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Date:      Fri, 31 Aug 2001 11:22:31 +0900
From:      "Qin, Li" <qinli@direct.ksp.nis.nec.co.jp>
To:        freebsd-questions@FreeBSD.ORG
Subject:   FreeBSD 4.3 doesn't support multicast for IPv4 by default?
Message-ID:  <3B8EF4E7.55F5660A@direct.ksp.nis.nec.co.jp>

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Hi,

I installed FREEBSD 4.3-RELEASE on my machine recently, but I start to wonder if
it support multicast for IPv4 by default kernel configuration. I tried mtest on
a FREEBSD 2.2.8-RELEASE box (192.168.24.78) and result is as follows:
> % mtest
> multicast membership test program; enter ? for list of commands
> j 224.1.1.1 192.168.24.78
> group joined
then I can successfully ping the multicast address (224.1.1.1) from any other
machine:
> %ping -c 1 224.1.1.1
> PING 224.1.1.1 (224.1.1.1): 56 data bytes
> 64 bytes from 192.168.24.78: icmp_seq=0 ttl=255 time=0.438 ms
> --- 224.1.1.1 ping statistics ---
> 1 packets transmitted, 1 packets received, 0% packet loss
> round-trip min/avg/max/stddev = 0.438/0.438/0.438/0.000 ms
However, when I did the same on a FREEBSD 4.3-RELEASE one (192.168.24.86):
> %mtest
> multicast membership test program; enter ? for list of commands
> j 224.1.1.1 192.168.24.86
> group joined
while at this time any ping to 224.1.1.1 from another machine couldn't get any
respond.

Do I need to compile a new kernel which support multicast for IPv4, and if so
how can I make it? Your advice appreciated.


Regards,

Qin Li

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