The following figure shows the inter-AS MPLS L3VPN Option C (solution 2). ASBR-PE2 is connected to CE3 and runs EBGP. To enable all CEs to communicate with each other, in which of the following address families must peer relationships be enabled in the BGP process of ASBR-PE2? (Choose all that apply.)
To ensure all CE devices can communicate with each other in an MPLS L3VPN Option C setup, the ASBR-PE2 must establish peer relationships in the BGP process for both the VPNv4 address family and the Unicast BGP address family. The VPNv4 address family is required to support MPLS L3VPNs, which encapsulate customer routes with MPLS labels and export/import these routes across AS boundaries. The Unicast BGP address family is necessary to handle regular IP routing and allows the ASBRs to exchange routing information for both MPLS labels and traditional IP routes, ensuring end-to-end connectivity between the CEs.
B. Unicast BGP address family, with route-policy to apply label
VPNV4 BGP