From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stef Coene Date: Tue, 13 Aug 2002 07:54:18 +0000 Subject: Re: [LARTC] htb3 & imq Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org On Tuesday 13 August 2002 01:07, Tobias Geiger wrote: > Arindam Haldar wrote: > > hi Alex, > > thanx so much.. :) .. thanx to all > > my IMQ & htb3 test rules are working ok.. the best part--> imq handling > > both in & out traffic now.. :) > > I also had this setup, and i also thought of it as a "cool thing" :) > but then Patrick told me, that it's not so clever: the incoming traffic > must pass 2 qdiscs (interface-qdisc and imq-qdisc) and this is bad/not > good because > 1) cpu - overhead (but this could be negleted) AND > 2) these 2 qdiscs COULD drop packets and no one would know of the other > having dropped s.th. -> retransmit > ok. case 2 is not so realistic, as the qdisc on the interface normaly > is the qfifo but nevertheless point 1) and the possibility of 2) made me > think that queing double unnecessary. Basic incoming shaping can be done with the ingress qdisc and the policers. This is not a real qdisc with a queue, but it can throttle down incoming packets without creating extra delays. It just droppes incoming packets untill the wanted rate is reached. Stef -- stef.coene@docum.org "Using Linux as bandwidth manager" http://www.docum.org/ #lartc @ irc.oftc.net _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/