A service provider runs MPLS L3VPN with OSPF as the PE-CE routing protocol for customer ACME. Routes learned from a remote CE via MP-BGP are redistributed back into OSPF on the local PE toward the CE. The customer complains that these VPN routes appear on their CE routers as OSPF external Type 5 (E2) LSAs, but they require the routes to be seen as inter-area (Type 3) summary LSAs so that internal SPF metric behavior is preserved end-to-end. Both customer sites use the same OSPF process and are in different, non-zero areas connected through the MPLS backbone. What must be configured on the PEs to achieve this?