User's Manual

Table Of Contents
Recovery from BTS Router Boot to ROMMON
I-78 1X SC 4812T Lite BTS Optimization/ATP FEB 2005
PRELIMINARY
Introduction
ROM Monitor Boot Conditions
Under certain circumstances the BTS Router will initialize with the
ROM Monitor (ROMMON) Operating System rather than the IOS.
These circumstances include:
S IOS File is missing from the CF Memory Card
S IOS File is not the first file on the CF Memory Card
S IOS File image on the CF Memory Card is corrupt
S Start–up–config File contains an outdated Boot System Line
specifying an IOS File that has been replaced with an updated version
S Start–up–config file contains Boot System Line with typographical
error(s) in the IOS Filename
Description
Router Operation on ROMMON is signalled by the display of the
rommon # > Prompt, where # is a number that increments each time a
command is issued. ROMMON is a low–level Operating System that
provides limited capabilities for Router testing and troubleshooting
operations, but does not support any operations on files beyond viewing
directory contents or booting from a specified file. As a result, files can
not be copied or deleted when the BTS Router is operating on
ROMMON.
Recovery Methods
Two recovery methods are included in this section.
1. The first is the simplest and requires that a valid, uncorrupted IOS
Version is installed on the CF Memory Card.
2. The second method requires additional equipment and must be used
in instances such as when an IOS File is not installed on the CF
Memory Card or the installed IOS Image is corrupted..
Simple Recovery from Boot to
ROMMON
Requirements
Unless it is certain, that the IOS Image on the CF Memory Card is
corrupted, this method should always be the first attempted to recover
the BTS Router from a ROMMON Initialization.
This method does not require any additional equipment beyond the
items necessary to load Canned Configuration Files into the BTS
Router.
To be effective, this method does require that a valid, uncorrupted
IOS Image file is installed on the BTS Routers CF Memory Card..
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