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DragonFly kernel List (threaded) for 2006-06
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Re: ipfw deprecation

From: "Thomas E. Spanjaard" <tgen@xxxxxxxxxxxxx>
Date: Tue, 27 Jun 2006 14:14:11 +0000

Yury Tarasievich wrote:
On 26/06/06, joerg@xxxxxxxxxxxxxxxxx <joerg@xxxxxxxxxxxxxxxxx> wrote:
For bandwidth, ALTQ already provides that. It should be pretty easy to
implement a discipline to do that for packet rates as well. Note that it
only applies to out-going (and indirectly for forwarded) traffic.
So, PF + ALTQ does not allow for incoming bandwidth limitation?

It can technically, but you can't force the other end of the line to control packet output according to rules on your end. What works is limiting recieve/forward buffers so your host sends e.g. source quench messages earlier, but you can never be sure the host on the other end cooperates. Especially not in any complicated priority scheme. The same thing applies for any other solution for bandwidth limiting, be it dummynet, wondershaper, altq or whatever.

        Thomas E. Spanjaard

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