1. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-1 MPLS VPN Technology Categorizing VPNs

2. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-2 Outline Overview What Are the Business Categories for VPNs? What Are Extranet VPNs? What Are the Connectivity Categories for VPNs? What Is the Central Services Extranet? What Is a Managed Network Implementation? Summary

3. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-3 VPN Business Category VPNs can be categorized based on the business needs that they fulfill: Intranet VPNs connect sites within an organization. Extranet VPNs connect different organizations in a secure way. Access VPNs (VPDNs) provides dialup access into a customer network.

4. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-4 Extranet VPNs: Overlay VPN Implementation

5. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-5 Extranet VPNs: Peer-to-Peer VPN Implementation

6. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-6 VPN Connectivity Category VPNs can also be categorized according to the connectivity required between sites: Simple VPN: Every site can communicate with every other site. Overlapping VPNs: Some sites participate in more than one simple VPN. Central services VPN: All sites can communicate with central servers but not with each other. Managed network: A dedicated VPN is established to manage CE routers.

7. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-7 Central Services Extranet

8. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-8 Managed Network Overlay VPN Implementation

9. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-9 Central Services Extranet: Hybrid (Overlay + Peer-to-Peer) Implementation

10. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-10 Summary There are three VPN business categories: intranet VPN, extranet VPN, and access VPN. In an extranet VPN, organizations are linked with dedicated virtual circuits. There are four VPN connectivity categories: simple VPN, overlapping VPN, central service VPN, and managed network. A central services extranet enables customers to access common servers for services. Managed networks allow customer CE devices to be owned and managed by the service provider.

11. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—4-11