One main reason for deploying a directory proxy server is to balance workload across the directory servers available. Load balancing works particularly well for read operations, as each directory server can respond to read operations without impact on other directory servers. Load balancing can also be used in reverse for write operations, as in a replicated environment the results of each write operation must be applied on all directory servers to keep their data in sync. This chapter demonstrates how to configure proxy load balancing of client application traffic.