[AusNOG] Comcast trialling IPv6

[Mark Smith]

On Thu, 28 Jan 2010 08:56:26 +1030
Matthew Moyle-Croft <mmc at internode.com.au> wrote:

> http://www.comcast6.net/
> 
> That's great news.   As one of the largest access providers, well, in the world, having them pushing ipv6 is great news.
> 

In some respects it isn't surprising, as a major contributor to IPv6,
Alain Durand, works them. What I found a bit surprising a few years back
was that one of their major drivers for IPv6 wasn't public address
space, but size limitations of the RFC1918 private address space. As a
cable provider, they use RFC1918 addresses internally to manage their
customers' CPE, and despite RFC1918 consisting of a /8, 16 /16s and
256 /24s, it wasn't big enough. NATting might not have been an
option to get around this, as they possibly need universal any-to-any
reachability between their management systems and their customers' CPE,
which is the Internet Protocol property that NAT takes away.

Regards,
Mark.