crypto isakmp policy 1 encr 3des authentication pre-share group 2 crypto isakmp key Cisco12345 address 0.0.0.0 0.0.0.0 crypto IPsec transform-set T1 esp-3des esp-sha-hmac crypto IPsec profile P1 set transform-set T1 ! interface Tunnel0 ip address 10.0.51.203 255.255.255.0 ip ospf mtu-ignore load-interval 30 tunnel source 10.0.149.203 tunnel destination 10.0.149.217 tunnel mode IPsec ipv4 tunnel protection IPsec profile P1 ! interface Ethernet3/0 ip address 10.0.149.203 255.255.255.0 duplex full ! interface Ethernet3/3 ip address 10.0.35.203 255.255.255.0 duplex full ! ip classless