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This draft is a work item of the Layer 3 Virtual Private Networks Working Group of the IETF.
Title : Using BGP as an Auto-Discovery Mechanism for Layer-3 and Layer-2 VPNs
Author(s) : H. Ould-Brahim, et al.
Filename : draft-ietf-l3vpn-bgpvpn-auto-05.txt
Pages : 22
Date : 2005-2-23
In any Layer-3 and Layer-2 VPN scheme, the Provider Edge (PE)
devices attached to a common VPN must exchange certain information
as a prerequisite to establish VPN-specific connectivity. The
purpose of this draft is to define a BGP based auto-discovery
mechanism for layer-2 VPN architectures and Virtual router-based
layer-3 VPNs [VPN-VR]. This mechanism is based on the approach used
by BGP/MPLS-IP-VPN [BGP/MPLS-IP-VPN] for distributing VPN routing
information within the service provider(s). In the context of
L2VPNs, an auto-discovery mechanism enables a PE to determine the
set of other PEs having VPN members in common along with information
relative to each specific L2VPN endpoints such as attachment circuit
identifier, topology information, etc. Each VPN scheme uses the
mechanism to automatically discover the information needed by that
particular scheme.
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