Hi Ulrich, I did review the you cited in your earlier e-mail (RFC 5889). It seems that RFC suggests that link local addresses not be generated for interfaces with undetermined link characteristics (which certainly apply to route over protocols like ROLL RPL and the MANET protocols).
However, in looking 6LoWPAN ND (RFC 6775), isn't assignment of link local addresses to such a topology exactly what is going on? If you add ROLL RPL (RFC 655) to this deployment scenario and specifcally with the illustrative examples in Annex A, it seems clear that a multi-hop subnet is exactly what is described. Next, if someone were to want to support a protocol like mDNS (RFC 6792) which uses link locals, how could that be supported using RFC 5889? I think these are important topics as we seemed to have to go to extremes in our work (ZigBee IP) to deal with ULAs when it would have been great if link locals were available in the context of a route over protocol like ROLL RPL. Don On 7/24/13 8:32 AM, "Ulrich Herberg" <ulr...@herberg.name> wrote: >I have pointed out two documents in my earlier email that explain in >long detail why I believe that multi-hop subnets are a really bad >idea. The AUTOCONF RFC 5889 presents an architecture for avoiding all >these problems by using /128 prefixes. In that regards, a subnet wide >flooding would be fairly uninteresting, as it would not go beyond a >single router. > >Regards >Ulrich > >On Wed, Jul 24, 2013 at 7:58 AM, Michael Richardson ><mcr+i...@sandelman.ca> wrote: >> >> I would still like an explanation of why "subnet" is the wrong term. >> >> When would scope-3 would be used such that it would not correspond to >>the set >> of links on which a "/64" (or other size) is used? >> >> -- >> Michael Richardson <mcr+i...@sandelman.ca>, Sandelman Software Works >> >> >> >> _______________________________________________ >> Roll mailing list >> r...@ietf.org >> https://www.ietf.org/mailman/listinfo/roll >> >_______________________________________________ >Roll mailing list >r...@ietf.org >https://www.ietf.org/mailman/listinfo/roll -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
