5-6
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
OL-32185-02
Chapter 5 ROM Monitor Overview and Basic Procedures
Displaying the Configuration Register Setting
Changing the prompt is useful if you are working with multiple routers in ROM Monitor at the same
time. This example specifies that the prompt should be “ISR4400 rommon ”, followed by the line
number, and then followed by “ > “ by the line number.
Displaying the Configuration Register Setting
To display the current configuration register setting, enter the confreg command without parameters as
follows:
rommon > confreg
Configuration Summary
(Virtual Configuration Register: )
enabled are:
console baud: 9600
boot: the ROM Monitor
do you wish to change the configuration? y/n [n]:
The configuration register setting is labeled Virtual Configuration Register. Enter the no command to
avoid changing the configuration register setting.
Environment Variable Settings
The ROM Monitor environment variables define the attributes of the ROM Monitor. Environmental
variables are entered like commands and are always followed by the equal sign (=). Environment
variable settings are entered in capital letters, followed by a definition. For example:
IP_ADDRESS=10.0.0.2
Under normal operating conditions, you do not need to modify these variables. They are cleared or set
only when you need to make changes to the way ROM Monitor operates.
This section includes the following topics:
• Frequently Used Environmental Variables, page 5-7
• Displaying Environment Variable Settings, page 5-7
• Entering Environment Variable Settings, page 5-8
• Saving Environment Variable Settings, page 5-8
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