If you are studying for CCIE Security v4 Lab Exam or written for that matter, you need to brush up your skills & learn to test & deploy FlexVPNs. Not only in Lab studies, in production enviroment, FlexVPN is the cisco’s way of integrating all major VPNs into one Umbrella i.e FlexVPN or Unified Overlay VPN
FlexVPN is a way to combine multiple frameworks (crypto maps, ezvpn, DMVPN) into single, comprehensible set of CLI and bind it together with something offering more flexibility and means to extend functionality in future.
FlexVPN is Cisco’s implementation of the IKEv2 standard featuring a unified paradigm and CLI that combines site to site, remote access, hub and spoke topologies and partial meshes (spoke to spoke direct).FlexVPN offers a simple but modular framework that extensively uses the tunnel interface paradigm while remaining compatible with legacy VPN implementations using crypto maps. Read more about An overview of FlexVPN »