This configuration is used with “Introduction to the Cisco 5921 Embedded Services Router v1” in dCloud.
Cisco dCloud lab - CONFIGURING SITE TO SITE IPSEC VPN TUNNEL BETWEEN CISCO ROUTERS - c5921_ubuntu32_2
Derived from:
http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/867-cisco-router-site-to-site-ipsec-vpn.html