Case Study—Inter-AS Implementing Route-Reflector and BGP Confederation in Provider Networks
Figure 7-37 shows an Inter-AS network topology in which SP1 and SP2 are providing MPLS VPN services to geographically dispersed Customer A and Customer B sites.
Provider 1 uses the RR method to reduce iBGP mesh while Provider 2 uses BGP confederation to minimize the number of BGP sessions. ASBR2-AS1 in the provider network uses the Inter-AS redistribute connected option to distribute the next-hop to devices in Provider Network 1, while ASBR2-AS2 uses the Inter-AS ...
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