You can configure the DHCP local server to operate in either equal-access mode or standalone mode.
In standalone mode, the DHCP local server provides a basic DHCP service. The server receives a client request for an IP address and immediately allocates the subscriber an IP address from one of the local address pools.
In equal-access mode, the DHCP local server works with Juniper Networks Session and Resource Control (SRC) software and the authorization, accounting, and address assignment utility to provide an advanced subscriber configuration and management service. After the subscriber is authenticated through RADIUS, the DHCP server assigns the subscriber an IP address with a long lease time. This assignment of an IP address triggers the creation of dynamic subscriber interfaces.
For more information about the DHCP servers and the SRC software, see the following chapters: