Date: Tue, 25 Apr 2006 16:31:12 -0400 From: "Wang, Xi \(GE, Research\)" <wangx@research.ge.com> To: <freebsd-ipfw@freebsd.org> Subject: Dummynet for multicast traffic on FreeBSD 6.0-Release Message-ID: <FA26BEF1EA775E4584FB34B91E14A1C412213B@SCHMLVEM01.e2k.ad.ge.com>
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Hi,=20 I am using ipfw to introduce end-to-end delays for multicast NORM = traffic on=20 FreeBSD 6.0-RELEASE box on which mrouted is running. Without any ipfw rules, I was able to send and receive multicast traffic = from sender and receivers. I was able to observe the multicast information = through "netstat -g" on the FreeBSD box. However, when I introduced the = following rules, I was not able to establish multicast sessions and no receivers can = receive any packets from the sender. # sender ipfw add pipe 1 ip from 10.0.1.1 to 232.0.0.10 out # receivers ipfw add pipe 2 ip from 10.0.2.2 to 232.0.0.10 out ipfw add pipe 3 ip from 10.0.3.3 to 232.0.0.10 out ipfw add pipe 4 ip from 10.0.4.4 to 232.0.0.10 out ipfw pipe 1 config delay 100ms ipfw pipe 2 config delay 100ms ipfw pipe 3 config delay 100ms ipfw pipe 4 config delay 100ms I verified through "ipfw show" that the rules are active. To be sure = that ipfw is actually working, I setup a rule that introduce end-to-end delay between = 10.0.1.1 and 10.0.2.2 and it worked just fine. Does anyone know how to set up ipfw rules to introduce delay between = sender and receivers for multicast sessions? Any suggestion is greatly = appreciated. Thanks, -Xi
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