The question of proxy/relay DAD for multilink networks that comprise shared links has come up on the NETLMM and Autoconf mailing lists. Proxy/relay DAD is a mechanism whereby NS(DAD) messages are relayed to the link on which a node with a colliding address resides, with the colliding node's NA(DAD) being relayed back to the link on which the soliciting node resides. (The Target Link Layer Address Option in the relayed NA(DAD) must not be changed by the relays to ensure proper SEND operation in this process.)
James Kempf has twice indicated that there have been prior discussions on this subject between Jari Arkko and Dave Thaler, and that they should be consulted for further information (see below), but several attempts to contact them have so far produced no results. To ensure a fair and open dialogue at IETF67, I am requesting that Jari, Dave, James and others with firsthand information address the following questions on the lists prior to the meetings: 1. What are the issues wrt proxy/relay DAD that would interfere with its adoption as a standard mechanism? 2. What harmful on-link assumptions could there be for IPv6 Prefix Information Options that advertise a shared prefix with 'L=0'? 3. Does the RFC1812 "subnet forwarding model" still apply to IPv6, when there are no IPv6 documents that reference RFC1812 normatively? 4. What other non-obvious issues relating to multilink subnets for shared links need to be observed for NETLMM, Autoconf and other contexts? Fred Templin [EMAIL PROTECTED] -----Original Message----- From: James Kempf [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 01, 2006 1:50 PM To: Templin, Fred L; Behcet Sarikaya; Alexandru Petrescu Cc: [EMAIL PROTECTED] Subject: Re: How does "per-MN prefix model" simplify things? (was: RE:[netlmm]Re: PMIP follow-up questions) >You mentioned a while back that there were some discussions >involving IAB and/or IESG members that indicated there might >be some barrier to acceptance of a proxy/relay DAD solution. >Can you say anything more about that? Primarily DaveT's multi-link subnet draft. I think it would be prudent to discuss the issue with him before the WG makes a decision. Also, I think we should check with Jari to find out what he thinks. It is necessary that Jari agree with anything the WG comes up with if we are to get IESG approval. jak -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------