Cisco Systems 806, 830 User Manual

Cisco 806, Cisco 820 Series, Cisco 830 Series,
SOHO 70 Series and SOHO 90 Series Routers
ROM Monitor Download Procedures

November 18, 2004

This document contains procedures for downloading ROM Monitor (ROMMON) software upgrade
images. A ROMMON upgrade is required if you are upgrading Cisco 828, Cisco 830 Series, and SOHO
90 Series router to Cisco IOS Release 12.3(8)YA or later to take advantage of the IOS “No service
password recovery” feature. If you have purchased a Cisco 828, Cisco 830 Series, or SOHO 90 Series
router with a Cisco IOS Release 12.3(8)YA or later image already installed, you do not need to install a
ROMMON upgrade image.

A ROMMON upgrade image is also required if you are upgrading Cisco IOS 827-4V Voice images to
Cisco IOS Release 12.2(2)XK or later. If you have purchased a Cisco 827-4V router with a Cisco IOS
Release 12.2(2)XK or later image already installed, you do not need to install a ROMMON upgrade
image.

Caution If you are downloading a C820 Cisco IOS image with the Voice software feature, you must first

upgrade to ROMMON upgrade image version 12.2(4r)XM2 or later before you download and run the
IOS image on your Cisco 827-4V router. Failure to do so will cause the router to operate improperly
and enter into an unrecoverable state.

This document contains the following sections:

• Supported Platforms

• Important Notes

• Downloading Images

• Obtaining Documentation and Submitting a Service Request, page 5

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Supported Platforms

Supported Platforms

While the Cisco 827-4V is currently the only router requiring a ROMMON upgrade image, and the IOS
“No service password recovery” feature introduced with Cisco IOS Release 12.3(8)YA is the only reason
to upgrade Cisco 828, Cisco 830 Series, and SOHO 90 Series ROMMON images, ROMMON upgrade
images are supported on the following routers.

• Cisco 806

• Cisco 826

• Cisco 827

• Cisco 827-4V

• Cisco 828

• Cisco 831

• Cisco 836

• Cisco 837

• SOHO 71

• SOHO 76

• SOHO 77

• SOHO 78

• SOHO 91

• SOHO 96

• SOHO 97

Important Notes

The 827-4V Cisco IOS images available on Cisco IOS Release 12.2(2)XK and later require the use of a
ROMMON upgrade image version 12.2(1r)XE2 or later. Attempting to run Release 12.2(2)XK or later
IOS Voice images with an earlier ROMMON image installed will cause the router to operate improperly
and enter into an unrecoverable state. In order to prevent this from occurring, download a ROMMON
upgrade image version 12.2(4r)XM2 or later from the CCO website onto a TFTP server, and then load
it onto the router before running the new IOS image. These ROMMON images are backward compatible
with all Cisco IOS images released for the Cisco 827-4V router.

Installing a ROMMON upgrade image on other routers in the supported platform list may allow you to
take advantage of software enhancements included in later ROMMON images and Cisco IOS releases.
In particular, there is a potential for an intermittent hang after using the reload command that is
eliminated by installing a ROMMON upgrade. Further, the IOS “No service password recovery” feature,
introduced with Cisco IOS Release 12.3(8)YA for Cisco 820, Cisco 830 Series, and SOHO 90 Series
routers requires a ROMMON upgrade.

Cisco 806, Cisco 820 Series, Cisco 830 Series, SOHO 70 Series and SOHO 90 Series Routers ROM Monitor Download Procedures

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