A Service Provider is designing a solution for a managed CE service to a number of local customers using a single CE platform and wants to have logical separation on the CE platform using Virtual…

Static routes for route leaking are used to share prefixes between already-selected VRFs, not to classify incoming packets and assign them to a VRF based on IP range or packet length.

PBR uses route-maps with flexible match statements - matching source or destination IP prefixes, packet length, or protocol - combined with a 'set vrf' action to direct traffic into the appropriate VRF at ingress, providing policy-driven VRF selection that scales to many customers on a single CE platform without per-VRF routing protocol overhead.

OSPF per VRF instance is a routing protocol that distributes reachability information within each VRF; it has no mechanism to inspect arriving packets and make a VRF assignment decision based on packet attributes.

MP-BGP is used between provider PE routers to exchange VPN-IPv4 prefixes for MPLS VPN signaling, and does not perform packet-level VRF selection on a CE device based on IP ranges or packet length.