We recently replaced all of our switch infastructure. We had a mixture of Dell's, 3Com's, and Cisco's before. We have 2 3750g's for our core switches and 2960's for our edge switches. The whole network is gigabit now and our utilization is really low, it doesn't even show up on the traffic graphs. However at random times throughout the day we have clients in seperate building complaining that they are all losing connections to applications on seperate servers. I have checked all the trunk ports, server ports, and client ports and there are zero errors. I can ping the servers with no dropped packets. The problem started immediately after installing the new switches and since it's on multiple servers at the same time in multiple locations it seems like it has to be a network problem.