Cisco Systems UBR900 specifications Customizing the Cable Access Router Interface

Customizing the Cable Access Router Interface

voice-port 0

!

!

voice-port 1

!

!

interface Ethernet0 no ip address

no ip directed-broadcast no ip route-cache bridge-group 59

bridge-group 59 spanning-disabled

!

interface cable-modem0 no ip address

no ip directed-broadcast no ip route-cache

no keepalive

cable-modem downstream saved channel 699000000 36 bridge-group 59

bridge-group 59 spanning-disabled

!

ip classless

no ip http server

!

line con 0 transport input none

line vty 0 4 login

!

end

Customizing the Cable Access Router Interface

Different geographical regions and different cable plants use different frequency bands. The Cisco uBR900 series cable access router uses a built-in default frequency scanning feature to address this issue. After the cable access router finds a successful downstream frequency channel, it saves the channel and power setting to NVRAM. The cable access router recalls this value the next time it needs to synchronize its frequency or register with the cable service provider’s CMTS.

However, you can customize the cable access router’s interface configuration if you need to deviate from the default setting that ships with the unit. For example, you might need to specify a different compliant mode, modify the saved downstream channel setting and upstream power value, or enable a faster downstream search algorithm.

Note Most cable network scenarios will not require you to use these commands.

To customize the cable access router interface, perform the following tasks, starting in global configuration mode:

Step	Command	Purpose
1	uBR924(config)#interface cable-modem 0	Specify cable access router interface 0.
2	uBR924(config-if)#cable-modem compliant bridge	Enable DOCSIS-compliant bridging.

44Cisco IOS Release 12.0(7)T