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Bridging and Routing Features for the Cisco uBR924 Cable Access Router 7
Supported Platforms
The Cisco uBR924 cable access router is a standalone device; it works in conjunction with the
Cisco uBR7246 and the Cisco uBR7223 universal broadband routers.
Prerequisites
In order to use the Cisco uBR924 cable access router for data-over-cable applications, the following
tasks must be completed:
• All required CMTS routers, servers (DHCP, TFTP and TOD), network management systems,
and/or other configuration or billing systems to be used in your network must be installed,
configured, and operational. If you are using a Cisco uBR7246 or uBR7223 universal broadband
router at the cable headend, refer to the Cisco uBR7246 Installation and Configuration Guide or
the Cisco uBR7223 Installation and Configuration Guide for detailed information.
• Based on the quality and capacity of your cable plant, your system administrator or network
planner must define your network’s IP address allocation plan; spectrum management plan
outlining the recommended operating parameters to optimize performance; channel plan
identifying the channels available to assign to specific Cisco uBR924 cable access routers; and
dial plan based on the supported VoIP protocol.
• The CMTS system administrator or appropriate personnel must specify the policy parameters for
the Cisco uBR924 and all computers and other customer premises devices to be supported at
subscriber sites. Refer to Cisco’s Network Registrar (CNR) product documentation.
• The CMTS system administrator or appropriate personnel must define and push DHCP and
Cisco uBR924 configuration files to the appropriate servers such that each router, when
initialized, can transmit a DHCP request, receive its IP address, obtain its TFTP and TOD server
addresses, and download its configuration file or updated Cisco IOS image.
Note The MAC address ensures that each router downloads only the file(s) intended for it.
• The Cisco uBR924 cable access router must be physically installed and cabled as follows:
— To the headend via CATV coaxial cable. (High-quality, shielded RF coaxial cable with at
least 80% braid is recommended.)
— To at least one PC via the straight-through yellow Ethernet cable supplied with the cable
access router. Refer to the Cisco uBR924 Cable Access Router Quick Start Guide for detailed
information.
Note When the Cisco uBR924 is connected to an Ethernet hub, a crossover cable must be used.
Category 5 UTP (10BaseT Ethernet) cable with RJ-45 connectors is recommended.
Note For subscriber sites that support multiple telephones or fax devices on a telephone line, all
wiring associated with the telephone line extension must be in place. Inside wiring must be in
compliance with the country of operation to prevent degradation of service.