Re: IPv6 /64 links (was Re: ipv6 book recommendations?)

[Masataka Ohta <mohta () necom830 hpcl titech ac jp>]

Karl Auer wrote:

> >          host <-> home UPnP NAT <-> Carrier UPnP NAT <-> Internet
> >          <-> Carrier UPnP NAT <-> home UPnP NAT <-> host
>
> "Trivially"?  I think this looks much nicer:
>
>            host  <->  Internet  <->  host

Yes, if only the Internet were uniform.

However, compared to

                   V6 incapable                 V6 capable
           host  <-> Internet<-> home router <-> Internet  <->

        6/4 tunnel   V6 capable   6/4 tunnel    V6 capable
        end point <-> Internet <-> end point <-> Internet <->

                      V6 incapable
        home router <-> Internet <-> host

which can often be:

                   V6 incapable                 V6 capable
           host  <-> Internet<-> home router <-> Internet  <->

        6/4 tunnel V6 *INCAPABLE* 6/4 tunnel    V6 capable
        end point <-> Internet <-> end point <-> Internet <->

                      V6 incapable
        home router <-> Internet <-> host

> >          host <-> home UPnP NAT <-> Carrier UPnP NAT <-> Internet
> >          <-> Carrier UPnP NAT <-> home UPnP NAT <-> host

is just trivial and uniform.

> The way it used to be before NAT, and the way, with IPv6, it can be
> again.

With IPv6, see above.

                                                Masataka Ohta