MPLS VPN Technology Categorizing VPNs
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
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.
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.
Central Services Extranet:Hybrid (Overlay + Peer-to-Peer) Implementation
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.