router slow

[admin_2]

I experinece router slowness (console) when a PC opens an application that requests lots of information on the LAN side of the router. I have an access-list applied to the ethernet interface that will only accept traffic from that one PC. I checked the buffers, CPU, memory and interfaces looking for anything strange. Buffers show no failures, lots of memory available, CPU runs at 10% and interfaces show no collisions or ouput errors - nothing. What else can I do to determine the source of the slowness?

[#2]

A LAN is a broadcast domain which means when there are too much broadcast traffic on the subnet

nobody can transmit till the broadcast as been received and process by all parties. also you're using ethernet which uses CSMA/CD

and hence with a chatty server like you have it would always tie up the medium.

The router has nothing to do with this slowness since it never get that much inbound traffic anyway.

Solution, use a switch and put the server in a different subnet, if possible.