[ipv6-wg] Re: Re: [address-policy-wg] Re: Andre's guide to fix IPv6

> The only way these people see achieving this is if they can announce
> their prefix (of whatever size or status) to each of their providers and
> have it form part of everybody's tables.

Why should it form part of EVERYBODY's tables? 

If we had geotop addressing then people could announce their prefix
(of whatever size or status) to each of their providers and it would
only form part of the tables in the same geotopological aggregate,
i.e. the same city. The rest of the world will not see it at all.

There is a REAL problem with assuming that there will be a
*SINGLE* global routing table. We know that there are limits
to the growth of the global routing table due to RAM capacity
of routers, CPU capacity of routers and the time required 
to load a full set of announcements over the circuits connecting
to peers. These are all hard limits that require cash, 
and business cases in order to extend them.

We cannot assume that announcing a route will result in it
being added to the global routing table. It is highly likely
that ISPs will filter announcements on one basis or another
in order to keep their copy of the global routing table small
enough for their network to handle. The end result is 
fragmentation into many global routing tables, none of 
which are complete. And this equals fragmentation of the
Internet with widespread inability to reach other sites.

--Michael Dillon