Re: [v6ops] A common problem with SLAAC in "renumbering" scenarios

[Jen Linkova <[e-mail]>]

On Thu, Jan 31, 2019 at 11:12 PM Fernando Gont <[e-mail]> wrote:
> > When the new prefix is received it'll most likely have a higher
> > preferred and valid lifetime, so hosts should use the new prefix just by
> > means of them preferring the higher preferred lifetime of that PIO. So
> > the problem is a bit less than you write in the draft.
>
> Nothing in the spec says preference is related to the "Preferred
> Lifetime" timer. i.e., an address is preferred, or it is not...

I tried to address this problem before (and there are more use cases
than just CPE reboot):
https://tools.ietf.org/html/draft-linkova-6man-default-addr-selection-update-00

I might be biased here indeed but I think that using the "most
recently updated" (however we define that) address would be the
simpler solution than
deprecating the whole prefix (and both solution requires hosts to keep
the PIO <> advertising router mapping).

-- 
SY, Jen Linkova aka Furry