Cisco Systems UBR900 User Manual
Cisco IOS Software Feature Sets
Configuring the Cisco uBR900 Series Cable Access Routers 3
Base IP Bridging
Base IP Bridging includes full and DOCSIS-compliant bridging and DOCSIS Baseline Privacy. The
Base IP Bridging feature set allows the Cisco uBR900 series cable access router to function as a
DOCSIS 1.0 cable modem and to interoperate with any DOCSIS 1.0-qualified CMTS. It provides
basic high-speed Internet connectivity for users who want to connect only one computer to the cable
network.
Base IP Bridging feature set allows the Cisco uBR900 series cable access router to function as a
DOCSIS 1.0 cable modem and to interoperate with any DOCSIS 1.0-qualified CMTS. It provides
basic high-speed Internet connectivity for users who want to connect only one computer to the cable
network.
DOCSIS-compliant bridging (also referred to as “plug-and-play” bridging) is the default
configuration for Cisco uBR900 series cable access routers. While in plug-and-play bridging mode,
the router locates a downstream and upstream channel; finds ToD, TFTP, and DHCP servers; obtains
an IP address; downloads a DOCSIS configuration file; and obtains DHCP parameters to work in
bridging mode.
configuration for Cisco uBR900 series cable access routers. While in plug-and-play bridging mode,
the router locates a downstream and upstream channel; finds ToD, TFTP, and DHCP servers; obtains
an IP address; downloads a DOCSIS configuration file; and obtains DHCP parameters to work in
bridging mode.
Note
This feature set does not include Easy IP and Routing.
In DOCSIS-compliant bridging mode, the Cisco uBR900 series cable access router acts as a
transparent bridge for the following device combinations:
transparent bridge for the following device combinations:
•
3 CPE devices when using Cisco IOS Release 12.0(4) XI1 or higher
•
254 CPE devices when using Cisco IOS Release 12.0(5)T or higher images, or Cisco IOS
Release 12.1.
Release 12.1.
Note
The ability of the Cisco uBR900 series cable access router to grant access to CPE devices is
controlled by the MAX CPE field in the DOCSIS configuration file. The MAX CPE field defaults
to one CPE device unless otherwise set to a higher number.
to one CPE device unless otherwise set to a higher number.
Home Office (Easy IP)
The Home Office feature set provides high-speed Internet connectivity for customers who have a
small home network (typically 2-4 computers). In addition to full DOCSIS 1.0 support and all of the
functionality of the Base IP Bridging feature set, the Home Office feature set (also known as Easy
IP) supports intelligent Dynamic Host Configuration Protocol (DHCP) server functions, including
DHCP Relay Agent and DHCP Client functionality. It also supports Easy IP (NAT/PAT).
small home network (typically 2-4 computers). In addition to full DOCSIS 1.0 support and all of the
functionality of the Base IP Bridging feature set, the Home Office feature set (also known as Easy
IP) supports intelligent Dynamic Host Configuration Protocol (DHCP) server functions, including
DHCP Relay Agent and DHCP Client functionality. It also supports Easy IP (NAT/PAT).
This feature set allows the Cisco uBR900 series cable access router great flexibility in administering
IP addresses for the PCs and other customer premises equipment it is connecting to the cable
network. The DHCP functionality allows intelligent use of the IP addresses that allow customer
premises computers and other equipment to connect to the Internet. The NAT/PAT functionality
allows you to use private IP addresses on the local network, while still maintaining connectivity to
the Internet.
IP addresses for the PCs and other customer premises equipment it is connecting to the cable
network. The DHCP functionality allows intelligent use of the IP addresses that allow customer
premises computers and other equipment to connect to the Internet. The NAT/PAT functionality
allows you to use private IP addresses on the local network, while still maintaining connectivity to
the Internet.
Small Office
In addition to full DOCSIS 1.0 support and all of the functionality of the Easy IP feature set, the
Small Office feature set supports the Cisco IOS firewall feature set which provides a wide range of
security features for Cisco uBR900 series cable access routers. Using the firewall feature set,
Cisco uBR900 series cable access routers act as buffers between the customer’s private enterprise
network and the Internet and other connected public networks.
Small Office feature set supports the Cisco IOS firewall feature set which provides a wide range of
security features for Cisco uBR900 series cable access routers. Using the firewall feature set,
Cisco uBR900 series cable access routers act as buffers between the customer’s private enterprise
network and the Internet and other connected public networks.