cnPilot with Aruba Clearpass as Radius Server

FYI

L2GRE is not supported in Mikrotik because Mikrotik didn't use open standard GRE.

This statement said by Mikrotik Forum Guru and I test myself.

So for L2GRE, cambium way is to connect to cnMaestro as proxy

http://community.cambiumnetworks.com/t5/cnMaestro/cnMaestro-GRE-Tunnel-Configuration-amp-Debugging/m-p/75493

http://community.cambiumnetworks.com/t5/cnPilot-E-Series-Enterprise-APs/Layer-2-Generic-Routing-Encapsulation-L2GRE-softGRE-support-on/td-p/63514
https://community.cambiumnetworks.com/t5/cnMaestro/Feature-Overview-L2GRE-EoGRE-Tunnel-Concentrator-on-cnMaestro/td-p/68379