Re: IPv6 RA vs DHCPv6 - The chosen one?

[TJ <trejrco () gmail com>]

I  think perhaps you are confusing "what must be supported by
implementations" (and ignoring the text describing the requirements) as
stated in 6434, with operational usage.

For example - SLAAC must be supported by the implementations, but an
environment isn't required to use it.

/TJ
On Dec 24, 2011 7:34 PM, "Masataka Ohta" <mohta () necom830 hpcl titech ac jp>
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].
>
> 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