An administrator is establishing a new site-to-site VPN connection on a Cisco IOS router.

Explanation

The command “crypto isakmp identity address 172.19.20.24” is not valid. We can only use “crypto isakmp

identity {address | hostname}. The following example uses preshared keys at two peers and sets both their

ISAKMP identities to the IP address.

At the local peer (at 10.0.0.1) the ISAKMP identity is set and the preshared key is specified:

crypto isakmp identity address

crypto isakmp key sharedkeystring address 192.168.1.33

At the remote peer (at 192.168.1.33) the ISAKMP identity is set and the same preshared key is specified:

crypto isakmp identity address

crypto isakmp key sharedkeystring address 10.0.0.1