Re: [DNA] [Issue 15] [Issue 16] DAD and MLD Interaction

[James Kempf <kempf@docomolabs-usa.com>]

Hi Brett,

> > 5.2.5.2 DNA and the Address Autoconfiguration State Machine
> >
> > When a link level event occurs indicating that the host has moved from
one
> > link to another, DNA requires the host to determine whether a change in
IP
> > link has occured by sending an RS. The DNA host SHOULD select one of its
>
> We need to keep the terminology consistent (and this goes for the rest
> of the draft too...)  The last discussions on this list that I can find
> (around 26/5/05) talked about "point of attachment" for what you have
> here called "link", and "link" for what you have called "IP link".  I
> think the intention is to have them defined in the "L2 event
> notifications for DNA" document.
>

OK, sorry, I wrote it up quickly and didn't pay much attention to making the
terminology consistent. I'll clean it up once we have discussion complete.

> > If the received RAs indicate that the host has moved to a new IP link
(i.e.
> > the IP link has changed), either because a DNA RA has been received or
> > nonDNA RAs have been received and the host performs CPL, the host MUST
> > transition all autoconfigured addresses in the "Confirmed" state to
> > "Optimistic" and begin optimistic Duplicate Address Detection signaling
for
> > them. Optimistic Duplicate Address Detection signaling for "Optimistic"
> > addresses MUST also be restarted and continued until either a duplicate
is
> > detected or the signaling timeout occurs, according to [RFCoDAD].
>
> This sounds right for link-local addresses, but I think global addresses
> will be invalid because of the link change and should be dropped
> altogether.  New global addresses may be formed based on the prefix
> information in the RA and those should go into the Optimistic state.
>

Right, that makes sense.

            jak