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Juniper Networks G10 CMTS manual Troubleshooting and Maintenance, 131

Models: G10 CMTS

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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 AppendixesViii JUNOSg 3.0 G10 Cmts Hardware Guide List of Figures List of FiguresList of Figures Front Fan Tray Replacement 164List of Tables List of TablesList of Tables Objectives Audience Document OrganizationAudience Documentation Conventions Documentation ConventionsContact Juniper Networks Documentation FeedbackContact Juniper Networks Part JUNOSg 3.0 G10 Cmts Hardware Guide System Description System OverviewTypical Cmts Location System DescriptionHeadend Architecture Field-Replaceable Units FRUs Field-Replaceable Units FRUsBroadband Cable Processor Asic G10 Cmts Features and FunctionsG10 Cmts Features and Functions Functional OverviewG10 Cmts Components G10 Cmts ComponentsG10 Cmts G10 Cmts Management G10 Cmts Hardware OverviewG10 Cmts Management G10 Cmts Hardware Overview Front View of Fully Configured ChassisFront 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 OverviewChassis Physical CharacteristicsChassis Physical Specifications Specification ValueChassis Environmental Specifications Card Cage and Midplane SpecificationsCard Cage and Midplane Midplane P1 P5 Connectors Signals carried by the connectors are described in TableFront View Distribution panels are also separated into domains a and B Midplane Domains Chassis VersionsPower Supply LEDs Power SuppliesCmts Power Transition Modules Docsis Module Cooling and FansDocsis 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 CharacteristicsChassis Control Module Chassis Control ModuleThrough 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 SwitchesNIC Module NIC ModuleNIC Module Front Panel NIC Module Connectors NIC Module Physical DimensionsSingle-Mode, Long-Range Gbic Specifications Single-Mode, Midrange Gbic SpecificationsParameter Value 1000BT Gbic Specifications Multimode Gbic SpecificationsColor Function NIC Module LEDsChassis Rear Modules NIC Access ModuleNIC Access Module LEDs Chassis Rear ModulesNIC Access Module Front Panel HFC Connector Module Fast Ethernet LEDs HFC Connector ModuleHFC Connector Module Rear Panel G10 Cmts Data Flow Switched I/O Module SIM Rear Panel SIM Fast Ethernet Port LEDsHard Disk Module Hard Disk Module Rear Panel JUNOSg Internet Software Overview System Architecture OverviewJUNOSg Internet Software Overview Routing Engine Software ComponentsRouting 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 PrecautionsSafety Precautions JUNOSg 3.0 G10 Cmts Hardware Guide Power AC PowerPower Environment DC PowerG10 Cmts Environmental Specifications EnvironmentMounting MountingTools and Equipment Required for Installation Tools and Equipment Required for InstallationCoaxial Cable Requirements Characterization of Installation SiteCoaxial Cable Requirements Coaxial Cable RequirementsRF Plant/HFC Environment Characterization Characterization of Installation SiteExisting Docsis Service Characterization Upstream Parameters Port Upstream Cmts Parameter CharacterizationCharacterization of Installation Site Downstream Parameters Port Downstream Cmts Parameter CharacterizationFrequency Description of Utilization Upstream Frequency Spectrum UtilizationSummary Checklist Summary ChecklistAverage Upstream Noise Measurement Average Noise Spectrum Analyzer SettingsSetting Value Noise Measurement MethodologyAverage Upstream Noise Measurement Example Peak Noise Spectrum Analyzer SetupAdditional Characterization Tables Additional Characterization TablesDocsis Service Upstream Cmts Parameter Characterization Additional Characterization Tables Verification of Shipping Cartons Verification of Shipping CartonsG10 Cmts Installation Checklist G10 Cmts Installation ChecklistStep Number Completion Status Connect to Power Sources Install the Cmts Ground the Chassis Ground the ChassisRack 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 100Install Power Supplies Install Power Supplies101 102 Power Supply InstallationInstall a Docsis Module Install a Docsis ModuleAir Management Module Removal 104Install an HFC Connector Module or SIM Install an HFC Connector Module or SIM106 107 HFC Connector Module InstallationInstall a Chassis Control Module Install a Chassis Control ModuleInstall a Hard Disk Module Install a NIC Access ModuleCable an HFC Connector Module or SIM Cable an HFC Connector Module or SIMOn page 54 for port labeling 110111 Rear Coaxial Cable Connections 112Cable a Chassis Control Module 113Cable a NIC Module 114Cable a NIC Access Module Cable a NIC Access Module115 116 117 NIC Access Module Cable ConnectionsNIC 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 119AC Power Cord and Retainer Clip Connect to Power SourcesTerminal 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 Cmts125 Docsis Module LED StatusStatus Meaning NIC Module LED Status Chassis Control Module LED Status127 Power On and Configure the PCPower On and Configure the PC NIC Access Module LED StatusPerform Initial Software Configuration Perform Initial Software Configuration129 Root@host-name#commit 131 Troubleshooting and MaintenanceJUNOSg 3.0 G10 Cmts Hardware Guide RF Measurements Downstream RF Measurement in Catv Mode Downstream RF Measurement in Catv ModeCable-options downstream hierarchy level Downstream RF Measurement in Spectrum Analyzer ModeDownstream RF Measurement in Spectrum Analyzer Mode Rf-power rf-powerPress 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 TroubleshootingFeatures for Troubleshooting Cable modem flaps commandFlap List Output Field Value Potential Issues Flap List Association to Potential IssuesTo establish an operational baseline Output Field Object Meaning Local Event LogLocal Event Log Headings Displayed User@host show log cablePBC-CMTS-MIB MIB Operational CommandsServiceGuard 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 ConnectivityCable 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 SuppliesPower 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 Module170 Remove a NIC Access ModuleRemove a Hard Disk Module Remove a NIC Module171 JUNOSg 3.0 G10 Cmts Hardware Guide Agency Certifications SafetyAgency Certifications Immunity175 Radio Frequency RF SpecificationsDownstream RF Channel Transmission Characteristics Radio Frequency RF Specifications177 Upstream RF Channel Transmission CharacteristicsDocsis Downstream Channel Rates and Spacing Downstream RF Signal Output Characteristics16QAM Symbol Rate Channel Width Bit-rate/sec Ksym/sec KHz1179 Docsis Maximum Upstream Channel Rates and WidthsRadio 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 IndexLED 10, 16, 68, 89, 124, 149 Index Index