Recently our ethernet network began experiencing a problem in which connection timeouts are occuring between the workstations and multiple servers. We are using mulitiple Win2k server and one Novell 3 server, all over which are losing connectivity. I had thought the the problem was narrowed down to a bad cisco switch, however after replacing the switch the problem still exists. I can ping each server and watch as it replys for about 5 minutes strait, then will begin timing out. It will timeout for anywhere from 5 to 60 seconds before "coming back". I have tried just about every network analyzer I can find and do not notice any strange activity . Any help, including anything suspicious to look for would be helpful.