Re: [DNA] Comments on draft-shim-dna-proactive-00.txt

[Bernard Aboba <aboba@internaut.com>]

> And please note that the CARD protocol can deliver information required for
> IP configuration such as the network prefix. So if the new AP belongs to a
> different subnet, the information previously delivered by the CARD protocol
> can help expediate the IP configuration after handoff. It can do more than
> just telling whether the new AP belongs to the same subnet as the old AP.

As you noted above the SSID is not uniquely tied to the prefix.  For
example, within a single SSID, associated Stations may have different
prefixes.  So an advertisement of an SSID <-> prefix mapping is only a
hint.