Dear Naoki, >> 1. Since we are analyzing IPv4 address sharing mechanisms in general (mostly >> 4over6 mechanisms), we are interested in the variant of your design, which >> also includes a NAT somewhere in the network. As far as I understand, the >> only plance where you can put a NAT device is the core - so with your >> design, you can only provide "classic" CGN-type of address sharing, is this >> correct? > > SA46T is just a tunneling technology, that mean, usage of simple > tunneling technology may possible, and usage with combination with NAT > may possible. > > As you mentions, SA46T may use CGN-type method, however, I want say > "address reusable mechanism", not "address sharing mechanism". > > DS-Lite is the technology which combined CGN and tunnel. SA46T may be > used as tunneling technology in DS-Lite. In such case, SA46T provide > address reuse mechanisms with SA46T plane ID. Using SA46T plane ID, same > IPv4 address can be used with different plane ID value. > > I think SA46T may use other than access network. For example, SA46T may > provide IPv4 VPN service over IPv6 only backbone. I feel softwire WG > focus access network too much. > > SA46T does not have address sharing mechanism. However, SA46T-AS have > address sharing mechanism. That is A+P like mechanism. > > SA46T-AS is documented in > http://tools.ietf.org/html/draft-matsuhira-sa46t-as-01 > > In this version, two usages is discussed, one is clients environments, > and other is server environments.
As far as I can see from the SA46T-AS draft, you just embed 16-bit port number in the SA46T-AS address, is this correct? This means, you cannot have a port range, but only 1 port per CPE allocated. I guess I am missing something here? Also, you say in the 5th section, that ICMPv4 doesn't work. But for for this, you can make an ALG, like with other address sharing mechanisms? I think having ICMPv4 work is quite a crucial thing in such a mechanism. --- Question to others: what do you think about this? Should I also include this one into the table of IPv4 address sharing mechanisms? Thanks, Nejc _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
