Re: [v6ops] M/O flags and PD

["Templin, Fred L" <[e-mail]>]

Hi Gert,

> -----Original Message-----
> From: v6ops [mailto:[e-mail]] On Behalf Of Gert Doering
> Sent: Friday, October 30, 2015 2:07 AM
> To: Tore Anderson
> Cc: [e-mail]; [e-mail]
> Subject: Re: [v6ops] M/O flags and PD
> 
> Hi,
> 
> On Fri, Oct 30, 2015 at 09:55:38AM +0100, Tore Anderson wrote:
> > * Gert Doering <[e-mail]>
> >
> > > Yes, but that is the point - "typical routers" do not need to
> > > *listen* to RAs, because that's not required for their job.  They
> > > will speak a routing protocol, and not default-route, etc.
> >
> > Who is listening for RAs or not seems to me to be besides the point. It
> > boils down to this: If you are about to originate an RA to a link, and
> > know that there is information available in DHCPv6 on said link, you
> > should set set the M or O flag. Otherwise you're supplying false
> > information by indicating that there is no information available in
> > DHCPv6.
> 
> No, the point I was trying to made is: conceptually, DHCPv6 PD is happening
> outside RA.  RA is "information to hosts", PD is "done by routers".
> 
> But I already agreed that this is not written down anywhere, but my
> interpretation on how this can all make sense.
> 
> [..]
> > > As I said, boundaries between "hosts" and "router" are less than clear
> > > today - but this is my interpretation on how these have come into place.
> >
> > Indeed. Thus I believe claims like <hosts don't request prefixes> or
> > <routers don't process RAs> can't be considered true (unless a node can
> > be both simultaneously).
> 
> We had this discussion in the context of the CPE spec - a CPE is a
> router (obviously), but for acquiring its management IPv6 address and
> for being talked to on the management address, it's very obviously a
> host as well.  So of course a node can be both.

Right, and it is fine for a host to act as a requesting router from the
standpoint of DHCPv6 PD but then use the delegated prefix for its
own multi-addressing purposes rather than to provision addresses
for other hosts.

Thanks - Fred
[e-mail]

> Gert Doering
>         -- NetMaster
> --
> have you enabled IPv6 on something today...?
> 
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