A transit authority places two DMVPN hubs on one shared mGRE cloud for hub redundancy across the county WAN. What trade-off does that dual-hub single-cloud design primarily involve?
Select an answer to reveal the explanation.
Short Explanation
Two hubs on one mGRE cloud is two mayors sharing one town square — simpler for spokes, but a square-wide problem hits both. You get hub redundancy without dual tunnel complexity, yet you do not isolate failure domains as cleanly as dual clouds. Know that trade-off going in.
Full Explanation
Dual-hub single-cloud DMVPN lets spokes use one tunnel interface/NHS set toward hubs on the same mGRE multipoint network, simplifying spoke configuration while providing hub redundancy. The trade-off is correlated exposure: overlay or NHRP issues in that cloud can impact both hubs. NHRP remains required, and Phase 3 can still operate with dual hubs. Choose single-cloud when operational simplicity outweighs stricter failure-domain isolation.