Specifications

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Cisco Cable Modem Termination System Feature Guide
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Chapter 3 Spectrum Management for the Cisco Cable Modem Termination System
Configuration Tasks
Assigning the Spectrum Group and the Upstream Ports
After you have added upstream frequencies (hop tables) and you have determined which upstream ports
you want assigned to a combiner group, you want to assign the upstream ports to the frequency hop
tables for an interface.
To configure a frequency hop table, use the following commands:
Note For help in determining which upstream ports to assign in a combiner group, refer to the example,
Determining the Upstream Ports Assigned to a Combiner Group Example, page 3-61.
Tip To display the current allocation table and frequency assignments, use the show cable spectrum-group
command in privileged EXEC mode.
Configuring Dynamic Upstream Modulation
To create a modulation profile, set modulation profile parameters, select an interface, and add the
modulation profile to the interface, use the following commands:
Command Purpose
Step 1
CMTS01(config)# interface cable slot/port
Enters cable interface configuration mode for the
interface to which you want to assign a spectrum
group.
Step 2
CMTS01(config-if)# cable spectrum-group group-number
Assigns the spectrum group to the interface.
Step 3
CMTS01(config-if)# cable upstream usport
spectrum-group group-number
Assigns the upstream ports to the spectrum group for
the interface.
Step 4
CMTS01(config-if)# no cable upstream port shutdown
Enables the upstream port.
Step 5
CMTS01(config-if)# exit
Exits configuration mode.
Command Purpose
Step 1
Router(config)# configure terminal
Enters configuration mode.