通过 ISAKMP 方式建立IPsec 隧道采用预共享密钥认证

sys R1
dhcp en
int g0/0/0
int ad 1.1.1.1 24
int g0/0/1
ip ad 2.2.2.1 24
quit

sys R2
dhcp en
int g0/0/0
int ad 1.1.1.2 24
int g0/0/1
ip ad 10.0.0.1 24
dhcp select int
quit
ip route-static 0.0.0.0 0 1.1.1.1

sys R3
dhcp en
int g0/0/0
ip ad 2.2.2.2 24
int g0/0/1
ip ad 192.168.1.1 24
dhcp select int
quit