configuration of spoke
interface Loopback1 ip address 44.44.44.44 255.255.255.0!interface Tunnel0 ip address 10.50.50.2 255.255.255.0 no ip redirects ip mtu 1440 ip nhrp authentication DMVPN-W ip nhrp map multicast dynamic ip nhrp map 10.50.50.1 87....