It is interesting because currently the built-in Apple VPN client in both, OS X and iOS, does not support IKEv2. Well, iOS 8 has support for it but not through the GUI. OS X only supports L2TP&#x2F;IPsec and Cisco IPsec (both IKEv1). Cisco IPsec is just plain IPsec, using IKE(v1) to establish the tunnel.