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Cisco Systems CISCO1750 manual Recovering a Lost Password, Changing the Configuration Register

Models: CISCO1750

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Recovering a Lost Password

Recovering a Lost Password

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Recovering a Lost Password

This section describes how to recover a lost enable or enable secret password. The process of recovering a password consists of the following major steps:

•Changing the Configuration Register

•Resetting the Router

•Resetting the Password (for lost enable secret passwords only)

•Resetting the Configuration Register Value

Note See the “Hot Tips” section on Cisco Connection Online (CCO) for additional information on replacing enable secret passwords.

Changing the Configuration Register

Follow these steps to change the configuration register:

Step 1 Connect an ASCII terminal or a PC running a terminal-emulation program to the console port on the rear panel of the router. Refer to the section “Connecting a PC” in the “Installation” chapter.

Step 2 Configure the terminal to operate at 9600 baud, 8 data bits, no parity, and 1 stop bit.

Step 3 Reboot the router by pressing the power switch to the off position, and then to the on ( ) position.

Cisco 1750 Router Hardware Installation Guide

ii	78-6169-02

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Cisco Systems CISCO1750 manual Recovering a Lost Password, Changing the Configuration Register

Contents

Cisco 1750 Router Hardware Installation Guide Corporate HeadquartersCisco Systems, Inc 170 West Tasman Drive San Jose, CA 800 553-NETS 6387 Fax 408Turn the television or radio antenna until the interference stops Move the equipment farther away from the television or radioCisco 1750 Router Hardware Installation Guide Copyright 2005 Cisco Systems, Inc. All rights reservedPage Key Features InstallationBefore Installing the Router Connecting the Router to Your Local NetworkTroubleshooting Troubleshooting WICs and VICsEthernet Network Cabling Guidelines B-ii Console Cable and Adapters B-iii VIC Cables and Pinouts B-vInstalling a Mini-Flash Module C-vi Installing a Dual In-Line Memory Module C-ixInstalling a Packet Voice Data Module C-x Locating Modules C-v78-6169-02 viiiContents Cisco 1750 Router Hardware Installation Guide About This Guide Related Publications Audience and ScopeOrganization Conventions Notes, Cautions, and WarningsPage xiii ¡Atención! Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentesCommands boldfaceboldface screen font DescriptionCisco 1750 Router Overview Key Features Rear-Panel Ports and LEDs Front-Panel LEDs Router MemoryUnpacking the Router Additional Required Equipment Figure 1 shows the Cisco 1750 routerKey Features Cisco interface cards Rear-Panel Ports and LEDs Rear-Panel ConnectorsRear Panel LEDs Rear-Panel Connectors continuedLabel/Color Front-Panel LEDs Rear Panel LEDs continuedFigure 3 Front-Panel LEDs Front-Panel LEDsCards ColorSupported LED MeaningCards ColorSupported LED MeaningRouter Memory Types of Memoryof memory Amounts of Memory1750# show version Unpacking the Router Additional Required EquipmentWhen You Use It Equipmenttypes, refer to the Cisco WAN Interface Cards Hardware EquipmentInstallation Before Installing the RouterConnecting the Router to Your Local Network Follow these steps to connect the router to your local network Figure 1 Connecting the Router to the Local Network Ethernet hub or switch 10, 100, or 10/100 MbpsINSTALLATION ONLY VOINSTALLATIONInstalling WICs and VICs Safety InformationFollow these steps to remove and insert a card in the router Step 3 Remove the metal plate that covers the card slot Connecting Power to the Router Warning The power supply is designed to work with TN power systemsviii Figure 3 Inserting a WIC or VIC in the RouterStep 4 Press the router power switch to on Verifying Your Installation Optional Installation StepsConnecting a PC Figure 5 Connecting the Console Cable to the Router Light blueConsole port console cableConnecting a Modem xiiiWall-Mounting 78-6169-02 Optional Installation StepsCisco 1750 Router Hardware Installation Guide 78-6169-02 Optional Installation StepsCisco 1750 Router Hardware Installation Guide Troubleshooting Contacting Cisco or Your ResellerRecovering a Lost Password Changing the Configuration RegisterStep 6 Record the break setting Break enabled-bit 8 is set to Break disabled default setting-bit 8 is set toConfiguration register is Router show versionResetting the Router Resetting the Password Problem Solving Resetting the Configuration Register ValueMeaning OK LED DiagnosticsNumber of Blinks viii Troubleshooting WICs and VICsUse the show diag command to help determine problems with a card The Cisco WAN Interface Cards Hardware Installation Guide SymptomPossible Solutions Troubleshooting the Power System Compliance and Safety Information for the Cisco 1600 andTroubleshooting ISDN Troubleshooting the Power SystemSymptom Possible SolutionsTroubleshooting ISDN Check the FollowingUse the isdn switch-type Use show isdn statusUse the show controller bri0 Troubleshooting ISDN continuedProblem Solving Cisco 1750 Router Hardware Installation Guide 78-6169-02Technical Specifications Power consumption Operating SpecificationsOperating temperature Storage temperatureCabling Specifications Ethernet CablesEthernet Cabling Guidelines Ethernet Network Cabling GuidelinesStraight-Through Ethernet Cable RJ-45-to-RJ-45 Pinouts Console Cable and Adapters H10632 Table 3 Console Cable and Adapter Pinouts continuedFigure 1 Identifying a Rollover Cable VIC Cables and Pinouts Signal SignalDescription RJ-11 PinoutSignaling output Signaling groundE-lead return78-6169-02 VIC Cables and Pinouts Cisco 1750 Router Hardware Installation Guideviii Installing and Upgrading Memory and Data Modules Safety Information78-6169-02 Safety InformationCisco 1750 Router Hardware Installation Guide Opening the Chassis Figure 1 Removing the Chassis Screws Number 1 Phillips screwdriverRear panel Top of routerLocating Modules Figure 2 Cisco 1750 Motherboard-Module LocationsInstalling a Mini-Flash Module Removing a Mini-Flash Modulemini-Flash memory module release lever, as shown in Figure 45 degrees Figure 5 Installing a Mini-Flash Moduleviii Installing a Dual In-Line Memory Module Installing a Packet Voice Data Module Closing the Chassis INSTALLATION INSTALLATIONFigure 8 Closing the Chassis 22311I N D E Page Page Page