From owner-freebsd-questions Sun Sep 2 19:16:56 2001 Delivered-To: freebsd-questions@freebsd.org Received: from TYO202.gate.nec.co.jp (TYO202.gate.nec.co.jp [202.247.6.41]) by hub.freebsd.org (Postfix) with ESMTP id E1F0B37B401 for ; Sun, 2 Sep 2001 19:16:50 -0700 (PDT) Received: from mailgate4.nec.co.jp ([10.7.69.195]) by TYO202.gate.nec.co.jp (8.11.6/3.7W01080315) with ESMTP id f832GiQ08858 for ; Mon, 3 Sep 2001 11:16:44 +0900 (JST) Received: from mailsv4.nec.co.jp (mailgate51.nec.co.jp [10.7.69.190]) by mailgate4.nec.co.jp (8.11.3/3.7W-MAILGATE-NEC) with ESMTP id f832Gfl27859 for ; Mon, 3 Sep 2001 11:16:42 +0900 (JST) Received: from direct.ksp.nis.nec.co.jp (direct.ksp.nis.nec.co.jp [10.57.24.78]) by mailsv4.nec.co.jp (8.11.3/3.7W-MAILSV4-NEC) with ESMTP id f832GSP11503 for ; Mon, 3 Sep 2001 11:16:32 +0900 (JST) Received: from direct.ksp.nis.nec.co.jp (canna.ksp.nis.nec.co.jp [10.57.24.103]) by direct.ksp.nis.nec.co.jp (8.9.3+3.2W/3.7Wksp_mx_2.0) with ESMTP id LAA03193 for ; Mon, 3 Sep 2001 11:16:27 +0900 (JST) Message-ID: <3B92E7D6.833229B3@direct.ksp.nis.nec.co.jp> Date: Mon, 03 Sep 2001 11:15:50 +0900 From: "Qin, Li" X-Mailer: Mozilla 4.73 [ja] (Win95; U) X-Accept-Language: ja MIME-Version: 1.0 Cc: freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD 4.3 doesn't support multicast for IPv4 by default? References: <200108311453.f7VErEJ57679@web.cs.ndsu.nodak.edu> Content-Type: text/plain; charset=iso-2022-jp Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG It seems you're right: According to the message of tcpdump, the packet header of 'j 224.1.1.1 192.168.24.86' command of mtest program is 'foobar.com > 224.1.1.1: foobar.com > 224.1.1.1: igmp v2 report 224.1.1.1 [ttl 1]' and 'foobar.com > ALL-ROUTERS.MCAST.NET: foobar.com > ALL-ROUTERS.MCAST.NET: igmp leave 224.1.1.1 [ttl 1]' when executing 'q' command. It proved multicast is supported though, still cannot get the echo of ping at the multicast address, in this case, 224.1.1.1 on another machine :( mark tinguely wrote: > > FreeBSD and almost all network cards support Multicast by default. > > The only kernel changes that are required is when you want to run > a Multicast router on the machine. > > most likely you have a firewall rule that is blocking multicast from > being sent and recieved. > > if you do not have any firewall rules enabled, run tcpdump on the interface > and then start a mulitcast program (sdr, vic, vat, rat). The multicast > program will make an announcement to the network that it has joined the > group that you should see on the tcpdump. > > --mark tinguely. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message