On Cisco IOS routers, you have three ways to authenticate D-H between peers as shown in the list: R1 (config)# crypto isakmp policy 10 R1 (config-isakmp)# authentication ?
Our earlier IKE policy required the use of preshared keys. To implement preshared keys on R1, we would enter the following command: R1 (config-isakmp)# authentication pre-share |