Specifications

Prerequisites
4
Cisco IOS Release 12.0(3)T
Prerequisites
In order to use the Cisco uBR904 cable modem for data-over-cable applications, the following
conditions must be met:
• The Cisco uBR7246 universal broadband router must be installed at the cable headend and
configured. Refer to the Cisco uBR7246 Installation and Configuration Guide and the
Cisco uBR7246 Universal Broadband Router Cable Modem Card Installation and Configuration
for detailed information.
• The Cisco uBR904 cable modem must be physically installed and cabled as follows:
— To the headend via CATV coaxial cable
— To at least one PC via the straight-through yellow Ethernet cable supplied with the cable
modem. Refer to the Cisco uBR904 Cable Modem Installation and Configuration Guide for
detailed information.
• The PC(s) connected to the Cisco uBR904 cable modem must be configured for IP.
• The cable service provider must have a correctly configured network DHCP server and
Electronic Industries Association (EIA) downstream channel.
• Cisco IOS Release 11.3(4)NA or later must be running on the Cisco uBR904 cable modem.
When the cable modem is up and running, you can display the IOS release number by entering
the show version command from user EXEC mode.
Note If the Cisco uBR7246 universal broadband router at the cable headend is using MC16 modem
cards, Cisco IOS Release 11.3(7)NA or later must be running on the Cisco uBR904 cable modem.
Supported MIBs and RFCs
The Cisco uBR904 cable modem supports the following:
• Cisco Standard MIBs: Cisco Product MIB, Cisco Chassis MIB, Cisco Syslog MIB, Cisco Flash
MIB, Bridge MIB, IF MIB, MIB-II.
• Radio Frequency Interface Specification—Developed by the Multimedia Cable Network System
(MCNS) consortium. It defines the radio-frequency interface specification for high-speed
data-over-cable systems.
• CiscoWorks—Network management program for planning, troubleshooting, and monitoring
Cisco internetworks. CiscoWorks uses Simple Network Management Protocol (SNMP) to
monitor all SNMP devices.
— For more information about CiscoWorks on CCO, follow this path:
Products & Ordering: Cisco Products: Network Management: CiscoWorks
— For more information about CiscoWorks on the Documentation CD-ROM, follow this path:
Cisco Product Documentation: Network Management: CiscoWorks
• Radio Frequency Interface (RFI) MIB—Specific to Data-Over-Cable Service Interface
Specification (DOCSIS) cable implementations. The RIF MIB provides an interface that permits
management of the Cisco uBR904 cable modem over the cable or Ethernet interface. Using
SNMP management applications, this MIB allows access to statistics such as MAC, driver
configuration, and counters.