Date: Wed, 23 Aug 1995 13:02:02 PDT From: Bill Fenner <fenner@parc.xerox.com> To: "Michael C. Newell" <mnewell@lupine.nsi.nasa.gov> Cc: hackers@freebsd.org Subject: Re: Multicast on PPP devices Message-ID: <95Aug23.130207pdt.177475@crevenia.parc.xerox.com> In-Reply-To: Your message of "Wed, 23 Aug 95 12:49:55 PDT." <Pine.SUN.3.91.950823154651.15155M-100000@lupine.nsi.nasa.gov>
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I am well aware that it is an accepted practice (esp. see rfc1812) to re-use local addresses. That practice breaks some of the original assumptions of the BSD networking code, in particular, that interfaces are on subnets. The multicast routing code was written with that assumption strongly in mind, and thus multicast routing doesn't work on interfaces which use the same local address. I'm not saying that it's an incorrect practice; I'm saying that if you do this, the current multicast routing code won't work. Bill
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