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Date:      Thu, 18 Oct 2001 10:50:17 -0700
From:      Luigi Rizzo <rizzo@aciri.org>
To:        Kenneth Wayne Culver <culverk@wam.umd.edu>
Cc:        freebsd-questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG
Subject:   Re: altq question.
Message-ID:  <20011018105017.A82131@iguana.aciri.org>
In-Reply-To: <Pine.GSO.4.21.0110181341050.15469-100000@rac1.wam.umd.edu>
References:  <Pine.GSO.4.21.0110181341050.15469-100000@rac1.wam.umd.edu>

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On Thu, Oct 18, 2001 at 01:46:06PM -0400, Kenneth Wayne Culver wrote:
> I was wondering if anyone had ever used altq to throttle people on an adsl
> connection. Basically what I want to do make each user share bandwidth
> evenly, but in such a way that they can use all the available bandwidth
> individually if nobody else is using it. However, I also want to be able
> to set aside some of that bandwidth for ssh. The problem is on my machine,
> with dummynet, I can do all this, but when I set it up to limit both
> incoming (608Kbit/s) and outgoing (128Kbit/sec) connections, the ping time
> through the machine goes up by 5 seconds, if I turn off the queuing

either you have set the bandwidth wrong (does "ipfw pipe show"
list the speed you want for the pipes ? can you post its
output ?) or you are doing the measurement on a saturated link,
in which case when you use dummynet with dynamic queues you have 
a lot more buffering going on, and this would explain why you 
see higher ping times (but perhaps without it you see some
large amount of losses) ?

	cheers
	luigi

> options on the outgoing connections/packets, the ping returns to
> normal. Also, I can't figure out with altq how to set up different
> incoming and outgoing bandwidths. Does anyone have any experience doing
> anything like this with altq? if not, can someone tell me how to fix my
> ping problem with dummynet? Thanks.
> 
> Ken
> 
> 
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