VPN GRE tunnel with IPSEC

quick checklist

1) crypto isakmp policy 10

 encr aes 256

 authentication pre-share

 group 2

2) crypto isakmp key cisco address 192.168.3.2 no-xauth

3) crypto ipsec transform-set DEMO esp-aes 256 esp-sha-hmac

4) crypto ipsec profile VPN_PROFILE

set transform-set DEMO 

5)  tunnel int

    ip address 192.168.3.1 255.255.255.0

 tunnel source FastEthernet0/0

 tunnel destination 10.0.0.2

 tunnel mode ipsec ipv4

 tunnel protection ipsec profile VPN_PROFILE