Packet loss on Airport Extreme for hardwired computers
When accessing the internet, I've been having problems with computers hardwired to my Airport Extreme. I've been testing with one computer at a time on the network. When I run tests at pingtest.net, I've been getting scores of B's and C's for the quality of my connection, and some D's. Always 1-4% packet loss, latency averaging 60ms, jitter averaging 10ms. When I plug that same computer directly into the modem, I consistently get 0% packet loss, 30-35ms latency, 1-3ms jitter. I ran the pingtest 10 times for each setup. I then did the same with 3 other computers.
This only happens with computers hardwired to the AEBS. The same computers via wifi don't have these problems.
Before replacing my AEBS, my question: is this common or acceptable? Or is there something wrong with my AEBS? It seems absurd that the AEBS would cause this much overhead. On wireless, I might accept it, but not on hardwired computers. But, I'm willing to consider otherwise.
Thanks in advance for any insights!
Airport Extreme MC340LL/A, Windows XP