Information Technology Reference
In-Depth Information
Table3-7
Booting: Router Fails to Boot from Flash Memory
Possible Problem
Solution
Incorrect or
corrupted image
(exec does not
function)
1.
Check the configuration register using the
show version
exec command. Set the register to boot from Flash memory.
For information about configuration register settings, refer
to your hardware installation and maintenance
documentation.
2.
Power-cycle the router.
3.
Within the first 60 seconds of booting, press the Break key
to access the ROM monitor.
4.
At the ROM monitor prompt (>), enter
o/r 0x1
to set the
configuration register to boot from ROM.
5.
Enter
i
to reinitialize the router, which causes the router to
enter setup mode.
6.
Obtain the correct system image. If necessary, contact your
technical support representative to determine which image is
correct.
7.
After the correct image is identified, use the
copy tftp flash
privileged exec command at the router to retrieve the image.
8.
Check the configuration register using the
show version
exec command. Set the register to boot from Flash memory.
9.
Use the
show running-config
privileged exec command to
see whether the router configuration contains the
boot
system flash
global configuration command.
Note:
Issuing the
copy running-config startup-config
command at this point on a Cisco 2500, Cisco 3000, Cisco 4000,
or Cisco 7000 series will overwrite the configuration. Make sure
that you have a backup of your configuration file.
10.
Include the
boot system flash
command, if it is not in the
configuration. Be sure to use the
copy running-config
startup-config
command after this change.
11.
Enter the
reload
privileged exec command to restart the
router.
Syntax:
The following is the syntax for the
reload
command:
reload [text]
|
[in [hh:]mm [text]]
|
[at hh:mm [month day
|
day month] [text]]
|
[cancel]
continues
