Date: Mon, 14 Sep 2009 13:54:54 -0500 From: Dan D Niles <dan@more.net> To: freebsd-questions@freebsd.org Subject: Traffic Shaping Bridge with Dummynet Message-ID: <1252954494.858.35.camel@jane.spg.more.net>
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I am trying to do traffic shaping using a bridge on FreeBSD 7.1. I have the bridge configured and it works fine. It looks like this: rest of network <-> xl0 <-> bridge0 <-> xl1 <-> side to be shaped It works with the following set of ipfw rules (pipes in but unlimited bw): network=10.10.10.0/24 limit=0 ipfw -q -f flush ipfw -q pipe 1000 config mask dst-ip 0x000000ff bw $limit ipfw -q add pipe 1000 ip from any to $network via xl1 ipfw -q pipe 1001 config mask src-ip 0x000000ff bw $limit ipfw -q add pipe 1001 ip from $network to any via xl1 ipfw -q add 60000 allow all from any to any If I change the limit to 1Mbit/s (or anything else) it stops passing traffic. I used tcpdump and I can see the traffic on the bridge but I cannot see it after the bridge. However "ipfw -a list" shows the counts for the pipe going up, which doesn't make sense to me. I've tried adding: ipfw -q add allow all from any to any via bridge0 ipfw -q add allow all from any to any via xl0 before the pipes. I also tried moving the pipes to bridge0 and xl0. The docs on bridging (http://www.freebsd.org/doc/en/books/handbook/network-bridging.html) says "The bridge can be used as a traffic shaper with altq(4) or dummynet(4)." So what am I doing wrong? What else do I need to do to limit the bandwidth over a bridge? Thanks, Dan
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