weird speed problem

[kevinsd1234]

I've read the forum and cannot find any similar issues.

I have Verizon Fios, 5mb down and 2mb up. I chose a fixed port 65433, and I verified that the port is forwarded to the pc, Utorrent Speed Guide says port is forwarded OK.

upload limit: 186 kb/s

upload slots: 8

conneciton: 100

connection global: 750

max active torrent: 9

It seems that everything is set correctly because when I download one torrent with good seeders and large swarm, I'd get around 600 kb/s download, this is very close to my download limit.

The problem starts when I start a second torrent, both torrents would download at a combined speed of less than 100 kb/s!

The weirdest problem is that if I stop the second torrent, the first torrent that was downloading at 600 kb/s now only download at around 20 kb/s!

Close utorrent, retart it, and the first torrent still download at 20 kb/s!

I suspect that it was the router, so I reboot the router, the problem remains!

In short, once I start a second torrent, the first one loses all its speed, and I can't get it back even after stopping the second torrent, restarting utorrent, and rebooting the router.

PLEASE HELP!!

Regards,

Kevin

[Switeck]

Probably networking hardware overloading going on there.

Speeds are fine, technically ALL your settings would be fine *IF* your networking hardware and software was actually stable enough to handle the other settings.

If you're running 1 torrent, the max number of connections it can make is limited to the per-torrent limit of 100. You start a second torrent, and you can potentially get 200 total connections. And your router overloads somewhere above 100 connections but below 200.

My first guess is you have a Belkin router.

My second guess is D-Link.

A nasty/fun combination would be a wireless Belkin router that you connect to using a D-Link wireless card that's connected to your computer via USB -- as that would be guaranteed disaster, especially if you have multiple other USB devices connected and/or the USB is running in v1.1 or v1.0 mode. Chances are you probably don't have USB v1.0 or v1.1 if everything else is true, as its max speed is too close to the max download speed you're seeing -- 600 KiloBYTES/second.

1st and 2nd links in my signature hopefully will help you more than I have.

[kevinsd1234]

Thank you. I think you point me toward the right direction. My router is Asus WL-500g Premium running Oleg Firmware. I will read more on this firmware to see if anybody has this same problem. And yes, the Asus has 2 USB ports taken by one printer and a mass storage device (500gb external hard drive)

I suspected that it was the router, but did a reboot and nothing changed. I will do another test to see what happen.

For now, my solution to multiple downloads is to set my total torrent to 1 and queue everything, this doesn't help much when the current download is being slow simply because there's little seeds and no swarm.

Do you recommend changing the connection per torrent down to say 60?

If my router cannot even handle 200 connections then the global setting of 750 connections is useless right?

Also, assume that my router has no problem what is the maximum number of connection is optimum?

Thanks for your help, sorry for asking too much

Regards,

Kevin

[Switeck]

Do you recommend changing the connection per torrent down to say 60?

Yes...even 60 is probably overkill for MOST torrents, but always nice to have for that tiny bit of extra download speed.

If my router cannot even handle 200 connections then the global setting of 750 connections is useless right?

Correct.

I recommend lowering global max to 100. Even then, you could allow 2 or 3 torrents at once, though the last torrent may have to "fight" to get any connections.

My recommended speed settings you will find a LOT more conservative than Speed Guide (CTRL+G), but even it probably is too much for your line due to the number of connections max.

You could also try to intentionally CRASH uTorrent/your computer/network/etc...then try turning the router off then back on to see if it magically corrects itself. If it does, chances are it's not the computer that's the bottleneck. (However clearing up half open connections may occur even if the connection's down, which makes this "test" not as simple as it first appears.)

Disabling DHT, UPnP, LPD, and Resolve IPs tends to lighten the load on overloaded networking hardware and software. It's a good idea to leave peer exchange enabled though, as unlike those other features it reuses existing peer/seed connections instead of making new/more connections.