System information

Troubleshooting Hardware and Booting Problems 3-53
Booting: Router Hangs After ROM Monitor Initializes
Table 3-18 Booting: Undefined Load Module Error When Netbooting
Booting: Router Hangs After ROM Monitor Initializes
Symptom: When a user is booting a Cisco 7000 series, AGS+, AGS, ASM-CS, MGS, IGS, or CGS
router from ROM, the system hangs after the ROM monitor initializes.
Table 3-19 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table 3-19 Booting: Router Hangs After ROM Monitor Initializes
Possible Problem Solution
Filename mismatch
Step 1 If you are booting manually, refer to the user guide for your router to see the
proper command-line format.
Step 2 Check the router configuration file. Compare the filename specified in the boot
system filename [address] global configuration command entry with the actual
router image filename. Make sure they match.
Step 3 If the filenames differ, change the name in the configuration file.
Remember to use the router image filename in the boot system global
configuration command specification and the configuration filename with the boot
host and boot network global configuration commands.
Possible Problem Solution
Incorrect EPROM
1
size setting
1 EPROM = erasable programmable read-only memory
Step 1
Power down the system.
Step 2 Inspect EPROM size jumpers. Refer to the hardware installation and
maintenance publication for your router to determine the proper setting.
Step 3 Move jumpers as required.
Configuration register
is not set correctly
Step 1 Check your configuration settings (boot ROM jumpers and software
configuration). If no jumper is set at bit 0, and no other boot field is defined,
you must reconfigure your system so that it can boot properly.
Step 2 To enable your router to boot properly, do one of the following:
• Configure the software configuration register of the router using the
config-register value global configuration command. (This applies to the
IGS, Cisco 2500, Cisco 3000, and Cisco 7000 platforms running Cisco IOS
Release 10.0 or later in the EPROM.)
• Set the boot ROM jumper to permit booting.
• Include the correct boot system global configuration commands to boot the
system.
• Set bit 0 to a value of 1 to force booting from ROM.
Refer to the Cisco IOS configuration guides and command references, as well as your
hardware installation and maintenance publications, for more information about
configuring your router for the various booting options.