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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-03
Chapter2 Configuring the Cable Modem Termination System for the First Time
Configuration Fundamentals for the Cisco uBR7200 Series
DETAILED STEPS
Command or Action Purpose
Step1
Ensure that your network supports reliable
broadband data transmission.
Your plant must be swept, balanced, and certified based on
National Television Standards Committee (NTSC) or
appropriate international cable plant recommendations.
Ensure that your plant meets all Data-over-Cable Service
Interface Specifications (DOCSIS) downstream and
upstream radio frequency (RF) requirements. These
requirements are documented in the DOCSIS RF
Specifications:
http://www.cablemodem.com/specifications.html
Configuration information for downstream and upstream
interfaces is contained in Chapter3, “Configuring Cable
Modem Interface Features.”
Step2
Ensure that your Cisco uBR7200 series router is
installed in operational fashion.
Ensure that your Cisco uBR7200 series router is installed
according to the instructions in the hardware installation
guide that came with your CMTS (for example, the Cisco
uBR7200 Series Hardware Installation Guide on Cisco.com:
http://www.cisco.com/univercd/cc/td/doc/product/cable/
cab_rout/cr72hig/index.htm
Step3
Ensure that all other required headend or distribution
hub routing and network interface equipment is
installed, configured, and operational (based on the
supported services).
Headend installation requirements include:
• All routers
• Servers (Dynamic Host Configuration Protocol (DHCP),
TFTP, and time-of-day (ToD))
• Network management systems
• Other configuration or billing systems
• IP telephony equipment including gatekeepers and
gateways
• Backbone and other equipment if supporting VPN
Dial-up access servers, telephone circuits/connections and other
equipment if supporting telco return
Step4
Ensure that DHCP and DOCSIS configuration files
have been created and pushed to appropriate servers.
When initialized, each cable modem should be enabled to
perform the following tasks:
• Transmit a DHCP request
• Receive an IP address
• Obtain TFTP and ToD server addresses
• Download a DOCSIS configuration file or updated
software image if using CiscouBR924 cable access
routers or CiscouBR910 cable data service units (DSUs)
in your network.