Build a VPN Across Your IP Network with Multi-VRF Feature
One of our customers had to provide end-to-end IP transport across their enterprise network for an outsourced video surveillance solution. We implemented a true VPN solution for them (the hosts in the enterprise network cannot access the surveillance equipment and vice versa) using the Multi-VRF feature available in all recent Cisco IOS releases.
I described the solution Add a VPN to an Enterprise Network with Multi-VRF Functionality article; you’ll find it somewhere in this list.