Installation Manual

4-13
Troubleshooting
Copying a Cisco IOS Image to Flash Memory
Maintenance
Enabling Booting from Flash Memory
To disable Break (after 60 seconds) and enable the boot system flash
command, enter the config-register command with the value shown in the
following example:
Router> enable
Password: enablepassword
Router# config term
Enter configuration commands, one per line.
Edit with DELETE, CTRL/W, and CTRL/U; end with CTRL/Z
config-reg 0x2102
^Z
Router#
Copying a Cisco IOS Image to Flash
Memory
You may need to copy a new Cisco IOS image to Flash memory whenever a
new image or maintenance release becomes available. Use the instructions on
page 1-6 to obtain the latest version. Use the copy tftp flash command for
the copy procedure.
Take the following steps to copy a new image to Flash memory:
1. Enter the show flash command to make sure there is enough space
available before copying a file to Flash memory. Compare the size of the
file you want to copy to the amount of available Flash memory displayed.
2. Make a backup copy of the current image.
3. Enter enable mode and then enter the copy tftp flash command to copy
the new image into Flash memory:
Router> enable
Password: enablepassword
Router# copy tftp flash
J3138.bk Page 13 Wednesday, March 18, 1998 6:07 PM