Chapter 6. Interfaces and Class of Service

JUNOS Interface Terminology

Configuring Interfaces on the Router

Configuring ATM Interfaces

Configuring E1 and E3 Interfaces

Configuring Encryption Interfaces

Configuring Ethernet Interfaces

Configuring Frame Relay

Configuring the Loopback Interface

Configuring Multilink Interfaces

Configuring SONET/SDH Interfaces

Configuring T1 and T3 Interfaces

Configuring Tunnel Interfaces

Configuring Channelized Interfaces

Configuring Class of Service (CoS)

Routers typically contain several types of interfaces suited to various functions. For the interfaces on a router to function, you must configure them, specifying properties such as the interface location (that is, which slot the FPC is installed in and which location on the FPC the PIC is installed in), the interface type (such as SONET or ATM), encapsulation, and interface-specific properties.

You can configure the interfaces that are currently present in the router, and you can also configure interfaces that you might be adding in the future. When the hardware corresponding to a configured interface is installed in the router, the JUNOS software detects its presence and applies the appropriate configuration to it.