About This Reference

This preface provides the following guidelines for using the JUNOS Internet Software for J-series, M-series, and T-series Routing Platforms Protocols, Class of Service, and System Basics Command Reference and related Juniper Networks, Inc., technical documents:

• Objectives
• Audience
• Using the Indexes
• Documentation Conventions
• Related Juniper Networks Documentation
• Documentation Feedback
• Requesting Support

Objectives

This reference provides descriptions of the JUNOS Internet software commands that you use to monitor and troubleshoot most aspects of the router. (For additional commands, see the JUNOS Network and Services Interfaces Command Reference.)

NOTE: This reference documents Release 7.2 of the JUNOS Internet software. For additional information about the JUNOS software—either corrections to or information that might have been omitted from this reference—see the software release notes at http://www.juniper.net/.

Audience

This reference is designed for network administrators who are monitoring a Juniper Networks J-series, M-series, or T-series routing platform.

To use this reference, you need a broad understanding of networks in general, the Internet in particular, networking principles, and network configuration. You must also be familiar with one or more of the following Internet routing protocols:

• Border Gateway Protocol (BGP)
• Routing Information Protocol (RIP)
• Intermediate System-to-Intermediate System (IS-IS)
• Open Shortest Path First (OSPF)
• Internet Control Message Protocol (ICMP) router discovery
• Internet Group Management Protocol (IGMP)
• Distance Vector Multicast Routing Protocol (DVMRP)
• Protocol-Independent Multicast (PIM)
• Multiprotocol Label Switching (MPLS)
• Resource Reservation Protocol (RSVP)
• Simple Network Management Protocol (SNMP)

Personnel operating the equipment must be trained and competent; must not conduct themselves in a careless, willfully negligent, or hostile manner; and must abide by the instructions provided by the documentation.

Using the Indexes

This reference contains two indexes: an index of all features and tasks and an index of all commands.

Documentation Conventions

Table 1 defines notice icons used in this reference.

Table 1: Notice Icons

Icon	Meaning	Description
	Informational note	Indicates important features or instructions.
	Caution	Indicates a situation that might result in loss of data or hardware damage.

Table 2 defines the text and syntax conventions used in this reference.

Table 2: Text and Syntax Conventions

Convention	Element	Example
Bold sans serif typeface	Represents text that you type.	To enter configuration mode, type the configure command: user@host> configure
Fixed-width typeface	Represents output on the terminal screen.	user@host> show chassis alarms No alarms currently active
Italic typeface	Introduces important new terms. Identifies book names. Identifies RFC and Internet draft titles.	A policy term is a named structure that defines match conditions and actions. JUNOS System Basics Configuration Guide RFC 1997, BGP Communities Attribute
Italic sans serif typeface	Represents variables (options for which you substitute a value) in commands or configuration statements.	Configure the machine's domain name: [edit] root@# set system domain-name domain-name
Sans serif typeface	Represents names of configuration statements, commands, files, and directories; IP addresses; configuration hierarchy levels; or labels on routing platform components.	To configure a stub area, include the stub statement at the [edit protocols ospf area area-id] hierarchy level. The console port is labeled CONSOLE.
< > (angle brackets)	Enclose optional keywords or variables.	stub <default-metric metric>;
| (pipe symbol)	Indicates a choice between the mutually exclusive keywords or variables on either side of the symbol. The set of choices is often enclosed in parentheses for clarity.	broadcast | multicast (string1 | string2 | string3)
# (pound sign)	Indicates a comment specified on the same line as the configuration statement to which it applies.	rsvp {                                                                       # Required for dynamic MPLS only
[ ] (square brackets)	Enclose a variable for which you can substitute one or more values.	community name members [ community-ids ]
Indention and braces ( { } )	Identify a level in the configuration hierarchy.	[edit] routing-options {        static {            route default {                             nexthop address;                 retain;            }        }  }
; (semicolon)	Identifies a leaf statement at a configuration hierarchy level.
J-Web GUI Conventions
Bold typeface	Represents J-Web graphical user interface (GUI) items you click or select.	In the Logical Interfaces box, select All Interfaces. To cancel the configuration, click Cancel.
> (bold right angle bracket)	Separates levels in a hierarchy of J-Web selections.	In the configuration editor hierarchy, select Protocols>Ospf.

Related Juniper Networks Documentation

Table 3 lists the software and hardware guides and release notes for Juniper Networks J-series, M-series, and T-series routing platforms and describes the contents of each document. Table 4 lists the books included in the Network Operations Guide series.

Table 3: Juniper Networks Technical Documentation

Document	Description
JUNOS Internet Software for J-series, M-series, and T-series Routing Platforms Configuration Guides
Feature Guide	Provides a detailed explanation and configuration examples for several of the most complex features in the JUNOS software.
JUNOS-FIPS Configuration Guide	(M-series and T-series routing platforms only) Provides an overview of JUNOS-FIPS 140-2 concepts and describes how to install and configure the JUNOS-FIPS software. Describes FIPS-related commands and how to configure, authorize, and zeroize the AS II FIPS PIC.
MPLS Applications	Provides an overview of traffic engineering concepts and describes how to configure traffic engineering protocols.
Multicast Protocols	Provides an overview of multicast concepts and describes how to configure multicast routing protocols.
Network Interfaces and Class of Service	Provides an overview of the network interface and class-of-service functions of the JUNOS software and describes how to configure the network interfaces on the routing platform.
Network Management	Provides an overview of network management concepts and describes how to configure various network management features, such as SNMP and accounting options.
Policy Framework	Provides an overview of policy concepts and describes how to configure routing policy, firewall filters, forwarding options, and cflowd.
Routing Protocols	Provides an overview of routing concepts and describes how to configure routing, routing instances, and unicast routing protocols.
Services Interfaces	Provides an overview of the services interfaces functions of the JUNOS software and describes how to configure the services interfaces on the routing platform.
System Basics	Provides an overview of the JUNOS software and describes how to install and upgrade the software. This guide also describes how to configure system management functions and how to configure the chassis, including user accounts, passwords, and redundancy.
VPNs	Provides an overview and describes how to configure Layer 2 and Layer 3 virtual private networks (VPNs), virtual private LAN service (VPLS), and Layer 2 circuits. Provides configuration examples.
JUNOS References
Network and Services Interfaces Command Reference	Describes the JUNOS software operational mode commands you use to monitor and troubleshoot network and services interfaces on Juniper Networks J-series, M-series, and T-series routing platforms.
Protocols, Class of Service, and System Basics Command Reference	Describes the JUNOS software operational mode commands you use to monitor and troubleshoot most aspects of Juniper Networks J-series, M-series, and T-series routing platforms.
System Log Messages Reference	Describes how to access and interpret system log messages generated by JUNOS software modules and provides a reference page for each message.
JUNOScript API Documentation
JUNOScript API Guide	Describes how to use the JUNOScript application programming interface (API) to monitor and configure Juniper Networks routing platforms.
JUNOScript API Configuration Reference	Provides a reference page for the configuration tags in the JUNOScript API.
JUNOScript API Operational Reference	Provides a reference page for the operational tags in the JUNOScript API.
JUNOS Comprehensive Index and Glossary
Comprehensive Index and Glossary	Provides a complete index of all JUNOS software books and the JUNOScript API Guide. Also provides a comprehensive glossary.
JUNOScope Documentation
JUNOScope Software User Guide	Describes the JUNOScope software graphical user interface (GUI), how to install and administer the software, and how to use the software to manage routing platform configuration files and monitor routing platform operations.
J-series Services Router Documentation
J-series Services Router Getting Started Guide	Provides an overview, basic instructions, and specifications for J-series Services Routers. The guide explains how to prepare your site for installation, unpack and install the router and its components, install licenses, and establish basic connectivity.
J-series Services Router Configuration Guide	Explains how to configure the interfaces on J-series Services Routers for basic IP routing with standard routing protocols. The guide also shows how to configure virtual private networks (VPNs), configure and manage multicast networks, and apply routing techniques such as policies, firewall filters, IP Security (IPSec) tunnels, and service classification for safer, more efficient routing.
J-series Services Router Administration Guide	Shows how to manage users and operations, monitor network performance, upgrade software, and diagnose common problems on J-series Services Routers.
M-series and T-series Hardware Documentation
Hardware Guide	Describes how to install, maintain, and troubleshoot routing platforms and components. Each platform has its own hardware guide.
PIC Guide	Describes the routing platform Physical Interface Cards (PICs). Each platform has its own PIC guide.
Release Notes
JUNOS Release Notes	Summarize new features and known problems for a particular software release, provide corrections and updates to published JUNOS and JUNOScript manuals, provide information that might have been omitted from the manuals, and describe upgrade and downgrade procedures.
Hardware Release Notes	Describe the available documentation for the routing platform and the supported PICs, and summarize known problems with the hardware and accompanying software. Each platform has its own release notes.
JUNOScope Software Release Notes	Contain corrections and updates to the published JUNOScope manual, provide information that might have been omitted from the manual, and describe upgrade and downgrade procedures.
J-series Services Router Release Notes	Briefly describe the J-series Services Router features, identify known hardware problems, and provide upgrade and downgrade instructions.

Table 4: JUNOS Internet Software Network Operations Guides

Book	Description
JUNOS Internet Software for M-series and T-series Routing Platforms Network Operations Guides
Baseline	Describes the most basic tasks for running a network using Juniper Networks products. Tasks include upgrading and reinstalling JUNOS software, gathering basic system management information, verifying your network topology, and searching log messages.
Interfaces	Describes tasks for monitoring interfaces. Tasks include using loopback testing and locating alarms.
MPLS	Describes tasks for configuring, monitoring, and troubleshooting an example MPLS network. Tasks include verifying the correct configuration of the MPLS and RSVP protocols, displaying the status and statistics of MPLS running on all routers in the network, and using the layered MPLS troubleshooting model to investigate problems with an MPLS network.
Hardware	Describes tasks for monitoring M-series and T-series routing platforms.

Documentation Feedback

We encourage you to provide feedback, comments, and suggestions so that we can improve the documentation. Send your comments to techpubs-comments@juniper.net, or fill out the documentation feedback form at http://www.juniper.net/techpubs/docbug/docbugreport.html. If you are using e-mail, be sure to include the following information with your comments:

• Document name
• Document part number
• Page number
• Software release version

Requesting Support

For technical support, open a support case using the Case Manager link at http://www.juniper.net/support/ or call 1-888-314-JTAC (within the United States) or 1-408-745-9500 (outside the United States).