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Cisco Systems CISCO10720 manual Additional Troubleshooting Resources, Loopback Testing

Models: CISCO10720

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Chapter 5 Troubleshooting the Uplink Cards

Additional Troubleshooting Resources

Loopback Testing

The POS uplink card supports two loopback modes for network testing, fault isolation, and agency compliance. The uplink card loopback modes are:

Internal loopback mode—Packets sent from the Cisco 10720 Internet Router out of the uplink card POS port TX optics are also looped back into the Cisco 10720 Internet Router.

Line loopback mode—Packets received by the POS uplink card port RX optics and sent into the Cisco 10720 Internet Router are also looped back out of the uplink card port TX optics.

Loopback testing is enabled through software. See the Cisco IOS Software Configuration for the Cisco 10720 Internet Router.

Additional Troubleshooting Resources

For more troubleshooting information for the uplink card, refer to the following publications:

•Chapter 4, “Troubleshooting”, in the Cisco 10720 Internet Router Installation and Configuration Guide

•Cisco IOS Software Configuration for the Cisco 10720 Internet Router document

Cleaning the Fiber-Optic Connections

For information about cleaning fiber-optic cable connectors and receptacles, see the Inspection and Cleaning Procedures for Fiber-Optic Connections document. It provides detailed illustrations and photos of procedures and equipment required to properly clean fiber-optic connections.

		Book Title
		Book Title
	78-13113-06 B0			5-17
	78-13113-06 B0			5-17

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Cisco Systems CISCO10720 Additional Troubleshooting Resources, Cleaning the Fiber-Optic Connections, Loopback Testing

Contents

Corporate Headquarters Copyright 2003-2006 Cisco Systems, Inc. All rights reserved N T E N T S Disconnect Device Warning LEDs 78-13113-06 B0 Objectives Document Revision HistoryDocument Version Date Product Name Reference OrganizationSection Title Description Electromagnetic Compliance Site Wiring Distance and Interference GuidelinesElectromagnetic Compatibility Regulatory Statements Translated Safety Warnings Preface Translated Safety Warnings Product Documentation DVD Related DocumentationObtaining Documentation Cisco.comCisco Product Security Overview Documentation FeedbackOrdering Documentation Obtaining Technical Assistance Reporting Security Problems in Cisco ProductsCisco Technical Support & Documentation Website Definitions of Service Request Severity Submitting a Service RequestXvi Obtaining Additional Publications and InformationXvii Xviii Product Number Product Name Product Number and Product NamesDPT Uplink Card Faceplate and Specifications Product ID POS/DPT Uplink Card Faceplate and SpecificationsProduct ID Description OC48 SFP Module Specifications RPR/SRP Uplink Card Faceplate and SpecificationsOptical Cable Distance SFP Product ID Operating Transmit Power1 Optical Cable SpecificationsSpecification Description SFP Module Transmit Power Receive Power Power BudgetCisco 10720 Internet Router Console/Auxiliary Card Console/Auxiliary Card Faceplate and Specifications78-13113-06 B0 Hardware Requirements Preparing for InstallationRouter# show version Software RequirementsDisconnect Device Warning Safety and ComplianceSafety Information and Electromagnetic Compliance Safety WarningsPreventing Electrostatic Discharge Laser SafetyAttaching an ESD-Preventive Strap Preparing for Installation Safety and Compliance Book Title Tools and Equipment Required Installing and Removing the Uplink CardsPowering Down the Router Preparing for InstallationRemoving the Router from the Power Source Removing the Cable-Management System Verifying That the Router Is Powered DownRemoving the Cable-Management Cover Removing the RPR/SRP Uplink Card SFP Modules Disconnecting the Optical Interface CableRemoving a Bale Clasp SFP Module Spring-Loaded Screws on the Uplink Card Removing the Uplink Card11 Inserting the Uplink Card in the Router Chassis Installing an Uplink CardRPR SFP Installing the OC48 SFP Modules in the RPR/SRP Uplink Card13 Simplex Optical Cable Optical interface cable connector1 16 DPT Uplink Card Ports 18 RPR/SRP Uplink Card Ports 19 Attaching Cable-Management Tray Installing the Cable-Management System21 Installing Cable-Management Cover Turning On Power to the Router23 AC Power Cord Connected to Router Connecting the AC Power SupplyClose the wire bracket over the power cord plug. See Figure 26 Power Switch in the On Position Connecting the DC Power SupplyGround lead Negative lead Positivelead Book Title 66303 Verifying Uplink Card FunctionalityConfiguring Basic Ieee 802.17 RPR Functionality Configuring Basic POS FunctionalityConfiguring Basic SRP Functionality DPT Uplink Card Creating a Four-Node Ring Using the Uplink CardsCable Connections Four-Node DPT Ring RPR/SRP Uplink Card-IEEE 802.17 RPR ModeCreating an Ieee 802.17 Mode Ring Using RPR/SRP Uplink Cards Node Inner Ring-Ringlet Outer Ring-Ringlet 78-13113-06 B0 Verifying the Uplink Card Connection Troubleshooting the Uplink CardsDPT and POS/DPT Uplink Card LEDs LEDsActivity Description Green Port is active Off Port is not active RPR/SRP Uplink Status LEDs RPR/SRP Uplink Card LEDsRPR/SRP Uplink Card System LEDs Fiber Misconnection-RPR/SRP Uplink Card Troubleshooting the Uplink Cards InstallationAlarm Messages Fiber Misconnection-DPT Uplink CardsAIS Alarm Description SolutionIeee 802.17 RPR Wrap Messages RPR-IEEE1/1 Alarm DescriptionLais Station using the show rpr-ieee rate-limit Rpr-iee topology command to verify WTR Router# show controllers rpr-ieee 1/1 transceiver Troubleshooting the RPR/SRP Uplink Card InstallationAlarm Processing Troubleshooting the POS Uplink Card InstallationShow controllers pos1/1 Cleaning the Fiber-Optic Connections Additional Troubleshooting ResourcesLoopback Testing 78-13113-06 B0 D E IN-2 IN-3