The maximum load-balancing import-rib command sets the maximum number of imported routes that can be used for load balancing when the optimal route is an imported route.
The undo maximum load-balancing import-rib command restores the default maximum number of imported routes that can be used for load balancing when the optimal route is an imported route.
By default, when the optimal route is the imported route, the maximum number of imported routes that can be used for load balancing is 1. That is, load balancing is not performed