Chapter 4 System Startup and Basic System Configuration

Manually Booting the System

Locating a Valid Cisco IOS Software Image

Use the following procedure to locate a Cisco IOS software image to manually boot the router from the ROM monitor prompt (rommon>).

Step 1 Enter the ROM monitor mode dir bootflash command to examine the contents of the onboard flash memory in NVRAM on the RP.

rommon

1> dir bootflash:

 

 

File size

Checksum

File name

3277967 bytes (0x32048f)

0x6b331e30

gsr-p-mz.120-7.4.5

rommon

2>

 

 

If the memory contains the desired Cisco IOS boot image, proceed to the “Booting from the Cisco IOS Software Image” section on page 4-12.

If the onboard flash memory does not contain the desired Cisco IOS boot image, proceed to the next step.

Step 2 Enter the dir slotn: command, where n represents either slot 0 (0) or slot 1(1) to find a valid image by examining the contents of the flash memory card.

The following example shows the contents of the flash memory card in slot 0:

rommon

2> dir slot0:

 

 

File size

Checksum

File name

3277967 bytes (0x32048f)

0x6b331e30

gsr-p-mz.120-7.4.5

rommon

3>

 

 

After you locate a valid boot image, proceed to the “Booting from the Cisco IOS Software Image” section on page 4-12.

Booting from the Cisco IOS Software Image

To boot an image manually, issue the appropriate ROM monitor mode boot command after locating a valid Cisco IOS software image. Boot the image using one of the boot commands shown in Table 4-3.

 

Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide

4-12

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Cisco Systems 12010 Locating a Valid Cisco IOS Software Image, Booting from the Cisco IOS Software Image, Dir bootflash