Hi Mohammed,   I don't see any problems with this as long as STP is forwarding and you have routing setup between switches 1 and 2.    You might need to take captures to see where the packets are actually dropping here. 

Hi Mohammed,   And you have OSPF running over that backup link?   system nve infra-vlans configures a VLAN as one that can pass VXLAN encapsulated packets. So if your uplink goes down, encapped packets would have to go over this SVI instead and there...

Hi Matthew,   Have you verified that BGP is in fact losing the route when you would expect it to and it is redistribution that is failing?   I would monitor the BGP table and OSPF DB on the DMVPN hub when a spoke route is lost to see what is happenin...

Hi Mohammed,   Do you have any backup routing configured between Leaves 3 and 4?   Leaf 4 needs to have a route to Leaves 1 & 2 if it's spine links go down.   It looks like you're using OSPF as your underlay so you should have an SVI across the peer-...

If that port isn't actually connected then you probably have nothing to worry about and might be hitting this bug: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCtk97309 If that port is connected, you likely have a L1 issue of either bad cable or ...