crypto isakmp policy 1 encryption aes hash sha group 2 exit crypto isakmp peer address <Main Office Public Internet Static IP Address>
pre-shared-key <secret key> isakmp-policy 1 exit crypto isakmp peer address <First Branch Office Public Internet Static IP Address>
pre-shared-key <secret key 2> isakmp-policy 1 exit crypto ipsec transform-set ts1 esp-3des esp-sha-hmac set pfs 2 exit crypto map 1 set peer <Main Office Public Internet Static IP Address> set transform-set ts1 exit crypto map 2 set peer <First Branch Office Public Internet Static IP Address> set transform-set ts1 exit ip crypto-list 901 local-address <Branch Office Public Internet Static IP Address> ip-rule 1