I have a network split over several small offices. At one office, serving about 30 users, I'm seeing some machines getting much better network speeds than other. I have a patch panel plugging into two unmanaged switches, each of which connect to a port on a managed Cisco switch, which converts to fiber going back to my main office.
When I do a speed test on a PC plugged into port 230 on my patch panel, which plugs into Switch A, I get 90MB down. The PC on port 231, plugging into Switch B, gets inconsistent speed, ranging from 3-30MB down. Upload is similarly inconsistent. I've tried switching Port 231 into Switch A, but it gets the same results. Also, other ports from my patch panel are getting similarly split results, independent of the unmanaged switch that they plug into, some between 75-90 down, others spiking from 3 up to 30 and back. I've tried using one laptop in both the fast ports and the slow ports, and the laptop's results mirror the prior results.
I've tried doing a packet capture, but I don't really know what to look for on this problem.
Anyone have any idea of where I can look to figure out what the problem might be?
EDIT: Well, I went to trouble shoot and the problem stopped. So...the mystery remains, but the problem does not. If I wasn't short staffed, I'd spend more time looking into this, but unfortunately, I don't have the luxury. Thanks for the help, everyone!