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Configure and Activate Frequency Agility
VC-152
Voice, Video, and Home Applications Configuration Guide
Note The cable interface will not operate until you either create and configure a spectrum group or
set a fixed upstream frequency. From the interface configuration prompt, an interface is assigned
membership in a spectrum group. From the interface point of view, the spectrum group also
represents the set of upstreams connected to the same group of fiber nodes. This allows the spectrum
manager to know if upstream frequencies need to be managed together.
The configuration and activation of frequency agility depends on each cable operator’s physical
plant.
To configure and activate frequency agility, perform the following tasks:
• Create Spectrum Groups
• Configure and Activate Spectrum Groups
Create Spectrum Groups
To create spectrum groups, use the following commands in global configuration mode:
Validation Tips
To verify that a spectrum group has been created, enter the show cable spectrum-group command:
router# show cable spectrum-group
spectrum-group 1
spectrum-group 2
spectrum-group 3
Troubleshooting Tips
If you are having trouble, make sure you have entered a valid spectrum group number and type.
Step Command Purpose
1 cable spectrum-group group-number type blind Create a blind spectrum group.
2 cable spectrum-group group-number type scheduled
daily
Create a scheduled spectrum group that
can change its frequency and power
level at the same time every day.
3 cable spectrum-group group-number type scheduled
periodic-sec seconds
Create a scheduled spectrum group that
can change its frequency and power
level at a specified interval in seconds.