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IPv6 mistakes, was: Re: Looking for an IPv6 naysayer...

> One example I heard was a generic financial exchange connected to
> perhaps a hundred other companies. Those companies also connect to the
> Internet but the exchange itself does not. It's valuable for the
> exchange to use addressing which will not conflict with any of its
> customers' RFC1918 use or overlap any Internet destinations they want
> to access.

Sounds like SFTI in New York

In turn, SFTI is connected to the Radianz global IP network which
allows financial industry
companies in other countries to access the NYSE services on SFTI. And
the Radianz
global IP network has over 15,000 sites connected to it in some 200
countries. Probably
all of the companies connected to Radianz also have an Internet
connection, but nobody
passes packets between Radianz and the Internet.

Radianz is an example of a COIN (Community of Interest Network).
Outside the Financial Services
industry there are similar COINs in the air traffic industry (SITA)
and the auto manufacturing industry.
If you diagrammed these COINs on a typical Internet diagram, they
would be a thin layer, one AS thick,
wrapped around some portion of the cloud's perimeter. Invisible to
most because they connect but
do not exchange transit traffic.

Zoom in an look at ASCustomer which peers with three ISP ASnumbers and
also peers with ASRadianz.
But the traffic from ASRadianz is controlled by firewalls and internal
routing in ASCustomer so that it
only goes to the trading workstations, while the Internet traffic is
allowed pretty much everywhere.

You could make various biological analogies such as the specialised
layers of human skin cells or
the micturating membrane in amphibians.

--Michael Dillon