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Chapter 2
Cisco CMTS Configuration Commands
cable upstream hop-priority
To configure the priority of the corrective actions to be taken when a frequency hop is necessary due to
ingress noise on the upstream, use the appropriate cable upstream hop-priority command in cable
interface configuration mode.
Syntax Description
n
frequency, modulation,
channel-width
Defaults
The default priority is frequency, modulation, and channel-width.
Command Modes
Interface configuration (cable interface only)
Command History
Release
12.1(7)CX1
12.2(8)BC2
12.2(11)CY, 12.2(11)BC3
12.2(15)BC2
Usage Guidelines
This command specifies the priority of the corrective actions that should be taken when a frequency hop
is necessary to correct excessive ingress noise on an upstream. For example, if the upstream on a
Cisco uBR-MC16S card is set for the default settings (frequency, modulation, and channel-width), the
following occurs when the upstream noise exceeds the CNR threshold value for the current modulation
profile:
1.
OL-1581-08
cable upstream n hop-priority frequency modulation channel-width
cable upstream n hop-priority modulation frequency channel-width
cable upstream n hop-priority frequency channel-width modulation
The Cisco uBR-MC16S changes to a new frequency, if a clean frequency is available in its spectrum
group.
Specifies the upstream port. Valid values start with 0 for the first
upstream port on the cable interface line card.
Specifies the priority of corrective actions to be taken when ingress
noise occurs on a downstream.
Note
The channel-width option must come after the frequency
option, either immediately or after the modulation option, as
shown in the above examples.
Modification
This command was introduced for Cisco uBR7200 series 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.
Support was added for the Cisco uBR10-MC5X20S cable interface
line card on the Cisco uBR10012 router.
Support was added for the Cisco uBR10-MC5X20U cable interface
line card on the Cisco uBR10012 router.
Cisco Broadband Cable Command Reference Guide
cable upstream hop-priority
2-317
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