I find myself rushing to Peter's defense when it is unlikely he needs it. However...
From: Paul Ferguson [SMTP:pferguso @
Sent: Friday, April 18, 1997 11:44
To: Peter da Silva
Cc: Phil Cox; mjr @
net; Firewalls @
Subject: Re: IPSEC / IPV6 and Firewalls & Network Security
At 11:15 AM 4/18/97 -0500, Peter da Silva wrote:
>We're still running out of network addresses. We need to break with IPv4
>sometime. It's not a matter of whether to go with IPv6, but when.
This is a common misconception.
[fg=> ] No, it isn't. If you split hairs, you are correct that the Internet is far from using all 2e32 (what is that? About 2 billion?) addresses available with IPv4. When one considers how the Internet community allocated those addresses in groups and how backbone routers are designed to handle those groups (and the age of the equipment and cost to replace) one realizes Peter is perfectly correct. Mathematically the Internet is not about to use the last addresses of the IPv4 address space. Practically speaking the easy and inexpensive options of allocating and routing IPv4 address space are near spent and if one is going to upgrade equipment one may as well go with expensive new IPv6 equipment instead of expensive new IPv4 equipment, n'est pas?