Troubleshooting, Diagnosing Problems | Juniper Networks 8 instruction

Chapter 9

Troubleshooting

This chapter explains how you can troubleshoot a specific problem, such as abnormal LED activity or no system power, when you power up the router. It contains the following sections:

Diagnosing Problems on page 103

Troubleshooting Power Failures on page 104

Understanding Status LEDs to Troubleshoot on page 104

Monitoring Temperatures of Modules on page 113

Resetting Line Modules and SRP Modules on page 114

Double-Bit Errors on SRP Modules on page 114

Diagnosing Problems

When you first encounter a system problem:

1.Make sure power connections are securely attached.

2.Observe the system’s LEDs carefully.

3.Make sure cable connections on the system modules are securely attached.

If a problem is beyond the scope of this chapter, see “Contacting Customer

Support and Returning Hardware” on page 151 for further instructions.

NOTE: Running the show version and show hardware commands is often a good first step when trying to troubleshoot a problem.

Initialization Sequence

Each line module is initialized independently. As a result, the command-line interface (CLI) on the SRP module can become available before the line modules have completed initialization. Commands relating to a line module

Diagnosing Problems 103

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Juniper Networks 8 manual Troubleshooting, Diagnosing Problems

Contents

ERX Hardware Guide Series Routing Platforms ERX Hardware Guide, Release End User License Agreement Page Table of Contents Chapter Unpacking and Inspecting ERX Routers Part Initial Installation Chapter Cabling ERX Routers Part Procedures Part Appendixes Appendix a System Specifications Part Index Objectives About This GuideAudience Documentation Conventions Series RoutersIcon Meaning Description Convention Description Examples List of Technical Publications Issue the clock source Xiv JUNOSe Software Guides Xvi Documentation Feedback Obtaining Documentation Requesting Support Product Overview Product Overview Overview ERX OverviewERX Routers ERX-14xx Models ERX-14xx Models, Front View ERX-14xx Models, Rear View ERX-7xx Models ERX-7xx Models, Front View ERX-310 Router, Front View AC Model ERX-310 Router ERX-310 Router, Rear View AC Model ERX Modules Modules in ERX-14xx Models SRP Module SRP Module for ERX-7xx and ERX-14xx Models Module Details SRP I/O Module SRP Module Redundancy Line Modules Representative Line Module Modules Network Management Tools Redundancy Features NVS Cards Shows the data flow when a spare line module becomes active Data Flow When a Spare Line Module Is Active Power Fans Initial Installation Initial Installation Before You Begin Unpacking and Inspecting ERX RoutersUnpacking ERX-14xx Models Removing an L-Bracket Unpacking ERX-7xx Models and ERX-310 Routers If You Detect or Suspect Damage Inspecting Router Components and AccessoriesContacting Juniper Networks Next Step ERX 8.0.x Hardware Guide Next Step Freestanding Installation Installing ERX Routers Installation Guidelines Rack-Mounted Installation Installing ERX Routers ERX Routers Installed in Recommended Order Safety Guidelines Installing ERX Routers Rack-Mounted Installation Preparing the Equipment Racks Installing the Router Next Step ERX 8.0.x Hardware Guide Next Step Installing Modules Orientation of Line Modules in ERX Routers Slot Groups Slot Groups for the ERX-7xx Models Combinations of Line Modules In Slot Groups Managing Modules Using the SoftwareOC48 Line Modules GE-2 Line Modules Grounding Jack Locations Series Router Connecting the Wrist Strap to the ERX-310 Router Rear Required Tools and Safety Items Order of InstallationSafety Guidelines SRP Module Slot Assignments Router Installing SRP I/O and SRP Modules Installing an SRP Module Installing an SRP I/O Module Ejectors in the Open Position Installing a Line Module or an I/O Module Installing Line and I/O Modules Module Slot Assignments Router Removing a Line Module, SRP Module, or SRP I/O Module Ejectors in the Closed Position Installing the Line Modules Installing Components for Line Module RedundancyInstalling the Redundancy Midplane Enter the halt command Installing a Redundancy Midplane Installing the I/O Modules Configuring Line Module Redundancy Verifying the Installation ERX 8.0.x Hardware Guide Next Step Cabling Overview Cabling ERX Routers ERX Ports and Connectors ERX-14xx Model Shown Required Cables Connection Port and Cable Used Required Tools, Wires, and Cables External Timing Ports Cabling the SRP I/O ModuleSRP I/O Ports Description Cabling ERX Routers SRP I/O Module for ERX-14xx Models SRP I/O Module for the ERX-310 Router Management Ports Cabling the Router for Power Connecting to the Network ERX-14xx models Power Input Module Cables and Wires Needed Cable/Wire From Power Input Module for ERX-14xx Models Task 1 Turn Off All Router Power Task 2 Connect the Grounding Cables Task 3 Connect the Power Cables ERX 8.0.x Hardware Guide ERX-310 Router AC Model Hssi Connectors BNC ConnectorsCabling I/O Modules RJ-48C Connectors RJ-45 Connectors SC Duplex Connectors LC Duplex Connectors Class 1 LED Product O Module with SC Full Duplex Connectors SMB Connectors O Module with SMB Connectors 21/V.35 Connectors Redundant Ports 21/V.35 Module with 50-Pin X.21/V.35 Connector Before You Power Up the System Powering Up ERX RoutersPowering Up Initialization Sequence Status LEDs Powering Down ERX 8.0.x Hardware Guide Next Step Setting Up Management Access Accessing ERX Routers Using HyperTerminal Console Port SetupConnecting Directly to the Router Management Ports for ERX Routers Assigning an IP Address Telnet Setup Enter the configure command Snmp Maintaining ERX Routers on Troubleshooting on Page Required Tools and Items Maintaining ERX Routers Storing Modules and Components Cleaning the System Upgrading a System That Contains One SRP Module Upgrading NVS Cards on SRP Modules Upgrading a System That Contains Two SRP Modules Replacing an NVS Card NVS Card Slot on SRP Module Upgrading Memory on SRP Modules Removing SODIMMs Displaying the Memory Installed Sodimm Sockets on the SRP-5 and SRP-10 Module Adding New SODIMMs Replacing SFPs on I/O Modules Verifying the Upgrade Possible Release Mechanisms on the SFP Removing SFPs Example of SFP Installing SFPs Installing an SFP on a GE I/O Module Replacing Fan Trays Fan Tray in ERX-14xx Models Removing the Fan Tray Installing the Fan Tray 100 Installing a Cable-Management Bracket on ERX-7xx Models 101 102 Diagnosing Problems Troubleshooting Causes of Power Failures Symptom Possible Problems Actions Troubleshooting Power FailuresUnderstanding Status LEDs to Troubleshoot Redundant LED Identification 106 107 SRP Module LEDs 109 LED Activity Normal Activity of Functional Status Leds During Booting Status Process Issue the reload slot slotnumber 112 Redundancy Status Monitoring Temperatures of ModulesRedundancy Status of a Line Module Double-Bit Errors on SRP Modules Resetting Line Modules and SRP ModulesDetecting Double-Bit Errors Fixing Double-Bit Errors 116 Appendixes Appendixes ERX-14xx Models Specifications System SpecificationsERX-14xx Models Specifications Category Space Requirements Category Specification 121 ERX-7xx Models Specifications Category ERX-7xx Models Specifications 123 124 ERX-310 Router Specifications Category ERX-310 Router Specifications 126 127 128 Your Preinstallation Responsibilities Installation Guidelines Requirements Regulatory Compliances Environmental Requirements Installation Guidelines and Requirements Safety Guidelines ERX-310 Router Warnings AC Model ERX-310 Power Cord Warnings AC Model Equipment Rack Requirements Mechanical Requirements ERX Routers Installed in a Rack Space Requirements Proper Rack Installation Airflow for ERX Routers Cabling Recommendations Product Reclamation and Recycling Program Federal Communications Commission FCC Statement Hardware Compliance Industry Canada Notice CS-03 FCC Requirements for Consumer Products Avis CS-03 d’Industrie Canada C. Explanatory Notes Equipment Attachment Limitations EC Declaration of Conformity SRP I/O Module Cable Pinouts SRP I/O Module Serial Port SRP I/O Module-RS-232 Serial Connector Pinout Signal SRP I/O Module Ethernet Port SRP I/O Module-RJ-45 Connector Pinout Signal Lists the pinout for the straight-through adapter CT1 and CE1 I/O Modules CT1 I/O Module Ports CT1/CE1 I/O Module-RJ-48C Connector Pinout Signal Pinout of 50-Pin Telco Connector to Ports Signal CE1 I/O Module with Telco Connectors 149 Pin Signal 150 Contacting Customer Support and Returning Hardware Return ProcedureContacting Customer Support 152 Locating Component Serial Numbers Representative Module Serial Number ID Label Information You Might Need to Supply to Jtac Tools and Parts Required Returning Products for Repair or ReplacementPacking Instructions for Returning a Chassis 155 156 Declaration of Conformity Declaration of Conformity 158 Index Index Accessing Symbols Series routers Modules QoS, packet classification for 21/V.35 connectors, cabling