Each Services Router can support types of interfaces that perform different functions. The router uses network interfaces to transmit and receive network traffic. For network interfaces to operate, you must configure properties such as logical interfaces, the encapsulation type, and certain settings specific to the interface type.
In addition to network interfaces, Services Routers use permanent interfaces for internal communication, such as the services interfaces that provide additional features for regulating and manipulating traffic. For information about one of these interfaces, see the J-series Services Router Getting Started Guide.
This chapter includes the following topics. For more information about interfaces, see the JUNOS Network Interfaces and Class of Service Configuration Guide.