrade:

I find nothing in the events.

Could you please help us ?

Kind regards

Cedric

[Xavier RICOL]

It's hard to work with the log all the time, i tried to disable it with the command no logging console, but invalid input detected.

Is there another way to disable it just the moment i try to upload the 3 files ?

[Leo Laohoo]

config t

no logging console.

end

[Xavier RICOL]

Hello,

Thanx. The 3 files are attached in a zip.

[Leo Laohoo · Accepted solution]

The switch crashed to due excessive amount of MAC flapping.  This is generally caused when the ports are not configured for EtherChannel. 

If your company's most senior network engineer didn't work this out for himself, then you'd better get someone to manage the network properly.

[Xavier RICOL]

Thanx. I will see it when he will come back from holiday next monday.

[Xavier RICOL]

There were Ether Channel configurations before the upgrade, it disappeared. We put it again and no reboot.

Thanx again for your informations.