Creating smaller routing tables makes the routing table lookup process more efficient, because there are fewer routes to search. If one static route can be used instead of multiple static routes, the size of the routing table is reduced. In many cases, a single static route can be used to represent dozens, hundreds, or even thousands of routes.
Summary CIDR routes can be configured using static routes. This helps to reduce the size of routing tables.
In Figure 1, R1 has been configured to reach the identified networks in the topology. Although acceptable, it would be more efficient to configure a summary static route.
Figure 2 provides a solution using CIDR summarization. The six static route entries could be reduced to 172.16.0.0/13 entry. The example removes the six static route entries and replaces them with a summary static route.