DMVPN to FlexVPN migration questions
Hello, if anyone has performed this migration, please share your thoughts on these points.
1. Does FlexVPN solve the latency issue experienced by spoke-to-spoke traffic (specifically, voice packets)? This is an issue with DMVPN's delay in bringing up the spoke-to-spoke IPsec negotiations and P2P tunnel.
2. Do you still need to rely on GetVPN to address the latency issue for Spoke-to-spoke tunnels, or is IKEv2's negotiation phase fast enough for real-time/voice traffic between spokes?
3. For large-scale deployments, can you have the two Hub's in different domain ID's? If so, is it just a matter of "peering" the Hubs so traffic from a spoke in one domain/cloud simply gets rerouted over a GRE tunnel between the Hubs to reach another spoke in the other domain/cloud?
4. Is it possible for the Hubs to use redundant AAA/RADIUS servers instead of only one (as in no redundancy with using the Key Server in GetVPN)?