uTorrent Stops Router

[smedway]

I have been reading many posts about this. It seems to be fairly common in different versions. The problem is this: uTorrent works fine for several minutes into a file and then slowly brings down the d/l speed and u/l speed to 0.0. This only seems to happen on files with a larger number of peers and/or seeds.

What I have done:

Unchecked DHT

Adjusted download/upload speeds to 400k d/l and 200k u/l

Limited connections to 50 global and 20 per torrent

Replaced Router

What I am using:

Mac OSX 10.6.8

Cisco E2500 (just installed over an outdated Netgear model)

uTorrent 1.5.11 (B)25801

I have just tried again allowing uTorrent to automatically adjust bandwith. Top download speeds are 48k and are mainly 10k-20k while uploads fare better averaging 80k - 130k.

Restarting uTorrent works for a few minutes and then the bottle neck starts again. Symptoms are the trickle download - to stop and then the other internet connections in the house go down too. The previous router required a manual/hard reset but the new one does not. I just have to exit uTorrent and sometimes restart the computer. What I would like to know if there are additional settings I should be looking at within uTorrent or my router and if so what are they. I am not advanced, but not a beginner, as far as the connections are concerned. Any suggestions would be welcome.

[smedway]

UPDATE:

I deleted preferences and restarted the downloads. I am now getting 600k - 700k downloads with no adjustments or tweeks. Information on deleting preferences is in the troubleshooting sticky at the beginning of the forum, for anyone else who needs help with this.

The initial problem seems to be caused by overload to a router. There are just too many connections and too much information for the router to deal with.

If you are having this problem and have an older router uncheck DHT and half or third your peer connections. I would also recommend manually adjusting your download/upload speeds to what ever the average is before the crash begins or just under it. If you can update your router, but if that is not in your budget then tinker with the connection settings in the preferences. If this is happening with a newer higher capacity router then try deleting your preferences manually.