So here's the situation. I'm in a company where roughly 100 workstations, 15 printers, and 8 servers all drain into one closet in which we have a series of 3 Cisco 3500 XL switches (I forget exact model at the moment). The switches are chained together via GBICs with copper firewire. The workstations in the building are almost all using Broadcom NetXtreme Gigabit Ethernet cards (HP machines). At completely random intervals, a machine will drop part way off the network - for example, it will be able to ping servers A, B, and C, but not D, E, F. All servers are running fine and everyone else is doing beautifully. If I go to the switches and change the port the workstation is connected on, it can then see all the servers. If I plug a different machine into the original "problem" port, the new machine can access everything just fine.
Any ideas? The ports on the switch are all auto-negotiate. The NICs are all auto-negotiate. The network cables shouldn't be the issue - it happens with new and old cords.
We never had this problem until we moved to the Cisco switches. Before this, we had the same network setup, but with 3Com switches.
I'm at a loss to what this could be. Any suggestions would be great!
Cheers, - Teros