Cisco 7603 - Modular Expansion Base Installation Manual page 104

Troubleshooting Router Booting Issues
Table 4-1
Possible Problem
Incorrect or
corrupted image
(executive
command does
not function)
Cisco 7600 Series Routers Module Guide
4-4
Booting: Router Fails to Boot from Flash Memory
Solution
Check the configuration register using the show version
1.
command. Set the register to boot from Flash memory. For
information about configuration register settings, refer the
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.
After the correct image is identified, use the copy tftp flash
7.
privileged command at the router to retrieve the image.
Check the configuration register using the show version
8.
command. Set the register to boot from Flash memory.
Use the show running-config privileged command to see
9.
whether the router configuration contains the boot system
flash global configuration command.
Note: Using the copy running-config startup-config command
at this point on a Cisco 7600 series will overwrite the
configuration. Make sure that you have a backup of your
configuration file.
Include the boot system flash command, if it is not in the
10.
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.
This is the required syntax for the reload command:
reload [text] | [in [hh:]mm [text]] | [at hh:mm [month day
| day month] [text]] | [cancel]
Chapter 4 Troubleshooting
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