[ppml] PIv6 for legacy holders (/w RSA + efficient use)

[Keith W. Hare]

> 
> > Why whould an organization agree to a technology that ties 
> them to an ISP?
> 
> surely ipv6 and ipv4 are equivilient in that regard, and it's 
> only newly
> allocated vs. oldly allocated address blocks of either family 
> that differ?

With IPv4, NAT allows one to isolate most of the internal network by
using non-routable addresses.  So, switching ISPs means renumbering the
external nodes and revising some firewall rules.

With IPv6, without NAT, switching vendors with PA space means
renumbering both the external and the internal network.


Keith