Cisco Systems ISR4451XK9 manual Entering ROM Monitor Mode, Checking the Current ROMmon Version

Chapter 5 ROM Monitor Overview and Basic Procedures

Entering ROM Monitor Mode

Administration EXEC mode as needed. Typically, you set the configuration register using the

Cisco IOS XE software prompt when you need to use ROM Monitor mode. When the maintenance in ROM Monitor mode is complete, you change the configuration register so the router reboots with the Cisco IOS XE software.

Accessing ROM Monitor Mode with a Terminal Connection

When the router is in ROM Monitor mode, you can access the ROM Monitor software only from a terminal connected directly to the console port of the card. Because the Cisco IOS XE software (EXEC mode) is not operating, the nonmanagement interfaces are not accessible. Basically, all

Cisco IOS XE software resources are unavailable. The hardware is there, but no configuration exists to make use of the hardware.

Network Management Access and ROM Monitor Mode

Checking the Current ROMmon Version, page 5-2. Some people get confused when they start to use ROM Monitor mode. It is important to remember that ROM Monitor mode is a router mode, not a mode within the Cisco IOS XE software. It is best to remember that ROM Monitor software and the

Cisco IOS XE software are two separate programs that run on the same router. At any given time, the router is running one of these programs, but it never runs both at the same time.

One area that can be confusing when using ROM Monitor and the Cisco IOS XE software is the area that defines the IP configuration for the Management Ethernet interface. Most router users get comfortable with configuring the Management Ethernet interface in the Cisco IOS XE software. When the router is in ROM Monitor mode, however, the router is not running the Cisco IOS XE software, so that Management Ethernet interface configuration is not available.

When you want to access other devices, such as a TFTP server, while in ROM Monitor mode on the Cisco 4451-X ISR, you must configure the ROM Monitor variables with IP access information.

Entering ROM Monitor Mode

The following sections describe how to enter the ROMMON mode, and contains the following sections:

•Checking the Current ROMmon Version, page 5-2

•Commonly Used ROM Monitor Commands, page 5-4

•Displaying the Available ROM Monitor Commands, page 5-4

•Changing the ROM Monitor Prompt, page 5-5

Checking the Current ROMmon Version

To display the version of ROMmon running on a router, use the show rom-monitorcommand or the show platform command.

Router# show rom-monitor r0

Router#show rom-monitor r0

System Bootstrap, Version 12.2(20120829:165313) [jhayduk-ESGROM_20120829_DELTA 101], DEVELOPMENT SOFTWARE

Copyright (c) 1994-2012 by cisco Systems, Inc.

Router#show platform

Chassis type: ISR4451/K9

Hardware Installation Guide for the Cisco 4451-X Integrated Services Router

5-2