Case Study—Multi-Homed Inter-AS Provider Network

Figure 7-38 shows an Inter-AS network topology in which Service Provider 1 and Service Provider 2 are providing MPLS VPN services to geographically dispersed Customer A and B sites.

Figure 7-38. Multi-Homed Inter-AS Provider Network

The provider network uses the RR method to reduce iBGP mesh. P1-AS1-RR and P1-AS2-RR serve as both an ASBR and a RR in the provider network. In this case study, ASBR1-AS1 and ASBR2-AS2 in the provider network use the Inter-AS redistribute connected option to distribute the next hop to devices in Provider Network 1, while P1-AS1-RR and P1-AS2-RR ...

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