On Wed, 14 Nov 2001 [EMAIL PROTECTED] wrote: > This document specifies an extension to the multicast addressing > architecture of the IPv6 protocol. The extension allows for sing > interface-ID to allocate multicast addresses. When the link-local > unicast address is configured at each interface of host, interface > ID is uniquely determined. By delegating multicast addresses at > the same time as interface ID, each host can identify their > multicast addresses automatically at Layer 1 without needing to run > an intra- or inter-domain allocation protocol in the serverless > environments.
I read the draft cursorily, and I must admit I really don't see much of a point.. or perhaps I missed something. Perhaps it would be good to give a concrete example or two where this would be actually usable. Note: it seems to me that the scope of the resulting multicast address must not be greater than the generating unicast address scope. This is because e.g. 'subnet ID + interface ID' in e.g. global scope could clash from the same values from other sites. GLOP-based allocation seems pointless when you can use unicast prefix-based allocations (useful only if you want to zero-configure so that every node can possibly start generating global multicast traffic without assignments from the _site_ owner). Site- and link -local allocations would only seem to be usable within the respective site, or link. Do we _really_ need an automatic allocation for a single _link_, for example? In short, it seems unlikely that _nodes_ would need automatic multicast addresses, apart from a few standard, defined ones. -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords -------------------------------------------------------------------- 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] --------------------------------------------------------------------
