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BitTorrent causing packet loss?!
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ashibaka
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Joined: 11 Jan 2003
Posts: 107

PostPosted: Thu Feb 26, 2004 10:25 pm    Post subject: BitTorrent causing packet loss?! Reply with quote

I don't understand this, myself... I have one BitTorrent upload running at 20KB/s, and I get terrible packet loss:

ashitaka@kamineko ashitaka $ ping 4chan.net (4chan.net is in my /etc/hosts-- when running BitTorrent, the packet loss is too bad to contact DNS)
PING 4chan.net (66.111.38.62) 56(84) bytes of data.
64 bytes from 4chan.net (66.111.38.62): icmp_seq=6 ttl=49 time=159 ms
64 bytes from 4chan.net (66.111.38.62): icmp_seq=7 ttl=49 time=105 ms
64 bytes from 4chan.net (66.111.38.62): icmp_seq=16 ttl=49 time=102 ms
64 bytes from 4chan.net (66.111.38.62): icmp_seq=19 ttl=49 time=136 ms
64 bytes from 4chan.net (66.111.38.62): icmp_seq=22 ttl=49 time=144 ms

--- 4chan.net ping statistics ---
23 packets transmitted, 5 received, 78% packet loss, time 22015ms
rtt min/avg/max/mdev = 102.426/129.801/159.859/22.479 ms

Now, I kill the BitTorrent, and things are fine!

ashitaka@kamineko ashitaka $ ping 4chan.net
PING 4chan.net (66.111.38.62) 56(84) bytes of data.
64 bytes from 4chan.net (66.111.38.62): icmp_seq=1 ttl=49 time=99.5 ms
64 bytes from 4chan.net (66.111.38.62): icmp_seq=2 ttl=49 time=61.6 ms
64 bytes from 4chan.net (66.111.38.62): icmp_seq=3 ttl=49 time=72.4 ms

--- 4chan.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 61.692/77.921/99.596/15.946 ms
ashitaka@kamineko ashitaka $

This has only been happening since I bought a new router.

Any diagnosis?
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carbon
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Joined: 27 Jun 2003
Posts: 455
Location: New York

PostPosted: Thu Feb 26, 2004 10:34 pm    Post subject: Reply with quote

if the upload is maxing out, you will experience packet loss.

Use some traffic shaper.

search for traffic shaper, you will get tons of info (is that good, i dont know)
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ashibaka
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Joined: 11 Jan 2003
Posts: 107

PostPosted: Mon Mar 01, 2004 4:00 am    Post subject: Reply with quote

Gah, I've been trying to use this "wondershaper" thing, but it just tells me to read the README, and the README doesn't have any instructions for cable modems, only for dial-up.
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carbon
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PostPosted: Mon Mar 01, 2004 5:42 am    Post subject: Reply with quote

you will need a couple things,
assuming you are using 2.6.3 kernel, emerge the latest iptables.

where are you running your bt.
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