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ubald
n00b
Joined: 14 Jan 2005
Posts: 48
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 Posted: Thu Aug 18, 2005 2:57 pm Post subject: shaping : need help with "tc qdisc tbf"- command |
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Hello!
My shaping problem is very simple, without any priorizing or similar:
I just want to hard-limit the outgoing bandwidth on my server to 180 kbit because it shares DSL (2000/192) with my Desktop-PC.
The server takes as much upstream as it gets but not much downstream. There are no possibillities to limit bandwidth inside applications.
My first try:
| Code: | | tc qdisc add dev eth0 root tbf rate 180kbit latency 500ms burst 1540 |
The problem is that I don't get any good internet-performance on the other PC, and I tried also to use the peakrate-option, and finally got there with a reasonnable performance:
| Code: | | tc qdisc add dev eth0 root tbf rate 130kbit latency 50ms burst 1550 peakrate 161kbit mtu 1600 |
But then, the server uses only the 130kbit all the time, and I would like it to use just as much as possible while having a fast internet on the other PC.
I also noticed that when "burst" is below 1540, I can't use ssh properly, e.g. nano fails. I also tried out different latencies but got nowhere, and peakrate doesn't seem to have much influence at all.
Do you have any suggestions for fine-tuning or could at least explain what latency and burst are there for? (I already have read several good pages about that, but I don't know what consequences they have on rate limiting!)
Thanks |
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tmf
Tux's lil' helper
Joined: 10 May 2005
Posts: 76
Location: Warsaw, Poland
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| Posted: Thu Aug 18, 2005 4:50 pm Post subject: |
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could you share those pages?
tmf |
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ubald
n00b
Joined: 14 Jan 2005
Posts: 48
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| Posted: Fri Aug 19, 2005 8:23 am Post subject: |
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It was mainly this site: http://www.die.net/doc/linux/man/man8/tc-tbf.8.html , but I still don't understand what effect the options "latency" and "burst" have, because they seem to be only important for the data-flow inside the server?
But when I change those values, I get an effect on internet-usage on my other machine, so I really would like someone to explain how to use those options properly, please:D
Thanks! |
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Networking & Security
