Re: IPv6 RA vs DHCPv6 - The chosen one?

[Owen DeLong <owen () delong com>]

On Dec 24, 2011, at 4:36 PM, Masataka Ohta wrote:

> 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].

These do not conflict.

> and a reasonable interpretation is SLAAC MUST be supported if
> ND is supported.

The implementation of IPv6 in a host MUST support SLAAC. That does not mean
that the host must use that support in any particular environment.

Owen