Routing
Bridging and Routing Features for the Cisco uBR924 Cable Access Router 5
Routing
The Cisco uBR924 cable access router can also be configured to act as a router to preserveIP address
space and limit broadcasts that can impact the performance of the network. A typical use would be
if you are connecting the cable access router to an internal Ethernet hub that is connected to an
existing PC network. You can also connect the cable access router directly to as many as four PCs
via the Ethernet ports on the rear panel.
The cable access router is automatically configured to use the IP address of the Cisco headend cable
router as the cable access router’s default IP gateway.
Figure 5 Cisco uBR924 in a Routing Configuration with a Hub
You can configure the Cisco uBR924 cable access router to function as a router by using one of the
following methods:
• By using TFTP to download a configuration file from the headend router to the cable access
router that automatically configures it for routing.
• By connecting an ASCII terminal or PC to the console port on the back of the cable access router
and using the CLI. See the sections “Configuring a Host Name and Password” on page 12 and
“Customizing the Cable Access Router Interface” on page 19 for details
Benefits
The Cisco uBR924 cable access router provides the following benefits for data-over-cable
applications:
• Allows telecommuters and small office/home office customers to leverage the high-bandwidth,
low-cost, IP-based data and voice services offered by cable operators
• Enables the cost-effective deployment of advanced routing capabilities to the small office or
home office site
• Prioritizes voicetrafficahead of data traffic,ensuring quality of service (QoS) overa shared cable
infrastructure
• Leverages Cisco’s industry-standard routing hardware and Cisco IOS software to deliver
advanced networking services and applications such as virtual private networks (VPNs), support
for multi-protocol networks, firewall security,and the ability to cost-effectivelydeploy local area
networks (LANs)
CATV
coaxial cable
Cable
Modem
Ethernet Ethernet
HUB
LAN
13306
Cisco uBR7246
CMTS
HFC network
