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I-D ACTION:draft-ouldbrahim-bgpvpn-auto-02.txt



A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: Using BGP as an Auto-Discovery Mechanism for         
                          Network-based VPNs
	Author(s)	: H. Ould-Brahim et al.
	Filename	: draft-ouldbrahim-bgpvpn-auto-02.txt
	Pages		: 10
	Date		: 23-Jul-01
	
In any Network-Based VPN (NBVPN) scheme, the Provider Edge (PE)
routers attached to a common VPN must exchange certain information
as a prerequisite to establish VPN-specific connectivity. In
[RFC2547-bis], VPN-specific routes are exchanged, along with the
information needed to enable a PE to determine which routes belong
to which VPNs. In [VPN-VR], VR addresses must be exchanged, along
with the information needed to enable the PEs to determine which VRs
are in the same VPN ('membership'), and which of those VRs are to
have VPN connectivity ('topology'). Once the VRs are reachable
through the tunnels, routes ('reachability') are then exchanged by
running existing routing protocol per VPN basis. The purpose of this
draft is to define a common BGP based auto-discovery mechanism used
for both the virtual router [VPN-VR] and [RFC2547-bis]
architectures. Each scheme uses the mechanism to automatically
discover the information needed by that particular scheme.
Interworking scenarios between [RFC2547-bis] and the virtual router
models are also discussed.

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