We have a internet connection from our ISP that is on a fiber line. Speeds are good when tested directly to a PC from their router, we get a full 20mbps up and down.
When that connection is dumped into a Cisco 10/100/1000 dumb switch to allow us to split it off then we loose about 2/3 of the bandwidth. The only thing connected to that switch during testing was the PC and the ISP's router. We also tried 3 other dumb switches and new patch cables with the same or similar results.
Any help would be appreciated.