The network was working good with 2 3560G switches working as core
switch.We had a power failure and since then the network is only
stable if 1 core switch is running. if we turn on the 2nd everything
goes down after 5 minutes. it might come back after some 5 minutes
and goes down again. If i switch of the 2nd core switch all goes
back to normal. configuration seems normal. we have not changed
anything. I wonder if the 2nd core switch has hardware damage.
any one as any clues?