When designing a large full mesh network running OSPF, how would you reduce LSA repetition?

DR and BDR election applies only to broadcast and NBMA multi-access network segments, not to full-mesh topologies built from individual point-to-point links where each interface forms a direct adjacency without DR involvement.

ACLs cannot selectively filter OSPF LSAs because OSPF uses IP protocol 89 directly and LSAs are not distinguishable by ACL criteria; applying ACLs would break OSPF neighbor relationships entirely.

When one or two routers are designated to re-flood LSAs rather than having every router re-flood to every neighbor, the total number of LSA copies traversing the network is dramatically reduced. This mirrors the principle behind OSPF flooding reduction (RFC 4136), where selective re-flooding by specific routers prevents exponential LSA repetition in densely connected topologies.

Placing each point-to-point link in a separate OSPF area multiplies inter-area overhead and ABR processing, increasing complexity rather than reducing LSA repetition within the network.