On Tue, Jul 26, 2011 at 6:03 PM, Alexandru Petrescu < alexandru.petre...@gmail.com> wrote:
> Comments on draft draft-lynn-6man-6lobac-00: > > - needs a section on multicast address mapping; it may not be > straightforward: it may need to _not_ send all ip-multicasted messages to > 255 link-layer address: the solicited-node multicast address includes the > octet address (as opposed to eg ethernet 6octets) hence it could send it to > that octet address (not 255). > > The current version is -01; see section 9 It is a non-goal (perhaps this should be stated explicitly in the I-D) to modify the current MS/TP state machines (other than the extension for larger data frames already proposed in BACnet). The only currently available option is 255 (all-nodes). We *could* look at MS/TP as a multicast challenged data link and support functions like NS via RFC 4861 extensions as discussed in IPv6 ND Optimization for Energy-aware Devices<http://tools.ietf.org/agenda/81/slides/6man-8.pdf> Plan B would be to look at using the 128-254 address range for multicast mapping, but then we diverge from co-existence and possibly need to modify state machines. > - 1 Poll for Master - sounds as RS, why not mapping one into another? > 2 Reply to Poll for Master sounds as RA, same. > > These are MAC control frames that are part of token generation (or recovery from a lost token). Again, modification of the MS/TP MAC is a non-goal. See section 2 for MS/TP MAC requirements. > - MLD mapping could be as well useful. > > Can you say more about this? Thanks, -K- > Alex > ------------------------------**------------------------------**-------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: > https://www.ietf.org/mailman/**listinfo/ipv6<https://www.ietf.org/mailman/listinfo/ipv6> > ------------------------------**------------------------------**-------- >
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