[102302] in North American Network Operators' Group
Re: Aggregation for IPv4-compatible IPv6 address space
daemon@ATHENA.MIT.EDU (Joe Abley)
Mon Feb 4 12:15:03 2008
Cc: "'snort bsd'" <snortbsd@yahoo.com.au>, <nanog@merit.edu>
From: Joe Abley <jabley@ca.afilias.info>
To: <swm@emanon.com>
In-Reply-To: <034901c866ed$95f060a0$07011eac@CCIEJNCIE>
Date: Mon, 4 Feb 2008 12:10:45 -0500
Errors-To: owner-nanog@merit.edu
On 4-Feb-2008, at 00:19, Scott Morris wrote:
> You mean do you have to express it in hex?
There are two related things here: (a) the ability to represent a 32-
bit word in an IPv6 address in the form of a dotted-quad, and (b) the
legitimacy of an IPv6 address of the form ::A.B.C.D, where A.B.C.D is
an IPv4 address.
(a) is a question about the presentation of IPv6 addresses. (b) is a
question about the construction of IPv6 addresses to be used in packet
headers.
I believe (a) is still allowed. However, (b) is not allowed. Since (b)
is not allowed, (a) is arguably not very useful.
Joe
