I am new to DMVPN and is in the process planning for a small (50 spoke) trial setup.
We plan to have two hub routers in two different cities. At this point, my focus is the redundancy instead of load sharing among them.
My understanding is I can achieve redundancy by:
(option-A) Single DMVPN network with two HUB in it, and do NHRP
(option-B) Two DMVPN networks each with one HUB, and use EIGRP (matrix) so traffic route to backup HUB when primary HUB is gone.
Am I thinking right? If so, what are the decision factors I should consider between these two options?