IPv6 RA vs DHCPv6 - The chosen one?

TJ trejrco at gmail.com
Sun Dec 25 14:52:42 UTC 2011

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.

On Dec 24, 2011 7:34 PM, "Masataka Ohta" <mohta at necom830.hpcl.titech.ac.jp>

> 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

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