I have some CAT6 wiring installed in my home with a general topology like following: Cable modem->router->(dumb netgear hub in the closet)->(Dell smart switch)->WiFi AP. I noticed that whenever I access the net via WiFi, network sometimes just stops transmitting data. Attempt to access router by IP in this case will just hang until timeout. Yet I can access WiFi AP. Eventually it will recover. I tried different WiFi access points and symptoms are the same, I don't think it's wifi problem. I suspect that it may be a problem with Dell's hub but since it's intermittent it's really hard to track down.
Dell switch is PowerConnect 2808 or something of the same line that I bought few years ago.
So how do I go about troubleshooting it further? Is there some good piece of software or some other tool that I can use to troubleshoot the problem. May be something that can ping router regularly and give me a time line of outages?