Slashdot: UK ISP PlusNet Testing Carrier-Grade NAT Instead of IPv6

William Herrin bill at
Fri Jan 18 22:00:14 UTC 2013

On Fri, Jan 18, 2013 at 4:46 PM, Jean-Francois Mezei
<jfmezei_nanog at> wrote:
> Should NAT become prevalent and prevent innovation because of its
> limitations, this means that innovation will happen only with IPv6 which
> means the next "must have" viral applications will require IPv6 and this
> may spur the move away from an IPv4 that has been crippled by NAT
> everywhere.

It won't happen and I'll tell you why not.

Client to client communication block diagrams:

Without NAT:

With NAT:

At a high level, the two communication diagrams are virtually identical.

Add killer app. By it's nature, a killer app is something folks will
pay good money for. This means that 100% of killer apps have
sufficient funding to install those specialty relays.

Odds of a killer app where one router can't be replaced with a
specialty relay while maintaining the intended function: not bloody

Bill Herrin

William D. Herrin ................ herrin at  bill at
3005 Crane Dr. ...................... Web: <>
Falls Church, VA 22042-3004

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