New Zealand ADSL Mailing List


QoS

From: Tom Parker <tom_at_carrott.org>
Date: 6 Sep 2003 16:28:26 +1200
Message-ID: <1400.379T1300T9883399tom@carrott.org>

Bryan Manson <Evil_Bry@xtra.co.nz> wrote:

>Why should it be the ISP's responsibility to configure their network solely
>for the usage styles of one user? I can guarantee that the majority of the
>users would not find the shaping of gaming traffic (at priority) to their
>liking. If you feel this is a critical part of your connection, set up QoS.

My understanding is that to be effective, QoS has to be implemented at the
transmitting end of the bottleneck. Basically there is a queue somewhere which
must let game traffic go to the front. The fact that the ISP is sending
your game packets before all your other packets doesn't have any effect on
anyone else's link as it wouldn't give you any more bandwidth than if they
were forwarded in the order that they arrive.

Assuming the above is true, if the Telecom rate limiter is the bottleneck, how
can QoS work if it isn't implemented by Telecom in the rate limiter? For it
to work, does the ISP have to introduce it's own rate limit slightly below
Telecom's in order for the queue to build up in a device that the ISP
controls?

If such a strategy works, can I do that at my end of the link? If it does
work, what I should read up on to do this with Linux?

My biggest beaf with jetstart is updates from ftp.nz.debian.org saturate the
link and make browsing almost impossible.

--
Tom Parker - tom@carrott.org
           - http://www.carrott.org
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Received on Sat Sep 6 16:28:37 2003

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