crypto isakmp policy 1 encryption aes authentication pre-share group 14 ! ! A dynamic ISAKMP key and IPsec profile crypto isakmp key supersecretkey address 0.0.0.0 crypto ipsec transform-set trans2 esp-aes esp-sha-hmac mode transport !
crypto ipsec profile my_hub_vpn_profile set transform-set trans2 ! ! The tunnel interface with NHRP Interface Tunnel0 ip address 10.0.0.1 255.255.255.0 ip nhrp authentication anothersupersecretkey ip nhrp map multicast dynamic ip nhrp network-id 99 ip nhrp holdtime 300 tunnel source GigabitEthernet0/0 tunnel mode gre multipoint ! This line must match on all nodes that want to use this mGRE tunnel. tunnel key 100000 tunnel protection ipsec profile my_hub_vpn_profile
interface GigabitEthernet0/0 ip address 172.16.0.1 255.255.255.0 ! interface GigabitEthernet0/1 ip address 192.168.0.1 255.255.255.0 ! router eigrp 1 network 10.0.0.0 0.0.0.255 network 192.168.0.0 0.0.0.255