Cisco Systems UBR10012 Testing with Digital Multimeters and Cable Testers, Equipment Description

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A P P E N D I X B

Recommended Tools and Test Equipment

Table B-1lists the basic tools and test equipment necessary to perform general maintenance and troubleshooting tasks on the Cisco uBR10012 router.

Table B-1 Recommended Tools and Test Equipment

Equipment	Description

Number 2 Phillips and flat-head	Small and medium-sized.
screwdrivers

Voltage tester	Refer to the “Testing with Digital Multimeters and Cable
	Testers” section on page B-1.

Optical fiber test equipment	Refer to the “Testing with Digital Multimeters and Cable
	Testers” section on page B-1.

Cable testing equipment	Refer to the “Testing with Digital Multimeters and Cable
	Testers” section on page B-1.

ESD-preventive wrist or ankle	—
strap with connection cord

The following sections describe advanced testing equipment to aid in complex problem isolation.

Testing with Digital Multimeters and Cable Testers

Use a digital multimeter to measure parameters such as AC and DC voltage, current, resistance, capacitance, cable continuity. Use cable testers, also, to verify physical connectivity.

Use cable testers (scanners) to check physical connectivity. Cable testers are available for shielded twisted pair (STP), unshielded twisted pair (UTP), 10BaseT, and coaxial and twinax cables. A given cable tester might be able to perform any of the following functions:

•Test and report on cable conditions, including near-end crosstalk (NEXT), attenuation, and noise.

•Perform time domain reflectometer (TDR), traffic monitoring, and wire map functions.

•Display Media Access Control (MAC) layer information about LAN traffic, provide statistics such as network utilization and packet error rates, and perform limited protocol testing (for example, TCP/IP tests such as ping).

Cisco uBR10012 Universal Broadband Router Troubleshooting Guide

	OL-1237-01	B-1

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Contents Text Part Number OL-1237-01 Corporate HeadquartersCopyright 2001-2004, Cisco Systems, Inc All rights reserved N T E N T S ARP Traffic Testing with Digital Multimeters and Cable Testers B-1 OL-1237-01 Audience PurposeChapter Description Document OrganizationRelated Documentation Documentation Feedback Obtaining DocumentationCisco.com Ordering DocumentationOpening a TAC Case Obtaining Technical AssistanceCisco TAC Website TAC Case Priority Definitions Obtaining Additional Publications and InformationXii Basic Troubleshooting Tasks and Startup Issues Basic Troubleshooting ChecklistConfirming the Hardware Installation Displaying the Cisco IOS Software Version Last reset from power-onDisplaying System Environment Information Hardware Troubleshooting FlowchartTCC+ Cisco uBR10012 System Startup SequenceStartup Event Event Description AC PEM Faults PEM Faults and Fan Assembly FailuresColor Description Fault Symptom Corrective ActionDC PEM Faults DC PEM Front Panel original model, UBR10-PWR-DC 2400W AC-Input Power Shelf Fault Other Electrical ProblemsAC OK DC OKFan Assembly Module Fan Assembly Module FaultsFan Assembly Air Circulation Pattern MULTI-FAN Failure LED Symptom Steps to TakeSingle FAN Failure OL-1237-01 Troubleshooting PRE-1 Modules Message Description PRE Module Not SupportedPRE-1 Module Status Screen IOS Prot Booting Up with Redundant PRE-1 ModulesIOS Intf IOS RUNPRE-1 Module Faults LED Fault Steps to TakeC10000config#interface fastethernet0/0/0 Ethernet Connection ProblemsConsole Port Serial Connection Problems Troubleshooting System Crashes Troubleshooting Common System ProblemsARP Traffic High CPU Utilization ProblemsRouterconfig-if# ip access-groupnumber Exec and Virtual Exec Processes Cpuhog ErrorsDebug and System Messages IP Input Processing Invalid Scheduler Allocate ConfigurationInterrupts are Consuming a Large Amount of Resources Snmp Traffic Bus ErrorsProblems with Access Lists Region Manager Start End Sizeb Class Media Name 0x0A000000 Alignment Errors Memory ProblemsMemory Parity Errors Low Memory ErrorsParticle Pool Fallbacks Spurious Interrupts Spurious Memory Accesses OL-1237-01 Troubleshooting Line Cards Command Description General Information for Troubleshooting Line Card CrashesSIG Value SIG Name Error Reason Sigreload Cache Parity ErrorsSigerror Bus Errors Software-Forced Crashes Troubleshooting Line Cards TCC+ Front Panel Status Description PowerMaintenance Fault Type Response Show controllers clock-reference command Troubleshooting the OC-12 Packet-Over-SONET Line Card Fault Corrective Action RX CARRIER-A RX CARRIER-BActive PASS-THROUGH EnabledFail EnablePOS SRPPass Thru SyncWrap Gigabit Ethernet Line Card Faceplate and LED Descriptions Troubleshooting the Gigabit Ethernet Line CardGigabit Ethernet Line Card Faults and Recommended Responses OL-1237-01 Password Recovery Procedure Password Recovery Procedure OverviewPress Return. The user Exec prompt appears Change all three passwords using the following commands OL-1237-01 Unsupported Frame Relay Commands Unsupported CommandsMlppp Commands Hccp CommandsUnsupported PPP Commands Unsupported Mpls VPN CommandsSpectrum Management Commands Unsupported Telco-Return CommandsOL-1237-01 Equipment Description Testing with Digital Multimeters and Cable TestersTesting with OTDRs Testing with TDRs and OTDRsTesting with TDRs Testing with Breakout Boxes, Fox Boxes, and BERTs/BLERTs Testing with Network MonitorsTesting with Network Analyzers Active LED Enable LEDBert BlertMAINTENANCE, OC-12 SRP/DPT ENABLE, OC-48 DPT/POSMAINTENANCE, TCC+ POWER, OC-12 DPT/SRP POWER, TCC+Power LED Maintenance LEDSTATUS, OC-12 DPT/SRP STATUS, TCC+ SYNC, OC-48 DPT/POS TX, OC-48 DPT/POS WRAP, OC-48 DPT/POSPresent LED TCC+ OC-12 DPT/SRP TCC+RX Carrier LED RX LED RX Pkts LEDWrap LED TDR B-2TX LED OC-48 DPT/POS IN-6