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This draft is a work item of the Layer 3 Virtual Private Networks Working Group of the IETF.
Title : Network based IP VPN Architecture using Virtual Routers
Author(s) : P. Knight, H. Ould-Brahim, B. Gleeson
Filename : draft-ietf-l3vpn-vpn-vr-01.txt
Pages : 22
Date : 2003-9-25
This draft describes a network-based Virtual Private Network (VPN)
architecture using the virtual router (VR) concept. Multiple VRs can
exist in a single physical device. A VR emulates all the
functionality of a physical router, and therefore inherits all
existing mechanisms and tools for configuration, operation,
accounting, and maintenance. Any routing protocol can be used to
distribute VPN reachability information among VRs, and no VPN-
related modifications or extensions are needed to the routing
protocol for achieving VPN reachability. Direct VR-to-VR
connectivity may be configured through layer-2 links or through IP-
or MPLS-based tunnels. Traffic from VRs belonging to different VPNs
may be aggregated over a 'backbone VR' network, which greatly
simplifies VPN provisioning. This architecture accommodates various
backbone deployment scenarios, both where the VPN service provider
owns the backbone, and where the VPN service provider obtains
backbone service from one or more other service providers.
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