Using Directory Proxy Server

Sun Java System Directory Proxy Server (formerly Sun ONE Directory Proxy Server) provides many proxy type features. One of these features is LDAP load balancing. Though Directory Proxy Server might not perform as well as dedicated load balancers, consider using it for failover, referral following, security, and mapping features.

See the Directory Proxy Server documentation for more information:

http://docs.sun.com/coll/1317.3