I am looking for a way to set up a full DMVPN mesh with redundant hubs so that NHRP doesn't completely fail if 1 hub goes down.
I have tried to look this up online but my issue is that everyone seems to configure a second mesh with another hub router. The problem with this topology is that the second hub is now not a part of the primary DMVPN mesh and does not have access to the primary hubs LAN unless it is on the same site.
I would like to have the backup hub at a different site to avoid paying for a redundant hub router that won't be used unless the primary goes down.
I have tried creating a second tunnel interface on each hub to connect to the corresponding primary and backup DMVPN mesh, but that has not worked. Does anyone have any ideas?