It was the original intent that all IPv6 nodes implement the correspondent node side of Mobile IPv6, even if they are not a mobile node. This was considered one of the benefits of IPv6 (i.e., improved Mobile IP).
However as Itojun points out, all current (and soon to ship) product IPv6 implementations do not include route optimization now because the standardization of Mobile iPv6 has taken some time. [Please note this is not a criticism of Mobile IPv6, just observation of the current situation.] It doesn't seem right to make them non-compliant (i.e., make RO a MUST). Perhaps we can come up with some text for a very strong SHOULD, or make it a MUST for new IPv6 implementations. Independent of how this is resolved, I think the best place to define the route optimization implementation requirements for all IPv6 nodes is in the IPv6 Node Requirements document. I don't think it should be in the Mobile IPv6 specification because at a minimum implementers not planning to implement Mobile IPv6 might not see it. There is a design team effort underway to produce an IPv6 Node Requirements draft and I think they should have an -00 version out soon for w.g. review and comments. This discussion is important input into this document. Bob -------------------------------------------------------------------- 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] --------------------------------------------------------------------
