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cable upstream frequency
cable upstream frequency
To enter a fixed frequency of the upstream radio frequency (RF) carrier for an upstream port, use the
cable upstream frequency command in cable interface configuration mode. To restore the default value
for this command, use the no form of this command.
Syntax Description
n
up-freq-hz
Defaults
Dynamic (not fixed frequency)
Command Modes
Interface configuration (cable interface only)
Command History
Release
11.3 XA
12.0(13)SC
12.1(4)EC, 12.2(4)BC1 Support for the higher EuroDOCSIS upstream range (5 to 65 MHz) was
12.2(15)BC2
Usage Guidelines
The upstream channel frequency of your RF output must be set to comply with the expected input
frequency of your cable interface line card. To configure an upstream channel frequency, you may:
•
•
The allowable range for the upstream channel frequency depends on the cable interface line card and
Cisco IOS software release being used. See
Cisco Broadband Cable Command Reference Guide
2-314
cable upstream n frequency up-freq-hz
no cable upstream n frequency up-freq-hz
Specifies the upstream port number on the cable interface line card for
which you want to assign an upstream frequency. Valid values start with
0 for the first upstream port on the cable interface line card.
The upstream center frequency is configured to a fixed Hertz (Hz) value.
The valid upstream frequency range is 5 MHz (5000000 Hz) to 42 MHz
(42000000 Hz), 55 MHz (55000000 Hz), or 65 MHz (65000000 Hz),
depending on the cable interface line card being used. If you wish to have
the Cisco CMTS dynamically specify a center frequency for the given
upstream interface, do not enter any frequency value.
Modification
This command was introduced.
Support for the higher EuroDOCSIS upstream range (5 to 65 MHz) was
introduced for the Cisco uBR-MC16E cable interface line card.
introduced for the Cisco uBR7111E and Cisco uBR7114E routers.
The allowable range of frequencies that you can select with this command is
determined by the configuration of the
Configure a fixed frequency between the allowable ranges and enable the upstream port,
or
Create a global spectrum group, assign the interface to it, and enable the upstream port.
Chapter 2
upstream freq-range
Table 2-11
for the currently supported values.
Cisco CMTS Configuration Commands
command.
OL-1581-08
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