Document Organization

This manual is divided into several parts. Each part describes a major functional area of the JUNOS software, and the individual chapters within a part describe the software commands of that functional area.

This manual contains the following parts and chapters:

• Preface, About This Manual (this chapter), provides a brief description of the contents and organization of this manual and describes how to contact customer support.
• Part 1, "Overview," provides an overview of how to configure the router's interface and class of service properties:

• Chapter 1, "Interfaces and Class of Service Overview," describes the router's interfaces and tools for processing traffic using class-of-service techniques.
• Chapter 2, "Interfaces and Class of Service Configuration Statements," lists all commands discussed in this manual and provides a visual display of their hierarchy.

• Part 2, "Router Interfaces," includes an overview chapter, chapters that describe physical, logical, and family interface statements and properties, and chapters that describe cross-connects and trace operations:

• Chapter 3, "Interfaces Overview," provides an overview of interfaces, including a description of the interfaces supported by the router and interface naming conventions.
• Chapter 4, "Interfaces Configuration Statements," lists all statements used to configure the interfaces.
• Chapter 5, "Configure Physical Interface Properties," provides a description of the interface statements used at the physical layer.
• Chapter 6, "Configure Logical Interface Properties," describes the process of configuring logical interfaces within a physical interface.
• Chapter 7, "Configure Protocol Family and Address Interface Properties," explains the assignment of a protocol family to an interface.
• Chapter 8, "Configure Circuit and Translational Cross-Connects," explains the use of cross-connect techniques across Layer 2 physical interfaces.
• Chapter 9, "Trace Interface Operations," describes how to trace interface operations.

• Part 3, "Interface Types," includes chapters that describe each interface type and the interfaces' associated statements and properties:

• Chapter 10, "Configure ATM 1 and ATM 2 Interfaces," explains interfaces designed for Asynchronous Transfer Mode encapsulation.
• Chapter 11, "Channelized Interfaces Overview," provides a high-level overview of channelized interfaces, focusing mainly on the capabilities, properties, and structure of Channelized QPP interfaces.
• Chapter 12, "Configure Channelized E1 Interfaces," details the configuration of the original Channelized E1 and Channelized E1 QPP interface types, used outside North America.
• Chapter 13, "Configure Channelized OC-12 Interfaces," details the configuration of the original Channelized OC-12 and Channelized OC-12 QPP interface types.
• Chapter 14, "Configure Channelized STM-1 Interfaces," details the configuration of the original Channelized STM-1 and Channelized STM-1 QPP interface types.
• Chapter 15, "Configure Channelized T3 Interfaces," details the configuration of the original Channelized T3 and Channelized T3 QPP interface types.
• Chapter 16, "Configure Discard Interfaces," details the configuration of the discard interface.
• Chapter 17, "Configure E1 Interfaces," details the configuration of the E1 interface type used outside North America.
• Chapter 18, "Configure E3 Interfaces," details the configuration of the E3 interface type used outside North America.
• Chapter 19, "Configure EIA-530 Interfaces," details the configuration of the EIA-530 interface type.
• Chapter 20, "Configure Encryption Interfaces," details the configuration of tunnel interfaces that use the ES PIC.
• Chapter 21, "Configure Ethernet Interfaces," provides configuration information about the Fast Ethernet and Gigabit Ethernet interface types.
• Chapter 22, "Configure Frame Relay," explains the configuration of Frame Relay interface encapsulation on logical interfaces.
• Chapter 23, "Configure the Loopback Interface," documents the configuration of the loopback interface, and explains how to set loopback addresses.
• Chapter 24, "Configure Multilink and Link Services Interfaces," documents the configuration of multilink and link services interfaces, and describes how to set up links and bundles.
• Chapter 25, "Configure SONET/SDH Interfaces," documents the configuration of the various high-speed fiber-optic interface types.
• Chapter 26, "Configure T1 Interfaces," explains the use of the T1 interface type used in North America.
• Chapter 27, "Configure T3 Interfaces," explains the use of the DS-3 metallic interface type used in North America.
• Chapter 28, "Configure Tunnel Interfaces," explains how to use a Tunnel PIC to set up unicast, multicast, IPv6 over IPv4, and PIM tunnels, and describes how to use a Tunnel PIC for route and VRF table lookups.
• Chapter 29, "Summary of Interface Configuration Statements," provides a detailed listing of all configuration statements used in the Router Interfaces part of the manual.

• Part 4, "CoS," describes how to configure and monitor the JUNOS software to support CoS decision-making:

• Chapter 30, "CoS Overview," introduces the concept of CoS.
• Chapter 31, "CoS Configuration Guidelines," describes how to configure CoS.
• Chapter 32, "Summary of CoS Configuration Statements," provides a detailed listing of all CoS-related configuration statements.

This manual also contains a glossary, a complete index, and an index of statements and commands.