Information Technology Reference
In-Depth Information
Table 3-17 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table3-17
Booting: Router Is Stuck in ROM Monitor Mode
Possible Problem
Solution
Configuration
register setting is
incorrect
1.
At the ROM monitor prompt (>), enter
b
to boot the system.
2.
If a configuration exists in NVRAM, the system displays the
vacant message. Press the Enter key to continue.
If a configuration does not exist in NVRAM, the setup menu
appears. Skip the setup process.
Use the
show version
exec command to determine the
configuration register setting.
3.
Configuration
register setting is
incorrect
(continued)
4.
Look for an invalid configuration register setting. The
default is
0x101
, which disables the Break key and forces the
router to boot from ROM. A typical "bad" setting has a 0 in
the least significant bit (for example, 0x100).
For details about setting the configuration register, refer to your
hardware installation and maintenance publication.
Break key was
pressed during
boot process
At the ROM monitor prompt, enter
c
to allow the router to
continue booting.
Console cable was
inserted or
removed during
boot process, or
console was
power-cycled
during boot
process
1.
Press the Enter key and wait for the ROM monitor prompt
(>).
2.
If the ROM monitor prompt appears, enter
c
at the prompt to
continue the booting process.
Booting: Scrambled Output When Booting from ROM
Symptom:
When a user is booting from ROM, the router displays indecipherable text output on the
console.
