Installation guide

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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 1 Overview
Cisco IOS Software Operational Overview
DOCSIS CPE Configurator
Cisco also offers an HTML-based DOCSIS CPE Configurator tool that can be accessed from Cisco.com.
The tool is designed to collect information needed to generate a DOCSIS CM configuration file. The
generated file is in binary format consistent with the DOCSIS RF Specification (SP-RFI-105-991105).
Cable Modem Configuration File Editor
The Cisco uBR7100 series routers support the cable config-file command, which provide for the online
creation of DOCSIS configuration files, which can then be stored on the router’s Flash memory or copied
to a TFTP server. The CLI commands to create these configuration files can be part of the Cisco IOS
configuration file that the router loads on power-up so that they are immediately available to cable
modems on the network.
Cisco IOS Software Operational Overview
The Cisco uBR7100 series router runs the IOS image that is located on the Type II Personal Computer
Memory Card International Association (PCMCIA) Flash memory disks. These disks are located in the
two PCMCIA slots in the primary Performance Routing Engine 1 (PRE1). A PCMCIA disk in either slot
can store a Cisco IOS image or configuration file.
In addition to the Flash memory disks, each PRE1 module contains onboard Flash memory that is used
to store a boot loader. The loader executes following a system reset to reload and execute the Cisco IOS
software on the Flash memory disks.
The PRE1 module also stores the system configuration in the onboard Flash memory. The configuration
information read from the Flash memory is buffered in operational memory following initialization, and
is written to the Flash memory device when you save the configuration.
Each line card also contains onboard Flash memory that is used to store a boot loader, similar in function to
that used on the PRE1 module. However, the line card loader executes following a system reset, line card
reset, or line card insertion to reload and execute any code that must run on the line card for it to operate
properly. Software images may also be stored on an external TFTP server. If the Cisco uBR7100 series router
is so configured, it then downloads the proper image from the TFTP server and executes it.
Cisco IOS Software Location
Cisco IOS software is stored on the PRE1 module, which includes two PCMCIA slots that are accessible
from the front panel. Either slot can store an IOS image or configuration file.
The Flash memory on the PRE1 module is used to store a simple ROM monitor or boot loader. The loader
executes following a system reset, line card reset, or line card insertion.
Line card images may also be stored in PRE1 module Flash memory or on an external TFTP server.
The PRE1 module stores the system configuration in a 512 KB NVRAM device. Configuration
information read from NVRAM is buffered in RAM following initialization and is written to the device
when you save the configuration.
Determining Your Cisco IOS Software Release
To determine the version of Cisco IOS software running on the Cisco uBR7100 series router, log in to
the router and enter the show version command in privileged EXEC mode. For example:
Router> show version
Cisco Internetwork Operating System Software
IOS (tm) 12.2 XF Software (ubr10k-k8p6-mz), Version 12.2 XF, RELEASE SOFTWARE