In this configuration, you run a slapd(8) instance which provides directory service for your local domain and configure it to return referrals to other servers capable of handling requests. You may run this service (or services) yourself or use one provided to you. This configuration is shown in Figure 3.2.
Figure 3.2: Local service with referrals
Use this configuration if you want to provide local service and participate in the Global Directory, or you want to delegate responsibility for subordinate entries to another server.