To continue with DMVPN topic, this post will be explaining DMVPN Phase-2. The main difference between Phase-1 and 2 is the spoke to spoke reachability. As shown in the previous post, a spoke can only reach another spoke through the Hub. There is no direct spoke to spoke communication. Phase-2, however, changes this behavior where spokes can talk to each other directly. I'm going to use the same topology and IP addressing. So let's go directly to the actual configuration. DMVPN Phase-2: Static Mapping R1: interface Tunnel0 ip address 10.1.1.1 255.255.255.0 ip nhrp map 10.1.1.2 192.168.1.2 ip nhrp map 10.1.1.3 192.168.1.3 ip nhrp map 10.1.1.4 192.168.1.4 ip nhrp network-id 111 tunnel source FastEthernet0/0 tunnel mode gre multipoint R2: interface Tunnel0 ip address 10.1.1.2 255.255.255.0 no ip