Hi David: > > If so, a literal reading of RFC 1112 suggests that multicast > > packets should be treated like any other local addresses. Turns out that the current version is RFC 3376: ftp://ftp.rfc-editor.org/in-notes/rfc3376.txt It not only specifies "perfect" filtering, but a host of other stuff. Also, there's a patch to the (2.4.18) kernel that brings it into IGMPv3 compliance here: http://www.multicasttech.com/igmpv3/ Do you are anyone else know when this patch might become part of the distribution? thanks in advance... don -- Don Hinton <dhinton @ ieee.org> Software Engineer P.O. Box 23524, Alexandria, Virginia 22304 - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html