Hello, I've (re)read the whole big thread on the recent discussion about the RA M/O flags starting at around end of May. We even had a meta-level discussion about whether those flags might better be removed altogether (again!), but it looks we agreed that we need at least some kind of indication in RA.
While opinions on the details so varied, we seem to have agreed that we need to fix the requirements for those flags (or something similar/replacement in RA) first. Based on a nice initial attempt by Ralph... http://www1.ietf.org/mail-archive/web/ipv6/current/msg05141.html ...I'd summarize the requirements raised in the thread as follows: 1) Ability to indicate to a host "DHCP is not available on this link", with the expectation that the host won't send any DHCP messages 1') Some people (one person?) also wanted the ability to indicate to a host "a particular type of DHCPv6 (i.e., ICB or HCB) is not available on this link" (This is probably a combination like M=0&&O=1 would currently indicate) 2) Ability for a host to get all desired and available DHCP configuration with a single DHCP message exchange - if a host wants HCB, it sends an HCB request (Solicit) and receives HCB and/or ICB replies - if a host wants ICB, it sends an ICB request (Information-request) and receives ICB replies 3) Ability to do DHCP without having to configure routers (e.g., by ignoring RA with M=0 and/or O=0 and invoking HCB and/or ICB anyway) Am I missing anything? Note that I'm not saying we need all of them; I'm currently trying to list all major points raised in the past discussion. Some of those may turn out to be a non-requirement. Once we can fix the list, we'll then start the main discussion of which is really necessary and how to do that. (And I'd like to not start that type of discussion at the moment so that we can move forward step-by-step, avoiding further confusion or divergence). JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. [EMAIL PROTECTED] -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
