Cisco SR2016T-NA Reference Manual page 363

Chapter 2 Cisco CMTS Configuration Commands
cable upstream snr-polling
To configure how often cable interface cards with hardware spectrum management should poll an
upstream to determine its Carrier-to-Noise Ration (CNR), use the cable upstream snr-polling command
in cable interface configuration mode.
This command can be used only on upstreams on the Cisco uBR-MC16S cable interface line cards.
Note
Syntax Description n
interval-in-ms
Defaults 5000 milliseconds
Command Modes
Interface configuration (cable interface only)
Command History Release
12.1(7)CX1
12.2(8)BC2
Usage Guidelines
The Cisco uBR-MC16S cable interface line cards contain digital signal processors (DSPs) that perform
hardware spectrum management. Use the cable upstream snr-polling command to determine how often
that hardware should examine an upstream's signal to determine the current CNR value.
Examples
The following example shows how to configure the sixth upstream on a Cisco uBR-MC16S cable
interface card so that the DSP samples the upstream signal every 10 seconds (10,000 milliseconds):
Router(config)# interface cable 3/0
Router(config-if)# cable upstream 5 snr-polling 10000
Router(config-if)#
Related Commands Command
cable modulation-profile
cable upstream
modulation-profile
OL-1581-08
cable upstream n snr-polling interval-in-ms
Description
Creates a cable modulation profile.
Configures an upstream for one modulation profile (static profile) or two
modulation profiles (Dynamic Upstream Modulation).
Specifies the upstream port number. Valid values start with 0 for the
first upstream port on the cable interface line card.
The valid range is 1000 to 25000 milliseconds, with a default of 15000
milliseconds.
Modification
This command was introduced for Cisco CMTS routers using the
Cisco uBR-MC16S cable interface line card.
Support was added for the Cisco uBR10012 router and the
Cisco uBR-LCP2-MC16S cable interface line card.
Cisco Broadband Cable Command Reference Guide
cable upstream snr-polling
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