Date: Thu, 8 Jun 2000 08:20:08 -0700 (PDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: freebsd-bugs@FreeBSD.org Subject: kern/19121: IPv4 multicast does not work without route Message-ID: <200006081520.IAA54721@freefall.freebsd.org>
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The following reply was made to PR kern/19121; it has been noted by GNATS. From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: sam@inf.enst.fr Cc: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/19121: IPv4 multicast does not work without route Date: Thu, 8 Jun 2000 11:09:49 -0400 (EDT) <<On Thu, 8 Jun 2000 14:06:27 +0200 (CEST), sam@inf.enst.fr said: > A FreeBSD box on a private network with IPv4 routes to local > network only. No default route has been set, nor any route for > the 224.0.0.0/8 addresses. Then your configuration is broken. If you want to send multicasts, you MUST configure a route for them, end of story. This requirement has existed throughout the entire history of IP multicast under UNIX. Note that it would be an error for packets to be multicast out multiple interfaces simultaneously. The definition of the multicast service model says that hosts MUST NOT do this; only a multicast router is permitted to send the same packet in multiple directions at once. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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