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Configure the Downstream Cable Interface
•
Install at least one Cisco MC11 cable modem card in the appropriate slot of Cisco uBR7246
chassis. For information about installing the Cisco MC11 cable modem card, refer to the
Cisco uBR7246 Universal Broadband Router Cable Modem Card Installation and Configuration
document.
Supported MIBs and RFCs
The Cisco uBR7246 universal broadband features support the RF Interface Management
Information Base (MIB). No RFCs are supported by this feature.
Universal Broadband Features Configuration Task List
The Cisco IOS software command-line interface (CLI) is used to configure the Cisco MC11 cable
modem card for correct operation on the HFC network. Perform the following tasks to configure the
MC11 cable modem card. For some tasks, the default values are adequate to configure the device;
these configuration tasks are optional.
•
Configure the Downstream Cable Interface (Optional)
•
Configure the Upstream Cable Interface
•
Configure and Activate Baseline Privacy
•
Configure and Activate Frequency Agility
•
Activate IP Address Resolution Protocol (Optional)
•
Activate Host-to-Host Communication (Proxy ARP) (Optional)
•
Set Optional IP Parameters (Optional)
•
Manage Cable Modems on the HFC Network (Optional)
Configure the Downstream Cable Interface
The first step in configuring the MC11 cable modem interface is to configure the downstream cable
interface. In this case, downstream refers to the data flow from the Cisco MC11 modem card in a
Cisco uBR7246 to the user's cable modem. Data passing through the MC11 cable modem card is
converted to IF and then run through an upconverter to transform the signal to RF. This RF signal is
then sent down the line to the user's cable modem. Downstream cable interface commands configure
the frequency, symbol rate, compression, and modulation of the downstream signal.
Perform the following tasks to configure the downstream cable interface:
•
Set the Downstream Center Frequency
•
Set the Downstream Symbol Rate
•
Set the Downstream MPEG Framing Format (Annex A or Annex B)
•
Set the Downstream Modulation
•
Set the Downstream Interleave Depth
•
Activate the Downstream Carrier
VC-138
Voice, Video, and Home Applications Configuration Guide