[99596] in North American Network Operators' Group
Re: Access to the IPv4 net for IPv6-only systems, was: Re: WG
daemon@ATHENA.MIT.EDU (Alain Durand)
Fri Sep 28 18:22:48 2007
Date: Fri, 28 Sep 2007 17:38:42 -0400
From: Alain Durand <alain_durand@cable.comcast.com>
To: Iljitsch van Beijnum <iljitsch@muada.com>
CC: Jari Arkko <jari.arkko@piuha.net>, Randy Bush <randy@psg.com>,
<nanog@nanog.org>
In-Reply-To: <5576B501-CFB4-400A-9A0E-4C13A5B54B3E@muada.com>
Errors-To: owner-nanog@merit.edu
On 10/21/07 5:13 PM, "Iljitsch van Beijnum" <iljitsch@muada.com> wrote:
>
>
> I think an approach where you have a regular IPv4 NAT and then tunnel
> the RFC 1918 addresses over an IPv6-only network would work better
> than NAT-PT.
The issue here is that the translation would have to occur at the box that
is decapsulating the packet, as the mapping private-v4 to v4 would have to
be indexed by some kind of tunnel ID that identifies the customer.
If you translate v4 to v6 at the home gateway, you have a global v6 address
to identify that customer and you can do the reverse translation (back to
v4) pretty much anywhere you want in the service provider network.
- Alain.
