# Subscriber Management Overview

The E Series router enables customers to create a unified subscriber management, provisioning, and service delivery environment. The flexibility of the router provides a variety of methods and configurations that enable customers to dynamically provision new subscribers and quickly create new value-added services.

Two major aspects of subscriber management are subscriber provisioning and differentiated service delivery. The E Series router enables you to use both static and dynamic methods to add and delete subscribers. Important subscriber management concepts provided by JunosE subscriber management include:

- Subscriber use of a shared medium
- Multiple subscribers using the same primary interface
- User authentication and accounting
- Differentiated services for individual subscribers

A subscriber management environment can include the following components:

- Local Dynamic Host Configuration Protocol (DHCP) server
- External DHCP server
- RADIUS server
- Session and Resource Control (SRC) software

You employ the components you need in a variety of configurations, depending on your specific requirements.