Works fine for about 5 minutes, then all traffic shuts down ?

[charlie23]

I've been using utorrent for awhile with no problems, but recently I upgraded my computer and now it isn't working.

XP pro SP2, utorrent 1.6.1 build 490

ZTE ZXDSL 832 modem (can't forward ports manually)

100 megabit DSL (BTC in Varna, Bulgaria).

Windows Firewall disabled, Kaspersky antivirus disabled for testing.

When I start utorrent it gets good connections for a couple of minutes, then rapidly tapers to 0. In addition all of my internet (IE6, Yahoo messenger) shuts down. If I pause torrents for 5 minutes or so, or exit then restart, my internet comes back up but the process just repeats itself on relaunching utorrent.

I've been through all the speed guides and tried multiple settings with no luck. I don't think it's a port forwarding issue unless the ISP has recently made changes to settings on their end...2 weeks ago all was good. (they had forwarded my ports previously but my modem is crap and I can't do it myself)

Is there something in my computer that I've missed, or has my ISP gone over to the darkside ?

[DreadWingKnight]

http://forum.utorrent.com/viewtopic.php?id=15992

[charlie23]

thanks. I've been through that and tried what you've recommended without success.

System is:

Windows XP Professional Service Pack 2 (build 2600)

2.00 gigahertz AMD Athlon 64

64 kilobyte primary memory cache

512 kilobyte secondary memory cache

Board: ASUSTeK Computer INC. M2V-MX Rev 1.xx

Bus Clock: 200 megahertz

BIOS: American Megatrends Inc. 0411 12/07/2006

119.29 Gigabytes Usable Hard Drive Capacity

53.33 Gigabytes Hard Drive Free Space

1024 Megabytes Installed Memory

if you really want the .txt file from process explorer then I can upload it somewhere...

[Switeck]

How fast is your connection both down AND up?

If µTorrent is told to use settings too fast for your connection, it could work 'fine' for 5 minutes then overload and shut down.

[charlie23]

down is 907k, up is 239k. Connection is set at 192. Global max upload is set to 17, global max connections is 90. Protocal encryption is enabled, I've tried DHT and UPnP both on and off. I've used the TCP-IP patch and net.max_halfopen is set to 50.

I'll add at this point that I've also tried Bittorrent and Azureus, they do the same thing so it isn't utorrent specific. I saw the post about the AMD dual core problems in DreadWingKnight's thread and updated drivers for my processor and MB (that was the primary upgrade prior to the problems) but no noticeable difference there either.

[Switeck]

"net.max_halfopen is set to 50"

...will KILL your connection pretty quick.

I'm surprised it lasts for 5 minutes!

[charlie23]

hmm...my understanding was that after running the TCP-IP patch for XPsp2, 50 was the correct setting. It was originally set to 10, but nothing seems to have changed anyhow.

[DreadWingKnight]

Increasing your halfopen limit doesn't actually improve speeds.

It does, however, increase the rate at which you will kill sub-standard networking hardware.

[charlie23]

well, I cut it back to 10 but there's still no difference. I'll call my ISP tomorrow and see if they've changed anything and if I can get a better modem, I'm 90% sure that the issue is there someplace. Thanks for your help

[Switeck]

Test with half open limit in µTorrent set first at 4 then all the way down to 1.

If you're STILL having problems then...you've pretty much ruled out high half open rates as the problem.

[charlie23]

A tech from my ISP came today, setup a new modem and forwarded my ports for me. I did reset the half open limit to 4, everything is working fine at this point. Thank you guys again