Cisco Systems C819HG4GVK9, C819GUK9 manual Entering the ROM Monitor

A P P E N D I X C

ROM Monitor

The ROM monitor firmware runs when the router is powered up or reset. The firmware helps to initialize the processor hardware and boot the operating system software. You can use the ROM monitor to perform certain configuration tasks, such as recovering a lost password or downloading software over the console port. If there is no Cisco IOS software image loaded on the router, the ROM monitor runs the router.

This appendix contains the following sections:

•Entering the ROM Monitor, page C-1

•ROM Monitor Commands, page C-2

•Command Descriptions, page C-3

•Disaster Recovery with TFTP Download, page C-3

•Configuration Register, page C-10

•Console Download, page C-12

•Debug Commands, page C-13

•Exiting the ROM Monitor, page C-14

Entering the ROM Monitor

To use the ROM monitor, you must be using a terminal or PC that is connected to the router over the console port.

Perform these steps to configure the router to boot up in ROM monitor mode the next time it is rebooted.

	Command	Purpose
Step 1
	enable	Enters privileged EXEC mode.
		Enter your password if prompted.
Step 2
	configure terminal	Enters global configuration mode.
Step 3
	config-reg 0x0	Resets the configuration register.

Cisco 819 Integrated Services Routers Software Configuration Guide

OL-18906-02 C-1