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Re: Simplified NAT-PT
- To: Hiroshi MIYATA <miyata@tahi.org>
- Subject: Re: Simplified NAT-PT
- From: Brian E Carpenter <brian.e.carpenter@gmail.com>
- Date: Thu, 07 Feb 2008 15:05:02 +1300
- Cc: IPv6 Operations <v6ops@ops.ietf.org>
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Miyata-san,
I haven't completely studied this yet, but I have two
quick comments.
> The prefix PREFIX::/96 is advertised in the IPv6 network by the
> NAT-PT gateway, and packets addressed to this PREFIX will be routed
> to the NAT-PT gateway. The pre-configured PREFIX only needs to be
> routable within the IPv6 network and as such it can be any routable
> prefix that the network administrator chooses.
This seems to assume that the NAT-PT is at the boundary between
a closed IPv6 routing realm (where it's OK to advertise a /96)
and the IPv4 network. What happens if someone needs to put
a NAT-PT between a closed IPv4 routing realm and the open
IPv6 network?
>
> The following 32-bit, represented as IDENT MUST be an value assigned
> by IANA to indicate that translator would exist in the path.
> More requirement for IDENT is described in Chapter 13.
Why is this useful?
Brian