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Table of Contents

About This Guide
Objectives
Audience
Supported Routing Platforms
Using the Index
Using the Examples in This Manual
Documentation Conventions
List of Technical Publications
Documentation Feedback
Requesting Technical Support
Juniper Networks Hardware and Software
Juniper Networks Router Overview
Juniper Networks Router Introduction
Router Architecture for M-series Routers and T-series Platforms
Data Flow Through the Packet Forwarding Engine
Data Flow Through an M-series Router
Data Flow Through a T-series Routing Platform
Hardware Components
Chassis
Flexible PIC Concentrators
Physical Interface Cards
Routing Engine
Power Supplies
Cooling System
Monitor Hardware Components
Operational Mode CLI Commands for Router Monitoring
Cheat Sheet for the CLI Commands
CLI Operational Mode Top-Level Commands
CLI Configuration Mode Top-Level Commands
Load a Configuration Using Copy and Paste Commands
Load a Configuration from a File to a Router
Load a Configuration Using the display set Command
CLI Keyboard Shortcuts
Manage Output at the ---(more)--- Prompt
Work with Problems on Your Network
Working with Problems on Your Network
Isolate a Broken Network Connection
Identify the Symptoms
Isolate the Causes
Take Appropriate Action
Evaluate the Solution
JUNOS Internet Software in the Network
Stop and Start JUNOS Software
Stopping and Starting JUNOS Software
Stop the JUNOS Software
Reboot the JUNOS Software
Restart a JUNOS Software Process
Display Information About Software Processes
Restart a JUNOS Software Process
Check That the Process Has Restarted
Display JUNOS Software Information
Displaying JUNOS Software Information
Display JUNOS Software Information
Display Version Information for JUNOS Software Packages
Check Router Configuration
Checklist for Checking the Router Configuration
Display the Current Active Router Configuration
Display a Specific Configuration Hierarchy
Display Additional Information about the Configuration
Upgrade JUNOS Software
Checklist for Upgrading JUNOS Software
Logging Information Before You Upgrade JUNOS Software
Log the Software Version Information
Log the Hardware Version Information
Log the Active Configuration
Log the Interfaces on the Router
Log the BGP, IS-IS, and OSPF Adjacency Information
Log the System Storage Information
Back Up the Currently Running and Active File System
Download JUNOS Software
Upgrade JUNOS Software
Copy JUNOS Software to the Router
Add New Software
Start the New Software
After You Upgrade JUNOS Internet Software
Compare Information Logged Before and After the Upgrade
Back Up the New Software
Reinstall JUNOS Software
Checklist for Reinstalling JUNOS Software
Before You Reinstall JUNOS Software
Log the Software Version Information
Log the Hardware Version Information
Log the Chassis Environment Information
Log the System Boot-Message Information
Log the Active Configuration
Log the Interfaces on the Router
Log the BGP, IS-IS, and OSPF Adjacency Information
Log the System Storage Information
Back Up the Currently Running and Active File System
Have the Boot Floppy or PCMCIA Card Ready
Reinstall the JUNOS Software
Reconfigure the JUNOS Software
Configure Names and Addresses
Set the Root Password
Check Network Connectivity
Copy Backup Configurations to the Router
After You Reinstall JUNOS Software
Compare Information Logged Before and After the Reinstall
Back Up the New Software
Verify Your Network Topology
Verify Juniper Networks Routers
Checklist for Verifying Juniper Networks Routers
Check Router Components
Check the Router Component Status
Check the Router Craft Interface
Check the Component LEDs
Display Detailed Component Environmental Information
Display Detailed Operational Information About Components
Gather Component Alarm Information
Display the Current Router Alarms
Display Error Messages in the Messages Log File
Display Error Messages in the Chassis Process Log File
Verify the Component Problem
Fix the Problem
Contact JTAC
Return the Failed Component
Verify Physical Interfaces on the Router
Checklist for Verifying Physical Interfaces on a Router
Check Physical Interfaces on a Router
Display Summary Interface Information
Display Detailed Interface Information
Display Real-Time Statistics about a Physical Interface
Check System Logging
Verify the IS-IS Protocol and Adjacencies
Checklist for Verifying the IS-IS Protocol and Adjacencies
Verify the IS-IS Configuration on a Router in a Network
Check the Configuration of a Level 1/Level 2 Router
Check the Configuration of a Level 1 Router
Check the Configuration of a Level 2 Router
Display the Status of IS-IS Adjacencies
Verify Adjacent Routers
Examine a Route
Examine the Forwarding Table
Examine the Link-State Database
Examine a Link-State Protocol Data Unit Header
Verify the OSPF Protocol and Neighbors
Checklist for Verifying the OSPF Protocol and Neighbors
Verify the OSPF Protocol
Check OSPF on an ASBR
Check OSPF on an ABR
Check OSPF on a Stub Router
Check OSPF Neighbors
Verify OSPF Neighbors
Examine the OSPF Link-State Database
Examine OSPF Routes
Examine the Forwarding Table
Examine Link-State Advertisements in Detail
Examine a Type 1 Router LSA
Examine a Type 3 Summary LSA
Examine a Type 4 ASBR Summary LSA
Examine a Type 5 AS External LSA
Examine Type 7 NSSA External LSA
Verify the BGP Protocol and Peers
Checklist for Verifying the BGP Protocol and Peers
Verify the BGP Protocol
Verify BGP on an Internal Router
Verify BGP on a Border Router
Verify BGP Peers
Check That BGP Sessions Are Up
Verify That a Neighbor is Advertising a Particular Route
Verify That a Particular BGP Route Is Received on Your Router
Examine BGP Routes and Route Selection
Examine the Local Preference Selection
Examine the Multiple Exit Discriminator Route Selection
Examine the EBGP over IBGP Selection
Examine the IGP Cost Selection
Examine Routes in the Forwarding Table
Verify the Routing Engine CPU Memory
Checklist for Verifying the Routing Engine CPU Memory
Check the Routing CPU Memory Usage
Check Overall CPU and Memory Usage
Check Routing Protocol Process (rpd) Memory Usage
Display Tasks
Verify Traffic and Packets Through the Router
Checklist for Verifying Traffic and Packets through the Router
Monitor Traffic through the Router
Display Real-Time Statistics about All Interfaces on the Router
Display Real-Time Statistics about an Interface
Verify Packets
Monitor Packets Sent from and Received by the Routing Engine
Display Key IP Header Information
Show Packet Count When a Firewall Filter Is Configured with the Count Option
Display Traffic from the Point of View of the Packet Forwarding Engine
Use the ping and traceroute Commands
Checklist for Using the ping and traceroute Commands
Check the Accessibility of Two Routers on the Edge
Use Loopback Addresses
Use Interface Addresses
Examples of Unsuccessful ping and traceroute Commands
Use MIBs
Checklist for Using MIBs
Determine Which MIBs Are Supported by a Juniper Release
Run Snmpwalk from an NMS System to a Juniper Router
Use SNMP Trace Operations to Monitor a Router
Configure Trace Operations for SNMP
Query a MIB With SNMPGet
Display the Output for SNMP Trace Operations
Monitor Memory Usage on a Router
Check Memory Utilization on Chassis Components
Check Memory Utilization per Process
Monitor CPU Utilization
Check CPU Utilization
Check CPU Utilization per Process
Retrieve Version Information about Router Software Components
Gather System Management Information
Display Basic Chassis Information
Checklist for Displaying Basic Chassis Information
Display Basic Chassis Information
Display and Locate Files and Directories
Checklist for Displaying and Locating Files and Directories on a Router
Copy a File on a Routing Engine
Copy a File from One Routing Engine to Another
Copy Files between the Local Router and a Remote System
Maintain a Single Configuration File for Both Routing Engines
Configure the New Group
Apply the New Group
List Files and Directories on a Router
Display File Contents
Rename a File on a Router
Delete a File on a Router
Check Time on a Router
Checklist for Checking Time on a Router
Check the Time on a Router
Check How Long Router Components Have Been Up
Check the NTP Peers
Check the NTP Status
Check User Accounts and Permissions
Checklist for Checking User Accounts and Permissions
Understand User Accounts and Permissions
Check Users Logged In To a Router
Check for Users in Configuration Mode
Check the Commands That Users Are Entering
Configure the Log File for Tracking CLI Commands
Display the Configured Log File
Log a User Out of the Router
Check When the Last Configuration Change Occurred
Configure Configuration Change Tracking
Display the Configured Log File
Force a Message to Logged-In User Terminals
Check RADIUS Server Connectivity
Search Log Messages
Track Normal Operations
Checklist for Tracking Normal Operations
Configure System Logging
Log Messages to a Local Log File
Log Information to a Remote Host
Log Information to a User Terminal
Log Information to a Router Console
Configure the Number and Size of Log Files
Log BGP State Transition Events
Display a Log File
Monitor Messages in Near-Real Time
Stop Monitoring Log Files
Track Error Conditions
Checklist for Tracking Error Conditions
Configure Routing Protocol Process Tracing
Configure Routing Protocol Process Tracing
Configure Routing Protocol Tracing for a Specific Routing Protocol
Monitor Trace File Messages Written in Near-Real Time
Stop Trace File Monitoring
Configure BGP-Specific Options
Display Detailed BGP Protocol Information
Diagnose BGP Session Establishment Problems
Configure IS-IS-Specific Options
Display Detailed IS-IS Protocol Information
Display Sent or Received IS-IS Protocol Packets
Analyze IS-IS-Link State Packets in Detail
Configure OSPF-Specific Options
Diagnose OSPF Session Establishment Problems
Analyze OSPF Link-State Advertisement Packets in Detail
Collect Crash Data
Checklist for Collecting Crash Data
Understand Crash Data Collection
Collect Crash Data for a Routing Engine Kernel
Check the Routing Engine Core Files
List the Core Files
Compress the vmcore File
Log Software Version Information
Open a Case with JTAC
Collect Crash Data for Routing Engine Daemons
Check for Daemon Core Files
List the Daemon Core Files
Compress the Daemon Core Files
Log Software Version Information
Open a Case with JTAC
Collect Crash Data for the Packet Forwarding Engine Microkernel
Display the Crash Stack Traceback and Registration Information
Clear the NVRAM Contents
Check Packet Forwarding Engine Microkernel Core Files
List the Core Files Generated by the Crash
Compress the Core Files
Log Software Version Information
Open a Case with JTAC
Appendix
Index
Index
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