Re: Comcast cablemodems and IPV6

[Chuck Yerkes <chuck+obsd@2004.snew.com>]

Quoting robert (r@dls.net):
> > -----Original Message-----
> > From: stan
> > Subject: Comcast cablemodems and IPV6
> > 
> > I see some indication on the Debian list that some Comcast cablemodem
> > users may be getting IPV6 address.
> > 
>
> Has anyone here seen evidence of this?
> That doesnt really make any sense. Comcast must have implemented
> Something to still deliver ipv4 content/traffic to an ipv6 enduser.

Really?

That direction is straightforward.  IPv4 fits in IPv6 (over and over).

10 years of work hasn't accounted for making it EASY to use
IPv6 on a backbone with IPv4 "islands" on the edges?

IPv4 *is* set aside  as a (tiny) part of the IPv6 space.  My
6bone allocation gives me something like 65000 INTERNETS worth
of address space.

For edge management, I use faithd as a 6->4 gateway on my edge.

I'd assume that if you had IPv6 in your home, then you would
send IPv6 packets out to your provider until it hit an 'edge'
that needed to be IPv4 and the packet was converted down.
(vaguely think NAT).

As v4 packets come IN, they'd get the IPv4 prefix added to the the
address to become IPv6.  Your client would see a 6 address.


Me?  I'd love to see a large consumer ISP start to really get their
feet wet with IPv6.  It's about time.