From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Hookins Date: Fri, 06 Jan 2006 07:34:43 +0000 Subject: [LARTC] HTB traffic shaping odd effects Message-Id: <43BE1D93.2040409@anchor.com.au> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org 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 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). 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. I occasionally see the tokens for 1:20 go negative... everything is quite strange. Any help would be appreciated. -- Regards, Oliver Hookins _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc