[ppml] IPv6 flawed?

[michael.dillon at bt.com]

> 	Connected networks need communication between admins 
> for smooth connectivity during transitions..  

There are parallels here with the way people renumber nameservers. Many
sites on the Internet will have your old address cached for some period
of time. In some cases, a long-running application could have it cached
for months. And if you make use of DNS slave servers at another
organization, they have your address hard-coded in their config.

A good way to renumber nameservers is to a) notify slave server admins,
b) turn on the new addressing, c) maintain the old addressing on you
master servers for a transition period, d) monitor the master server's
traffic, e) followup any sites using the old address for too long, and
finally f) stop using the old addresses.

IPv6 only handles steps b and f automatically. However, the fact that
IPv6 has this two-step process built-in, is new for the base level
network renumbering of routers, servers etc.

--Michael Dillon