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

Inter-AS MPLS VPN Option B is a widely used method for enabling secure and scalable MPLS VPN connectivity between different Autonomous Systems (ASes). Unlike Option A, which requires VRF-to-VRF peering, Option B allows for the exchange of VPN labels via MP-eBGP between ASBRs, reducing operational complexity.

With this approach, service providers can establish direct BGP sessions between ASBRs to advertise labeled VPN routes while keeping the MPLS forwarding plane intact. This method offers better scalability, reduced configuration overhead, and improved routing efficiency compared to Option A.

However, since ASBRs must store and manage customer VPN routes, careful route filtering and policy controls are required to maintain security and optimal performance in multi-provider networks.

You might also be interested in these labs:

• CCIE SP - IS-IS - Initial + Full Configs
• CCIE SP - BGP Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN - All Inter-AS Options - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN - Carrier Supporting Carrier Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option D Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option C Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option B Lab - Initial + Full Configs
• CCIE SP MPLS Lab 2 - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option A Lab - Initial + Full Configs
• CCIE SP - H-VPLS - Initial + Full Configs
• CCIE SP - VXLAN - MPLS - EVPN - Initial + Full Configs