Installation guide
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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 2 Configuring the Cisco CMTS for the First Time
Using the Setup Facility for Cable Interfaces
Using the Setup Facility for Cable Interfaces
The setup facility creates an initial configuration. The basic management setup configures only enough
connectivity for management of the system; the extended setup prompts you to configure each interface
on the system.
To invoke the configuration facility, use the following command:
Router# setup
The following is the system configuration dialog:
Continue with configuration dialog? [yes/no]: yes
Interface Slot Numbering
For Cisco uBR7100 series components, the slot number is the chassis slot in which a port adapter or a
cable interface card is installed. The logical interface number is the physical location of the interface
port on a port adapter.
Numbers on a Cisco uBR7100 series router begin with 0 and are as follows:
• Slot 0—Fixed Fast Ethernet LAN interface
• Slot 1—Fixed cable modem card interface
• Slot 2—Not used
• Slot 3—Modular single-slot port adapter
• Slot 4—Not used
• Slot 5—Not used
Configuring the Interfaces
To configure the system, define the Cisco uBR7100 series interfaces, using the interface type slot/port
command, where:
• type—Cable, FastEthernet, and installed port adapter.
• slot—Slot number in chassis. Slot numbers begin with 0.
• sort—Port number on a cable modem card slot. Port numbers begin with 0.
Configuring the cable interface is particularly important because these components serve as the cable
TV RF interfaces. Configuration involves the following for each interface:
• Setting the downstream center frequency for the card to reflect the digital carrier frequency of the
downstream RF carrier (the channel) for that downstream port. To do this, enter the fixed center
frequency for your downstream RF carrier in Hz:
Router (config-int) # cable downstream frequency down-freq-hz
Note Make note of the correct value for the cable modem card. This provides useful information for
troubleshooting.