From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Furniss Date: Mon, 09 Jan 2006 01:06:00 +0000 Subject: Re: [LARTC] HTB traffic shaping odd effects Message-Id: <43C1B6F8.5010803@dsl.pipex.com> List-Id: References: <43BE1D93.2040409@anchor.com.au> In-Reply-To: <43BE1D93.2040409@anchor.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Oliver Hookins wrote: > Hi, > > I'm trying to perform some (what I consider) basic traffic shaping on > our network utilising HTB. I have mostly reused the example on the > lartc.org site: > > tc qdisc add dev eth0 root handle 1: htb default 10 > tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbit burst 24k > tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50mbit ceil > 80mbit burst 19k burst 19k will limit you unless your HZ00 > tc class add dev eth0 parent 1:1 classid 1:20 htb rate 1mbit ceil > 1mbit > tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10 > tc qdisc add dev eth0 parent 1:20 handle 20: sfq perturb 10 > tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src > X.X.X.X flowid 1:20 > > So we have a total of 100mbit to be used, the default class 1:10 gets > 50mbit and a ceiling of 80mbit whereas my test host X.X.X.X gets only > 1mbit in any situation. Some rate limiting is definitely happening, but > I am finding the outbound traffic is limited to 2mbit instead of 1mbit. > If I change the rate (to say 10mbit) the outbound traffic gets up to > again twice the rate (in this case 20mbit). Not sure can you show output of tc -s -d class ls dev eth0 while it's running at 2x speed. > > Any thoughts? I have had a look at the tc statistics but it doesn't > appear as I would expect it to. Class 1:10 shows a lot of dropped > packets but it is only averaging around 30mbit constantly. On the other > hand class 1:20 doesn't show any dropped packets. Similarly there are no > packets marked as overlimit for any class. Apart from the 30mbit that would be normal. Andy. I occasionally see the tokens > for 1:20 go negative... everything is quite strange. > > Any help would be appreciated. > _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc