Cisco Systems RSP8 Enabling a Boot from Flash Memory

Route Switch Processor (RSP8) Installation and Configuration Guide

OL-4920-02

Reference Information

Bit8 controls the console Break key. Setting bit 8 (the factory default) causes the processor to ignore the

consoleBreak key. Clearing bit 8 causes the processor to interpret the Break key as a command to force

thesystem into the bootstrap monitor, thereby halting normal operation. Regardless of the setting of the

breakenable bit, a break causes a return to the ROM monitor during the first few seconds (approximately

5 seconds) of booting.

Bit 9 is unused. Bit 10 controls the host portion of the IP broadcast address. Setting bit 10 causes the

processor to use all zeros; clearing bit 10 (the factory default) causes the processor to use all ones. Bit

10 interacts with bit 14, which controls the network and subnet portions of the broadcast address.

Table12 shows the combined effect of bits 10 and 14.

Bits 11 and 12 in the configuration register determine the baud rate of the console terminal.Table 13

shows the bit settings for the four available baud rates. (The factory-set default baud rate is 9600.)

Bit 13 determines the server response to a bootload failure. Setting bit 13 causes the server to load

operating software from Flash memory after five unsuccessful attempts to load a boot file from the

network. Clearing bit 13 causes the server to continue attempting to load a boot file from the network

indefinitely. By factory default, bit 13 is cleared to 0.

Enabling a Boot from Flash Memory

To enable a boot from Flash memory, set configuration register bits 3, 2, 1, and 0 to a value between 2

and15 in conjunction with the boot system flash device:filename configurationcommand, where device

is bootflash:,slot0:, orslot1:, and filename is the name of the file from which you want to boot the

system.

To enter global configuration mode while in the system software image and specify a Flash memory

filename from which to boot, use theconfigure terminal privileged EXEC configuration command at

the enable prompt, as follows:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# boot system flash

device

filename

Table12 Conﬁguration Register Settings for Broadcast Address Destination

Bit 14 Bit 10 Address (<net> <host>)

Off Off <ones> <ones>

Off On <zeros> <zeros>

On On <net> <zeros>

On Off <net> <ones>

Table13 System Console Terminal Baud Rate Settings

Baud Bit 12 Bit 11

9600 0 0

4800 0 1

1200 1 0

2400 1 1