Installation guide

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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide

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Chapter 2 Configuring the Cisco CMTS for the First Time

Configuring the Cisco uBR7100 Series CMTS Using AutoInstall

The AutoInstall process is designed to configure the Cisco uBR7100 series CMTS automatically after

connection to your WAN. For AutoInstall to work properly, a Transmission Control Protocol/Internet

Protocol (TCP/IP) host on your network must be preconfigured to provide the required configuration

files. The TCP/IP host can exist anywhere on the network as long as the following two conditions are

maintained:

• Host must be on the LAN or WAN side of the router’s port adapter connection to the WAN.

• User Datagram Protocol (UDP) broadcasts to and from the router and the TCP/IP host are enabled.

This functionality is coordinated by your system administrator at the site where the TCP/IP host is

located. You should not use AutoInstall unless the required files are available on the TCP/IP host. See

the publications Configuration Fundamentals Configuration Guide and Configuration Fundamentals

Command Reference for more information about AutoInstall.

Complete the following steps to prepare your Cisco uBR7100 series CMTS for the AutoInstall process:

Step 1 Attach the appropriate synchronous serial cable to the synchronous serial interface 0 on the router.

Step 2 Turn the power switch on each power supply to the ON (|) position. This action turns on power to the

router.

The router loads the operating system image from Flash memory; this process can take several minutes.

If the remote end of the WAN connection is connected and properly configured, the AutoInstall process

begins.

Step 3 When the AutoInstall process is completed, use the copy running-config startup-config command to

write the configuration data to the router’s nonvolatile random-access memory (NVRAM):

Router# copy running-config startup-config

Completing this step saves the configuration settings that the AutoInstall process created to NVRAM. If

you fail to do this, your configuration will be lost the next time you reload the router.

Configuring Using the setup Facility

The Cisco uBR7100 series setup facility is a useful and efficient tool for configuring your CMTS. The

setup facility supports the following functionalities so that cable interfaces and cable modem cards are

fully operational (after initial setup):

• Cable-specific commands

• Upstream frequency definition

For each cable interface, the following information is mandatory:

Per upstream:

cable upstream n frequency f

no cable upstream n shutdown

Options include definition of the following information:

• DHCP server address.

• Options are also provided to set downstream frequency for the up-converter per interface.