Cisco Systems GRP-B manual Configuring the Software Configuration Register

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Implementing Additional Configuration and Maintenance Tasks

(Additional displayed text omitted from this example.)

Configuring interface Ethernet0:

Is this interface in use?: yes

Configure IP on this interface?: yes

IP address for this interface: 3.3.1.1

Number of bits in subnet field: 8

Class A network is 3.0.0.0, 8 subnet bits; mask is 255.255.0.0

Configure CLNS on this interface?: yes

Implementing Additional Configuration and Maintenance Tasks

This section contains information on the following additional configuration, troubleshooting, and maintenance tasks:

•Configuring the Software Configuration Register

•Flash Disks and Flash Memory Cards in the GRP

•Recovering Lost Password

•Upgrading GRP Memory

Configuring the Software Configuration Register

The system uses a 16-bit software configuration register, which allows you to set specific system parameters. Settings for the software configuration register are written into non-volatile random access memory (NVRAM).

Following are some reasons for changing the software configuration register settings:

•To select a boot source and default boot filename

•To enable or disable the Break function

•To control broadcast addresses

•To set the console terminal baud rate

•To load operating software from Flash memory

•To enable booting from a Trivial File Transfer Protocol (TFTP) server

•To recover a lost password

•To allow you to manually boot the system using the b command at the bootstrap program prompt

•To force an automatic boot from the system bootstrap software (boot image) or from a default system image in onboard Flash memory, and to read any boot system commands that are stored in the configuration file in NVRAM

Table 9 provides descriptions of each of the software configuration memory bits, and Table 10 defines the boot field, specified as a binary number that consists of bits 0 through 3 of the software configuration register.

Caution To avoid confusion and possibly halting the Cisco 12000 Series Router, remember that valid configuration register settings might be combinations of settings and not just the individual settings listed in Table 9. For example, the factory default value of 0x2102 is a combination of settings.

Implementing Additional Configuration and Maintenance Tasks

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Contents Gigabit Route Processor Installation and Configuration Note Document ContentsSupported Platforms Important InformationRouter Information GRP RedundancyRelated Documentation Product OverviewCisco IOS Software Requirements GRP FunctionsGRP Components Cisco IOS SoftwareGRP Horizontal Orientation Memory Components TypeQuantity Description Location Sram Flash MemoryStatus LEDs Soft Reset SwitchSystem Status LEDs Display LEDsFlash Card Slots Asynchronous Serial PortsEthernet Port Preparing for Installation Safety GuidelinesTranslated Safety Warnings and Agency Approvals Canada Electromagnetic Compatibility Regulatory StatementsFCC Class a Compliance Europe EUPreparing for Installation Preventing Electrostatic Discharge Working with Electrical EquipmentClass a Notice for Korea Replacing a GRP Required Tools and PartsRemoving a GRP Shows the ejector levers To remove a GRP, follow these steps Turn off system power Installing a GRP Connecting to the Console Port Console Port Pin Signal Direction DescriptionSignal Direction Description Connecting to the Auxiliary PortConnecting to the Ethernet Port Ethernet Interface Receptacles, Cables, and PinoutsPin Description RJ-45 Receptacle and Plug Horizontal OrientationPin Signal Input Output Input/Output Description MII ConnectionsEthernet Interface Cable Connection Procedure RJ-45Connecting MII or RJ-45 Cables to GRP Vertical Orientation GRP Boot Process Overview Starting the System and Observing Initial ConditionsProcessor LED Display DescriptionStarting the System and Observing Initial Conditions Verifying Interface Status Configuring the Ethernet Interface GRP LEDs Partial Front Panel ViewUsing Configuration Mode to Configure the Ethernet Interface Configuring the Software Configuration Register Implementing Additional Configuration and Maintenance TasksBoot Field Settings and the boot Command Boot Field DescriptionBit Hexadecimal Description Changing Configuration Register Settings Configuration Register Bit Meanings Action/File Name BitBit Address net host Baud BitFlash Disks and Flash Memory Cards in the GRP Installing and Removing Flash Memory Card or Flash Disk ATA Flash Disk Boot Image Support Requirements Formatting a Flash Memory Card or Flash DiskRouter# format slot0 Specifying Cisco IOS Image Used to Boot the System Software Commands Associated with Flash MemoryEnabling Booting from Flash Memory Router# squeeze slot0Copying Files to Flash Memory Router# copy tftpmyfile1 slot0myfile1Router# copy tftpnew.image slot0new.image Router# copy slot1image.new slot0image.new Router# config t Routerconfig# no boot system Router# copy startup-config slot0myfile2 Use the copy running-config slot0filename command as follows Recovering Lost Password Initialize the router by entering the i command as follows Upgrading GRP Memory Locations of GRP Memory ComponentsMEM-GRP/LC-64=2 Using Dimm Socket Release Lever to Remove DIMMs Removing DIMMsInstalling New DIMMs Handling a DimmChecking the Dimm Installation Obtaining DocumentationCisco.com Ordering Documentation Documentation FeedbackObtaining Technical Assistance Cisco TAC WebsiteObtaining Additional Publications and Information Opening a TAC CaseTAC Case Priority Definitions Obtaining Additional Publications and Information 78-4339-09