On 2011-08-21 19:02, SM wrote:
> Hi Brian,

...
> IPv6 node requirements are defined in RFC 4294.  It's merely an
> informative reference in draft-ietf-intarea-ipv6-required-01.  The
> discussion about IPV4 address pool exhaustion (Section 1) is a
> distraction from a definition of an IP-capable node.  If the intention
> is to push for IPv6 support in all nodes so that an IP node is
> ubiquitous with IPv4 and IPv6, it would be helpful to have a clear and
> concise document about that.  I do not view concise as saying "MUST
> support IPv6" and be done with it.  The document would state which
> technical specifications an IP-capable mode must support.

That is the role of draft-ietf-6man-node-req-bis (which, if
approved, will obsolete RFC 4294). There are practical reasons
why both of these documents are Informational, and thefore would
require special arguments to be cited normatively.

   Brian
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