We're planning to migrate our students connecting to eduroam from IPv4 to NAT and plan to use Radius VSA and named vlan pools to assign role/vlan. I haven't begun creating the NAT subnets yet and have an opportunity to increase the subnet size from the /22's we currently use for IPv4. Is anyone using uber-large subnets, say /21, /20, /18, larger?
Any issues to watch for with a larger subnet size? We're currently dropping broadcast/multicast. Running AOS 6.3.1.16. Infoblox for DHCP/DNS.
Thanks,
Mike