Customer virtual context On a Cisco VPN 5000 Concentrator, a CVC comprises a virtual router that "knows" only about its own network A CVC identifies the routing and VPN features for a particular customer, while the Main CVC defines the basic functioning of the system, including a list of the other CVCs The VPN 5000 concentrators can contain multiple CVCs that allow the concentrator to serve the needs of many customers without compromising the security of customer networks There is one CVC per customer