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From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] qdisc's useless in my case?
Date: Wed, 11 Jan 2006 01:03:18 +0000	[thread overview]
Message-ID: <43C45956.2060600@dsl.pipex.com> (raw)
In-Reply-To: <op.s2536rj9uplg4a@x50.wh242.lan>

André Matuschek wrote:

> Now what I worry about ist if this has any effect at all. Maybe the 
> kernel  sends
> all the Packets from the LAN (from eth0) to the to cable-modems, which are
> connected via 100Mbit crossover-cable and the modem queues the packets  
> itself
> and drops the ones exceeding the maximum upload rate. With an constant  
> empty
> queue in the kernel it would make no differences if fifo_fast or sfq is  
> the qdisc, right?
> 
> So my question is: Am I right? Is it useless to assign sfq to eth1 & 
> eth2?  What would
> be an alternative solution?

Yes you are right. You need to use htb/hfsc/cbq on both eths and limit 
the traffic headed for the internet to < each cable rate. You could use 
sfq as part of the setup, it is better to try and seperate interactive 
traffic from bulk and only use sfq on the bulk. You could also limit 
inbound traffic by shaping on the lan facing eth (if it goes to both lan 
eths then it's more complicated but possible).

Andy.
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      reply	other threads:[~2006-01-11  1:03 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-10 15:05 [LARTC] qdisc's useless in my case? André Matuschek
2006-01-11  1:03 ` Andy Furniss [this message]

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