I am configuring the DUAL HUB Dual Cloud DMVPN topology using ospf. we have one L2 link and one L3 link at each hub and each brach router have two L2 links and two L3 links for redundancy to achieve HA.
Attached is the configuration of Hubs and a spoke router, the problem i am facing is that
1>The ospf in DMVPN cloud flaps every time the dead timer expires.
2>When the primary Hub is shut down the job is overtaken by secondary hub but when primary hub comes back, the ospf in primary hub does not establish immediately(take long time even an hour).