From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Devera Date: Fri, 05 Apr 2002 10:40:25 +0000 Subject: Re: [LARTC] htb ceiling 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 > > tc qdisc add dev eth1 root handle 1 htb default 10 r2q 100 > > tc class add dev eth1 parent 1: classid 1:2 htb rate 5Mbit burst 15k > > tc class add dev eth1 parent 1:2 classid 1:40 htb rate 256Kbit ceil 512Kbit > > burst 15k > > tc qdisc add dev eth1 parent 1:40 handle 40 sfq perturb 10 > > tc filter add dev eth1 parent 1:0 protocol ip prio 100 u32 match ip dst > > 10.0.0.2 classid 1:40 > > > > - this allows 10.0.0.2 to download at 256Kbit, even when it is the only > > machine doing any downloading. I can affect this speed by changing the > > $rate, but changing $ceil has no effect whatsoever. > The ceil will prevent 10.0.0.2 to download faster then 512 kbit. The rate > will say how much 10.0.0.2 can download compare to the other classes (so the > other lines are also relevant :). No Stef, the rate is really measured - it is used as source for DRR weight (here it is used relative to other classes) and to see whether we need to borrow from parent - here absolute value matters. So that the example above should work and give 512k. Gavin, did you tried with only these classes present ? (to have maximaly simplified configuration which exhibits it). If yes and it really does only 256k then post tc -s {qdisc,class} show dev ethXX outputs ... as usual devik _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/