Cisco 7246VXR - uBR Router Software Configuration Manual page 245

Chapter 6 Configuring Basic Broadband Internet Access
description Cable Downstream Interface
ip address 10.254.1.1 255.255.255.0 secondary
ip address 10.128.1.1 255.255.255.0
no keepalive
cable downstream annex B
cable downstream modulation 64qam
cable downstream interleave-depth 32
cable downstream frequency 851000000
cable down rf-power 55
cable upstream 0 description Cable upstream interface, North
cable upstream 0 frequency 37008000
cable upstream 0 power-level 0
cable upstream 0 admission-control 150
no cable upstream 0 shutdown
cable upstream 1 description Cable upstream interface, South
cable upstream 1 frequency 37008000
cable upstream 1 power-level 0
cable upstream 1 admission-control 150
no cable upstream 1 shutdown
cable upstream 2 description Cable upstream interface, East
cable upstream 2 frequency 37008000
cable upstream 2 power-level 0
cable upstream 2 admission-control 150
no cable upstream 2 shutdown
cable upstream 3 description Cable upstream interface, West
cable upstream 3 frequency 37008000
cable upstream 3 power-level 0
cable upstream 3 admission-control 150
no cable upstream 3 shutdown
no cable arp
cable source-verify dhcp
cable dhcp-giaddr policy
!
ip classless
no ip forward-protocol udp netbios-ns
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
ip http server
!
!
alias exec scm show cable modem
alias exec scf show cable flap
alias exec scp show cable qos profile
!
line con 0
transport input none
line aux 0
line vty 0 4
login
!
end
To set up spectrum management in your configuration, use the following commands to set up the critical
elements:
cable spectrum-group 1 frequency 40000000
cable spectrum-group 1 frequency 20000000 2
In this illustration, the user has configured spectrum management group number "1" to be available to
upstream channels. As defined by the two previous command lines, the "preferred" choice is for the
upstream to operate on a 40-MHz channel. If that channel is not suitable for the transmission scheme
available, the upstream automatically moves over to transmitting at 20 MHz and increases the receive
power rating by 2 dB.
OL-2239-03
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
Basic Internet Access Sample Configuration File
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