I added a new spoke. For some reason, I'm getting stuck with the NHRP State (show dmvpn)
Spoke2 Tunnel Configuration:
interface Tunnel0
description mGRE - DMVPN Tunnel
bandwidth 10000
ip address 172.16.0.2 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication cisco
ip nhrp map multicast <Hub Public IP>
ip nhrp map 172.16.0.1 <Hub Public IP>
ip nhrp network-id 100
ip nhrp holdtime 300
ip nhrp nhs 172.16.0.1
ip tcp adjust-mss 1360
tunnel source GigabitEthernet0/0/0
tunnel mode gre multipoint