jinmei, Thank you for your comment.
The draft assumes that a minimum host sends/receives ND related link-local multicast without MLD, and Hop-by-Hop Options Header is also unnecessary. I'm not aware that L2 switch may drop the packets without MLD as you mentioned. But, how serious the problem is? We developed a kind of minimum host that is almost based on this draft, and ran over a hundred of the hosts on a IPv6 network in N+I Tokyo 2001. However, we have never seen the problem. From: JINMEI Tatuya / 神明達哉 <[EMAIL PROTECTED]> Subject: a short comment on draft-okabe-ipv6-lcna-minreq-00.txt Date: Sat, 17 Nov 2001 15:55:40 +0900 > (I think the ipng ML is the best place to discuss the issue, but > please correct me if this is not appropriate.) > > I've taken a quick look at draft-okabe-ipv6-lcna-minreq-00.txt and > have a short comment (or a question). > > The draft says > > 2.3 Multicast > Multicast is not treated in this draft, and it is the candidate for > further study (RFC 2375[8], RFC 2710[9]). However, the multicast > related to neighbor discovery is considered. > > So the minimum implementation must join some multicast groups for > neighbor discovery (e.g. solicited node groups). This means the > implementation should perhaps support MLD, because there will be L2 > switches that filter multicast packets unless the switches hear MLD > reports for the multicast group. This will even be the case for > link-local groups, as in IPv4 multicasts. Since MLD needs a > hop-by-hop router alert option, the implementation should support > the hop-by-hop options header as a consequence. > > However, this draft also says > > 3.1.1 Hop-by-Hop Options Header > [Sending] > Following 3.1, minimum hosts do not send packets with this extension > header. > > This seems to contradict with the fact above. I think the draft > should clarify this point. ---- nobuo -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
