Entering The Cisco 4000-M Rom Monitor Program; Table C-1 O Command Options - Cisco EF4116 Hardware Installation And Maintenance Manual

4000 series

Table of Contents

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Display/Reset Virtual Configuration Register—The o command displays the virtual

configuration register. The o command used with the /r option will reset the configuration

information (sets the ignore NVRAM contents bit, 0x0040). To reset to the default, enter the

following at the > prompt:

o/r

Table C-1 lists additional o command options.

Table C-1

O Command Options

Monitor

Command

Function

Displays the virtual configuration register currently in effect, with a description of the bits

o/r

Resets the virtual configuration register to the defaults as follows:

9600 baud console UART speed

Break/abort has no effect

Ignore the system configuration

Boot from ROM

o/r 0xvalue

Sets the virtual configuration register to the (hex) value, value

Enter the i command after entering the o/r command to automatically reboot the router.

Note

To enable the router to read the configuration file in nonvolatile RAM, clear the ignore

NVRAM contents bit (0x0040) with the config-register command after using the o/r command.

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Memory/Bus Diagnostic—The t m command runs the memory test. By default, the memory test

examines processor main memory.

It is good practice for you to save the configuration in a file on a host in your network as

Caution

a backup before testing because the file could be lost.

To test memory, enter the t command with the m option at the > prompt, as follows:

t m

To use the default addresses and select the default tests, press the Return key after each prompt

displays.

The time to run a diagnostic is memory size dependent. It will take a minimum of 10 minutes. If the

program encounters memory problems, it will display appropriate error messages on the console

terminal. Be sure to reinitialize the processor before booting the system by entering i at the ROM

monitor prompt.