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Title : Maintaining IGP transparency of VPN routes when BGP is used as a PE-CE protocol
Author(s) : S. Mirtorabi, et al.
Filename : draft-mirtorabi-l3vpn-igp-transparency-00.txt
Pages : 8
Date : 2007-4-13
Many Service Providers offer Virtual Private Network (VPN) services
to their customers, using a technique in which customer edge routers
(CE routers) are routing peers of provider edge routers (PE routers).
Although specification has been defined allowing OSPF or other IGP to
be used as PE-CE routing protocol, BGP is often used as PE-CE routing
protocol. Section 2 describes some of the motivations to use BGP as
PE-CE routing protocol. The usage of BGP breaks customer route's
transparency when they move from an overlay VPN model to MPLS VPN model.
This document describes the extension to CE in order to keep the customer
routes' transparent when BGP is used as PE-CE routing protocol.
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