[147891] in North American Network Operators' Group
Re: IPv6 RA vs DHCPv6 - The chosen one?
daemon@ATHENA.MIT.EDU (Masataka Ohta)
Sat Dec 24 19:35:03 2011
Date: Sun, 25 Dec 2011 09:36:41 +0900
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
To: Joel jaeggli <joelja@bogus.com>
In-Reply-To: <4EF66348.8040500@bogus.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Joel jaeggli wrote:
>> First of all, ND use is optional and, if ND is used, RA
>> must be used.
>>
>> It means that, if RA is not used, ND can't be used.
>
> Finding and maintaining the l2 address for a device on a subnet where RA
> is not used is a pretty common activity so I'm not sure how your would
> conclude that. 2461/4861/5942 certainly don't preclude that.
RFC6434 has contradictory statements:
Neighbor Discovery SHOULD be supported.
and
Hosts MUST support IPv6 Stateless Address Autoconfiguration as
defined in [RFC4862].
and a reasonable interpretation is SLAAC MUST be supported if
ND is supported.
Or, we shouldn't expect IPv6 specifications reasonable,
which means reasonable operation is impossible.
Masataka Ohta
