Date: Thu, 17 Apr 2008 08:55:58 GMT From: bms@FreeBSD.org To: 4pr@legis.krsn.ru, bms@FreeBSD.org, freebsd-net@FreeBSD.org Subject: Re: kern/122839: [multicast] FreeBSD 7 multicast routing problem Message-ID: <200804170855.m3H8twoK094070@freefall.freebsd.org>
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Synopsis: [multicast] FreeBSD 7 multicast routing problem State-Changed-From-To: open->feedback State-Changed-By: bms State-Changed-When: Thu 17 Apr 2008 08:49:01 UTC State-Changed-Why: The symptoms you describe do not sound like a multicast routing issue. Given your description it sounds like the ethernet drivers are not implementing ALLMULTI correctly. If the ALLMULTI flag is appearing in the ifconfig output for the interfaces involved, that is the correct behaviour. The multicast forwarding code *requires* that the card supports ALLMULTI correctly. However ALLMULTI has historically been known not to work correctly with certain network adapters, and in this case it could be a firmware issue. For example I saw an issue with fxp last week whereby the card wouldn't send multicast traffic unless the group had also been joined, which violates POLA. Can you ping Pyun YongHyeon and/or Jack Vogel about this? Both have been working on the msk and em drivers recently so they can better advise you about possible driver problems. Thanks. http://www.freebsd.org/cgi/query-pr.cgi?pr=122839
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