Hi Thomas, 

> -----Original Message-----
> From: ipv6-boun...@ietf.org [mailto:ipv6-boun...@ietf.org] On 
> Behalf Of Thomas Narten
> Sent: Monday, May 23, 2011 1:11 PM
> To: Brzozowski, John
> Cc: ipv6@ietf.org; Bob Hinden
> Subject: Re: Node Requirements: Elevating DHCPv6 from MAY to SHOULD
> 
> > Is the intention for the new text to relax the requirement for
> > auto-configuration?
> 
> No. SLAAC remains a MUST. DHCPv6 though is now a SHOULD.
> 
> For one thing, DHCP doesn't have an option configure on-link prefixes,
> so we still need SLAAC.

Not all links will necessarily require on-link prefixes. For
those, DHCPv6 alone may be sufficient.

Thanks - Fred
fred.l.temp...@boeing.com

> What we should have done oh-so-long-ago is ensure that you could
> configure/operate a network with just DHCP (and no SLAAC at all) and
> vice versa, and than made both a MUST on hosts.  That way, operators
> truly have the choice as to which to use and everything would just
> work.
> 
> Thomas
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