IPv6 woes - RFC

Tue Sep 14 20:44:44 UTC 2021

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 at 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
>
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