Dmvpn Configuration steps

Experiment topology diagram:

1.IP address configuration

2. Configure the default route to the ISP on R1, R3, R4 (that is, to R2)

R1:ip Route 0.0.0.0 0.0.0.0 172.16.12.2

R2:ip Route 0.0.0.0 0.0.0.0 172.16.23.2

R3:ip Route 0.0.0.0 0.0.0.0 172.16.24.2

3. Tunnel port and NhRP on R1, R3 and R4

R1:

int Tunnel 0

IP Add 192.168.1.1 255.255.255.0

Tunnel Source f0/0

Tunnel mode GRE multipoint

Tunnel Key 99

IP NHRP Authentication cisco123

IP NHRP network-id 999

IP NHRP Map Multicast dynamic

R3:

int Tunnel 0

IP Add 192.168.1.3 255.255.255.0

Tunnel Source f0/0

Tunnel mode GRE multipoint

Tunnel Key 99

IP NHRP Authentication cisco123

IP NHRP network-id 999

IP NhRP NHS 192.168.1.1

IP NHRP Map Multicast 172.16.12.1

IP nhrp Map 192.168.1.1 172.16.12.1

R4:

int Tunnel 0

IP Add 192.168.1.4 255.255.255.0

Tunnel Source f2/0

Tunnel mode GRE multipoint

Tunnel Key 99

IP NHRP Authentication cisco123

IP NHRP network-id 999

IP NhRP NHS 192.168.1.1

IP NHRP Map Multicast 172.16.12.1

IP nhrp Map 192.168.1.1 172.16.12.1