While you are playing with this, be aware that even if you do not do DHCP snooping on
the ciscos there is another feature called "ip device tracking" which will build essentially
an IP user table from snooped IP traffic. That will drop the IP address into RADIUS accounting
even for static hosts. Never tried it but I think they might support accounting without auth.
We currently don't use Airwave for wired other than the hospitality ports on APs, even on Aruba
switches, so I can't guarantee that will be useful, but it might be worth a try. Full-network visibility
is more an authentication-server thing for us.