My network has been running slow for the past couple of months. I am trying to track down the issue. I do not believe it is just one issue but a couple of them. I have a HP 2900-24G switch as the core switch in my network. All resources are plugged into it. Internet, database server, file servers, VM server, PDC, Exchange server and a couple workstations. I have an Adtran 1234 POE that also plugs into it. Connected to the Adtran is the fiber for 2 other buildings and our MPLS router for 3 other locations. The other locations also utilize out internet at this time and access the other servers previously mentioned.
I have ran wireshark on a mirrored port on the HP. What is returned is out-of-order, DUP acks, resets and retransmits. They don't all come from the same source so it is hard to track down. The switch doesn't show any errors.
Is it possible that the HP is over burdened since everything is accessing it? It kind of seems like a bottle neck to me. I can't figure out if that is the cause of the issue or not. Do you have any suggestions to help with traffic flow?