Troubleshooting and Maintenance, 131 | Juniper Networks G10 CMTS

Part 3

Troubleshooting and Maintenance

!RF Measurements on page 133

!Troubleshooting on page 141

!Replacement Procedures on page 159

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131

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Juniper Networks G10 CMTS manual Troubleshooting and Maintenance, 131

Contents

Release G10 Cmts Hardware Guide Table of Contents Chapter Initial Installation Part Index Appendixes Viii JUNOSg 3.0 G10 Cmts Hardware Guide List of Figures List of Figures List of Figures Front Fan Tray Replacement 164 List of Tables List of Tables List of Tables Objectives Audience Document OrganizationAudience Documentation Conventions Documentation Conventions Contact Juniper Networks Documentation FeedbackContact Juniper Networks Part JUNOSg 3.0 G10 Cmts Hardware Guide System Description System Overview Typical Cmts Location System Description Headend Architecture Field-Replaceable Units FRUs Field-Replaceable Units FRUs Broadband Cable Processor Asic G10 Cmts Features and FunctionsG10 Cmts Features and Functions Functional Overview G10 Cmts Components G10 Cmts Components G10 Cmts G10 Cmts Management G10 Cmts Hardware OverviewG10 Cmts Management G10 Cmts Hardware Overview Front View of Fully Configured Chassis Front View of Partially Configured Chassis Rear View of Fully Configured Chassis Air Management Panel Rear JUNOSg 3.0 G10 Cmts Hardware Guide G10 Cmts Hardware Overview G10 Cmts Hardware Overview Chassis Hardware Component Overview Chassis Physical CharacteristicsChassis Physical Specifications Specification Value Chassis Environmental Specifications Card Cage and Midplane SpecificationsCard Cage and Midplane Midplane P1 P5 Connectors Signals carried by the connectors are described in Table Front View Distribution panels are also separated into domains a and B Midplane Domains Chassis Versions Power Supply LEDs Power Supplies Cmts Power Transition Modules Docsis Module Cooling and Fans Docsis Module Front Panel Functional Characteristics Data Packet Processing Higher Layer Functions MAC Layer Functions Modem Management Docsis Module LEDs Physical and Electrical CharacteristicsDocsis Module Physical Dimensions Docsis Module Operational Characteristics Chassis Control Module Chassis Control Module Through the Chassis Control Module Chassis Control Module Front Panel Configuration, State, and Alarm Data Chassis Control Module LEDs Chassis Control Module Physical DimensionsChassis Control Module Connectors Chassis Control Module Switches NIC Module NIC Module NIC Module Front Panel NIC Module Connectors NIC Module Physical Dimensions Single-Mode, Long-Range Gbic Specifications Single-Mode, Midrange Gbic SpecificationsParameter Value 1000BT Gbic Specifications Multimode Gbic Specifications Color Function NIC Module LEDs Chassis Rear Modules NIC Access ModuleNIC Access Module LEDs Chassis Rear Modules NIC Access Module Front Panel HFC Connector Module Fast Ethernet LEDs HFC Connector Module HFC Connector Module Rear Panel G10 Cmts Data Flow Switched I/O Module SIM Rear Panel SIM Fast Ethernet Port LEDs Hard Disk Module Hard Disk Module Rear Panel JUNOSg Internet Software Overview System Architecture Overview JUNOSg Internet Software Overview Routing Engine Software Components Routing and Forwarding Tables Interface Process Tools for Accessing and Controlling the Software Software Installation and Upgrade ProceduresSoftware Monitoring Tools Data Path Processing Downstream Data PathData Path Processing Upstream Data Path G10 Cmts Data Flow Part JUNOSg 3.0 G10 Cmts Hardware Guide Prepare the Site Safety Precautions Safety Precautions Safety Precautions JUNOSg 3.0 G10 Cmts Hardware Guide Power AC PowerPower Environment DC PowerG10 Cmts Environmental Specifications Environment Mounting Mounting Tools and Equipment Required for Installation Tools and Equipment Required for Installation Coaxial Cable Requirements Characterization of Installation SiteCoaxial Cable Requirements Coaxial Cable Requirements RF Plant/HFC Environment Characterization Characterization of Installation Site Existing Docsis Service Characterization Upstream Parameters Port Upstream Cmts Parameter Characterization Characterization of Installation Site Downstream Parameters Port Downstream Cmts Parameter Characterization Frequency Description of Utilization Upstream Frequency Spectrum Utilization Summary Checklist Summary Checklist Average Upstream Noise Measurement Average Noise Spectrum Analyzer SettingsSetting Value Noise Measurement Methodology Average Upstream Noise Measurement Example Peak Noise Spectrum Analyzer Setup Additional Characterization Tables Additional Characterization Tables Docsis Service Upstream Cmts Parameter Characterization Additional Characterization Tables Verification of Shipping Cartons Verification of Shipping Cartons G10 Cmts Installation Checklist G10 Cmts Installation Checklist Step Number Completion Status Connect to Power Sources Install the Cmts Ground the Chassis Ground the Chassis Rack Mounting Air Flow Through Chassis 17.3 in 439.4 mm 18.6 in 472.6 mm Front Lifting the Chassis Rack-Mounted Chassis Rack Fully Populated with Three G10 Cmts Chassis 100 Install Power Supplies Install Power Supplies101 102 Power Supply Installation Install a Docsis Module Install a Docsis Module Air Management Module Removal 104 Install an HFC Connector Module or SIM Install an HFC Connector Module or SIM 106 107 HFC Connector Module Installation Install a Chassis Control Module Install a Chassis Control ModuleInstall a Hard Disk Module Install a NIC Access Module Cable an HFC Connector Module or SIM Cable an HFC Connector Module or SIM On page 54 for port labeling 110 111 Rear Coaxial Cable Connections 112 Cable a Chassis Control Module 113 Cable a NIC Module 114 Cable a NIC Access Module Cable a NIC Access Module115 116 117 NIC Access Module Cable Connections NIC Access Module Wiring Plan NIC Access Module in Slot118 Attach a PC to the Chassis Control Module Connect to Power SourcesAttach a PC to the Chassis Control Module 119 AC Power Cord and Retainer Clip Connect to Power Sources Terminal block. The guard will be reinstalled in step DC Power Transition Module Connect the Power and Perform Initial Configuration Power On the G10 Cmts123 Power Fault Power On the G10 Cmts 125 Docsis Module LED StatusStatus Meaning NIC Module LED Status Chassis Control Module LED Status 127 Power On and Configure the PCPower On and Configure the PC NIC Access Module LED Status Perform Initial Software Configuration Perform Initial Software Configuration 129 Root@host-name#commit 131 Troubleshooting and Maintenance JUNOSg 3.0 G10 Cmts Hardware Guide RF Measurements Downstream RF Measurement in Catv Mode Downstream RF Measurement in Catv Mode Cable-options downstream hierarchy level Downstream RF Measurement in Spectrum Analyzer ModeDownstream RF Measurement in Spectrum Analyzer Mode Rf-power rf-power Press the Span key and enter 6 MHz Upstream RF Measurement Upstream RF MeasurementCable-options upstream Preamble Multiple Upstream Bursts Upstream RF Measurement Features for Troubleshooting Troubleshooting Features for Troubleshooting Cable modem flaps commandFlap List Output Field Value Potential Issues Flap List Association to Potential Issues To establish an operational baseline Output Field Object Meaning Local Event LogLocal Event Log Headings Displayed User@host show log cable PBC-CMTS-MIB MIB Operational Commands ServiceGuard Management System Cmts Power and Booting Issues Cmts Is Not Powering UpCmts Power and Booting Issues Cmts Powers Down Ideal HFC Plant Configuration Issues Ideal HFC Plant Configuration IssuesCable Modem Cannot Successfully Range Cable Modem Cannot Successfully Register Cable Modem Cannot Establish IP Connectivity Cable Modem Throughput is Slow User@host show cable modemUser@host show cable qos-profile Ideal HFC Plant Configuration Issues User@host show cable modem summary total interface Ideal HFC Plant Configuration Issues HFC Plant Related Issues HFC Plant Related IssuesCable Modem is Dropped Cable Modem Cannot Successfully Range CMTS, which reduces the cable modem throughput Replacement Procedures Power Supplies Remove Power Supplies Power Supply Removal Fan Trays Replace a Fan TrayFan Trays Front Fan Trays Front Fan Tray Replacement Rear Fan Tray Replacement Module Removal Remove a Docsis ModuleModule Removal Docsis Module Removal Remove an HFC Connector Module or SIM User@host request system halt Remove a Chassis Control Module 170 Remove a NIC Access ModuleRemove a Hard Disk Module Remove a NIC Module 171 JUNOSg 3.0 G10 Cmts Hardware Guide Agency Certifications Safety Agency Certifications Immunity 175 Radio Frequency RF Specifications Downstream RF Channel Transmission Characteristics Radio Frequency RF Specifications 177 Upstream RF Channel Transmission Characteristics Docsis Downstream Channel Rates and Spacing Downstream RF Signal Output Characteristics 16QAM Symbol Rate Channel Width Bit-rate/sec Ksym/sec KHz1179 Docsis Maximum Upstream Channel Rates and Widths Radio Frequency RF Specifications EIA Channel Plans EIA Channel PlanChannel EIA Channel Plans AAA EIA Channel Plans STD IRC HRC EIA Channel Plans 187 JUNOSg 3.0 G10 Cmts Hardware Guide Index Docsis Index LED 10, 16, 68, 89, 124, 149 Index Index