CCIE SP - Inter-AS MPLS VPN Option D Lab - Initial + Full Configs

Inter-AS MPLS VPN Option D is an advanced approach designed to overcome the limitations of traditional Options A, B, and C, offering a BGP-free core while maintaining end-to-end MPLS label switching. Instead of relying on BGP for label exchange at AS boundaries, Option D leverages Segment Routing (SR) or RSVP-TE to achieve seamless inter-AS VPN connectivity.

This method enhances scalability, reduces control plane complexity, and improves convergence times. Ideal for large-scale ISPs and global service providers, Option D ensures efficient VPN transport across multiple AS domains while maintaining strict traffic engineering and QoS policies.

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