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Cisco 12000 Series Internet Router Configuration Guide for Cisco IOS Release 12.0S
Chapter 2 Basic Configuration of the Cisco 12000 Series Internet Router
PCMCIA Flash Memory Tasks
The new linear Flash memory card or Flash disk is now formatted and ready to use.
For complete command descriptions and configuration information, refer to the Configuration
Fundamentals Command Reference located at
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/fun_r/index.htm
or the Configuration Fundamentals Configuration Guide located at
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/fun_c/index.htm.
Booting from Flash Memory
To enable booting from a Cisco IOS software image file located on a PCMCIA Flash memory card or
Flash disk, follow these steps:
Command Purpose
Step 1
Router# format slot0:
or
Router# format disk0:
Formats a new Flash memory card or Flash disk located
in slot 0 on the RP. If the card or disk is located in slot 1,
use the slot1: or disk1: keyword.
Step 2
All sectors will be erased, proceed? [confirm] y
Confirms the card or disk format.
Step 3
Enter volume id (up to 30 characters): MyNewCard
Formatting sector n
Format device slot0 completed
Assigns the specified volume ID to the card or disk
(MyNewCard in this example). The console displays the
“Formatting sector n” line as the card or disk is being
formatted. When the count reaches 1, the formatting
process is complete.
Command Purpose
Step 1
Router# configure terminal
Enter configuration commands, one per line. End
with CNTL/Z.
Enters global configuration mode.
Step 2
Router(config)# boot system flash slot0:
filename
Specifies that at startup, the router loads the software
image named filename, located on the linear Flash
memory card in slot 0. Use slot1: for a Flash memory
card in slot 1, disk0: for a Flash disk in slot 0, and disk1:
for a Flash disk in slot 1.
Step 3
Router(config)# config-register 0x0102
Disables the Break function and enables the boot system
flash command.
Step 4
Router(config)# Ctrl-z
Exits global configuration mode.
Step 5
Router# copy running-config startup-config
or
Router# write memory
Saves the software configuration register settings to
NVRAM.
Step 6
Router# reload
Reboots the router and uses the specified image on the
Flash memory card inserted in PCMCIA slot 0 to boot
the system.
