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URL: http://www.ietf.org/rfc/rfc2547.txt
This
document describes a method by which a Service Provider with an IP backbone may
provide VPNs (Virtual Private Networks) for its customers. MPLS (Multiprotocol
Label Switching) is used for forwarding packets over the backbone,
and BGP (Border Gateway Protocol) is used for distributing routes over the
backbone. The primary goal of this method is to support the outsourcing of IP
backbone services for enterprise networks. It does so in a manner that is
simple for the enterprise, while still scalable and flexible for the Service
Provider, and while allowing the Service Provider to add value. These
techniques can also be used to provide a VPN which itself provides IP service
to customers.
Keywords:
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