Hi,
On Dec 8, 2012, at 2:14 AM, Suresh Krishnan <suresh.krish...@ericsson.com> wrote: > Hi all, > > The 4rd draft (http://tools.ietf.org/html/draft-ietf-softwire-4rd-04) > describes a solution for providing IPv4 connectivity over IPv6. The > draft describes the method for mapping 4rd IPv4 addresses to 4rd IPv6 > Addresses. It uses a 4rd specific mark called the V octet in the first 8 V-octet was AFAIR first time discussed within the Softwire MAP design team and I had/expressed my concerns already that time. My argumentation was that we cannot just redefine the u & g bit use without actually having it verified against and reflected in RFC4291. Glad to see it happening now ;) IMHO the current language in RFC4291 does not give enough freedom to use u=g=1, since such combination is not specifically left unused/reserved (although u=g=1 makes no sense for the current IPv6). IEEE allows MAC addresses that have I/G set to 1 and U/L set to 0, which makes me rather uncomfortable with IETF using u=g=1 for their own purposes. - Jouni > bits of the Interface Identifier. There were some concerns raised in > softwire about whether such addresses are actually compatible with the > IPv6 addressing architecture. Whether this is actually compatible with > the IPv6 addressing architecture is outside the scope of the softwire > wg. Hence we would like to hear the 6man wg's perspective on this. I > would like to request the wg to please go over the NOTE in Section 4.5 > page 18, which explains the issue, and over IANA Considerations Section > 6, and chime in on whether this is acceptable from a 6man perspective. > > Thanks > Suresh > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
