Re: IPv6 woes - RFC

[Shane Ronan <shane () ronan-online com>]

But in fact with local number portability, you cannot rely on the county
code to tell you where to route a telephone call anymore. Which is many
calls result in a data dip to provide you the routing information from a
central repository.

Shane

On Tue, Sep 14, 2021 at 10:07 AM Masataka Ohta <
mohta () necom830 hpcl titech ac jp> wrote:

> Eliot Lear wrote:
>
> > Operators and
> > router manufacturers at the time pushed TUBA, which was considerably
> > less compatible with the concepts used in v4 because of variable length
> > addressing.
>
> That address length is variable is not a problem at all. Byte-wise
> barrel shifters by hardware for CLNP are trivially easy and light
> weight to implement.
>
> The real problem is on the number of prefix bits which must be
> looked up by backbone routers, which means IPv6 abandoning TLA
> is hopeless.
>
> NSAP addresses, which essentially are telephone numbers, assume
> geographically aggregated addresses at country level (so called,
> country code), which is why they don't need large global routing
> tables.
>
> 8+8 has nothing to do with the problem and LISP came a lot later
> as a broken solution for the problem.
>
>                                                 Masataka Ohta