Cisco Systems GRP-B Boot Field Settings and the boot Command, Bit Hexadecimal Description

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Implementing Additional Configuration and Maintenance Tasks

Table 9	Software Configuration Register Bit Descriptions

Bit 1		Hexadecimal	Description
00 to 03		0x0000 to 0x000F	Boot field (see Table 10)

06		0x0040	System software ignores NVRAM contents

07		0x0080	OEM2 bit enabled
08		0x0100	Break disabled

09		0x0200	Use secondary bootstrap

10		0x0400	IP3 broadcast with all zeros
11 to 12		0x0800 to 0x1000	Console line speed (default is 9600 baud)

13		0x2000	Boot default Flash software if network boot fails

14		0x4000	IP broadcasts without network numbers

15		0x8000	Enable diagnostic messages and ignore NVRAM contents

1.The factory default value for the configuration register is 0x2102. This value is a combination of the following: binary bit 8 = 0x0100 and binary bits 00 through 03 = 0x0002 (see Table 10).

2.OEM = original equipment manufacturer

3.IP = Internet Protocol

Table 10 Boot Field Descriptions (Configuration Register Bits 00 to 03)

Boot Field	Description

00	Stays at the system bootstrap prompt.

01	Boots the first system image in onboard Flash memory.

02 to 0F	Specifies a default filename for booting over the network.
	Enables boot system commands that override the default filename.

Boot Field Settings and the boot Command

Bits 0 through 3 of the software configuration register form the boot field, specified as a binary number.

Note The factory default configuration register setting for systems and GRP spares is 0x2102.

Boot field—When the boot field is set to either 0 or 1 (0-0-0-0 or 0-0-0-1), the system ignores any boot instructions in the system configuration file and the following occurs:

•When the boot field is set to 0, you must boot the operating system manually by using the boot command to the system bootstrap program, or rom monitor.

or

•When the boot field is set to 1, the system boots the first image in the onboard bootflash single in-line memory module (SIMM).

Configuring the Software Configuration Register

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Contents Document Contents Gigabit Route Processor Installation and Configuration NoteGRP Redundancy Important InformationRouter Information Supported PlatformsGRP Functions Product OverviewCisco IOS Software Requirements Related DocumentationCisco IOS Software GRP ComponentsGRP Horizontal Orientation Type Memory ComponentsQuantity Description Location Flash Memory SramDisplay LEDs Soft Reset SwitchSystem Status LEDs Status LEDsAsynchronous Serial Ports Flash Card SlotsEthernet Port Safety Guidelines Preparing for InstallationTranslated Safety Warnings and Agency Approvals Europe EU Electromagnetic Compatibility Regulatory StatementsFCC Class a Compliance CanadaPreparing for Installation Working with Electrical Equipment Preventing Electrostatic DischargeClass a Notice for Korea Required Tools and Parts Replacing a GRPRemoving a GRP Shows the ejector levers To remove a GRP, follow these steps Turn off system power Installing a GRP Console Port Pin Signal Direction Description Connecting to the Console PortEthernet Interface Receptacles, Cables, and Pinouts Connecting to the Auxiliary PortConnecting to the Ethernet Port Signal Direction DescriptionRJ-45 Receptacle and Plug Horizontal Orientation Pin DescriptionMII Connections Pin Signal Input Output Input/Output DescriptionRJ-45 Ethernet Interface Cable Connection ProcedureConnecting MII or RJ-45 Cables to GRP Vertical Orientation Starting the System and Observing Initial Conditions GRP Boot Process OverviewLED Display Description ProcessorStarting the System and Observing Initial Conditions Verifying Interface Status GRP LEDs Partial Front Panel View Configuring the Ethernet InterfaceUsing Configuration Mode to Configure the Ethernet Interface Implementing Additional Configuration and Maintenance Tasks Configuring the Software Configuration RegisterBoot Field Description Boot Field Settings and the boot CommandBit Hexadecimal Description Changing Configuration Register Settings Action/File Name Bit Configuration Register Bit MeaningsBaud Bit Bit Address net hostFlash Disks and Flash Memory Cards in the GRP Installing and Removing Flash Memory Card or Flash Disk Formatting a Flash Memory Card or Flash Disk ATA Flash Disk Boot Image Support RequirementsRouter# format slot0 Software Commands Associated with Flash Memory Specifying Cisco IOS Image Used to Boot the SystemRouter# squeeze slot0 Enabling Booting from Flash MemoryRouter# copy tftpmyfile1 slot0myfile1 Copying Files to Flash MemoryRouter# 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 Locations of GRP Memory Components Upgrading GRP MemoryMEM-GRP/LC-64=2 Removing DIMMs Using Dimm Socket Release Lever to Remove DIMMsHandling a Dimm Installing New DIMMsObtaining Documentation Checking the Dimm InstallationCisco.com Cisco TAC Website Documentation FeedbackObtaining Technical Assistance Ordering DocumentationOpening a TAC Case Obtaining Additional Publications and InformationTAC Case Priority Definitions Obtaining Additional Publications and Information 78-4339-09