we have a problem with two catalyst switches WS-C3560G-48PS. They were working for one year with no problem but from last week they are "freezing" ... no ping, all communication is stopped.
In this state all port that were communicating, are solid green and no flashing is occured. Freezing in doing randomly, but mostly on morning every day. After restart they are working again. In this state are mostly two times per day.
They are not configured .... no routing, port configuration...only clean configuration file - default settings.
They are interconnected by optical connection.
Have someone idea where is the problem, or how to advance to solve the problem?