Activating Upstream Power Adjustment - Cisco 7246VXR - uBR Router Software Configuration Manual

Configuring the Upstream Cable Modem Interface
Command
Step 1
Router(config-if)# cable upstream
usport frequency-adjust averaging
percentage
Step 2
Router(config-if)# end
Router#
To return the automatic upstream frequency adjustment percentage to the default value of 30 percent,
enter the following command in cable interface configuration mode:
Router(config-if)# no cable upstream usport frequency-adjust averaging
Verifying Upstream Frequency Adjustment
To determine if upstream frequency adjustment is configured and activated, enter the
show running-config command and look for the cable interface configuration information. If upstream
frequency adjustment is enabled, frequency adjustment entries are displayed in the
show running-config output. If frequency adjustments are disabled, no frequency adjustment entry
displays in the output.
Perform these steps if you are having difficulty with verification:
1.
2.
3.
4.

Activating Upstream Power Adjustment

To enable upstream power adjustment for a specified cable interface, use one of the following commands
in cable interface configuration mode.
Command
Router(config-if)# cable upstream
usport power-adjust continue db
Router(config-if)# cable upstream
usport power-adjust noise percentage
Router(config-if)# cable upstream 0
power-adjust threshold db
Router(config-if)# end
Router#
To return the automatic upstream power-adjustment ranging value to the default of 2 dB, enter the
following command in cable interface configuration mode:
Router(config-if)# no cable upstream usport power-adjust continue
To return the automatic upstream power-adjustment noise value to the default of 30 percent, enter the
following command in cable interface configuration mode:
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
3-16
Ensure the cable connections are not loose or disconnected
Ensure the cable interface line card is firmly seated in its chassis slot.
Ensure the captive installation screws are tight.
Verify that you have entered the correct slot and port numbers; you selected a valid frequency for
your router.
Chapter 3
Purpose
Set the minimum number of frequency adjustment packets required
to justify changing the upstream frequency adjustment method as a
percentage. Acceptable range is 10 to 100 percent.
Default = 30 percent.
Return to enable (privileged EXEC) mode.
Purpose
Sets the minimum power adjustment in dB that allows
continued ranging status. Valid values are 2 to 15 dB.
Default = 2 dB.
Sets the minimum number (percentage) of
power-adjustment packets required to justify changing the
upstream power rating. Valid values are 10 to 100 percent.
Default = 30 percent.
Sets the power-adjustment threshold in dB. Valid values are
0 to 2 dB. Default = 1 dB.
Returns to enable (privileged EXEC) mode.
Configuring Cable Modem Interface Features
OL-2239-03