You are redesigning an OSPF network that currently uses RFC 1918 Class A address space to optimize its convergence time. The entire network consists of point-to-point interfaces between routers…

CEF entry allocation is a forwarding plane concern - while summarization does reduce FIB table entries, optimizing CEF is not the primary motivation for summarization in an OSPF convergence improvement initiative.

Reducing RIB entries is a secondary benefit of summarization, but the more impactful and OSPF-specific reason is reducing the LSDB size and the computational cost of the Dijkstra SPF algorithm.

OSPF neighbor relationships are determined by interface type and network topology, not by route summarization - summarization has no effect on the number of adjacencies or hello/dead timers.

OSPF summarization at area boundaries reduces the number of Type 3 Summary LSAs flooded between areas, directly shrinking the LSDB on every router in the network. A smaller LSDB means less memory consumption and faster SPF recalculations, which directly addresses the goal of optimizing convergence time.