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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
cable downstream rf-shutdown
cable downstream rf-shutdown
To disable the RF output from an integrated upconverter on the Cisco uBR7100 series router,
Cisco uBR-MC16U, Cisco uBR-MC28U or the Cisco uBR10-MC5X20S/U cable interface line card, use
the
cable downstream rf-shutdown
command in cable interface configuration mode. To enable the RF
output on the integrated upconverter, use the
no
form of this command.
cable downstream rf-shutdown
no cable downstream rf-shutdown
Syntax Description
This command has no arguments or keywords.
Defaults
RF output is disabled.
Command Modes
Interface configuration (cable interface only)
Command History
Usage Guidelines
By default, the integrated upconverter on the Cisco uBR7100 series router, Cisco uBR-MC16U,
Cisco uBR-MC28U, and the Cisco uBR10-MC5X20S/U cable interface line cards is disabled, and the
downstream port does not output any signal. The
no
form of this command enables the integrated
upconverter, allowing it to output an RF signal through the downstream port.
However, before a valid DOCSIS downstream signal can be output, the following must also be done:
•
A valid downstream RF frequency must be configured using the
cable downstream frequency
cable interface command.
•
The cable interface must be enabled using the
no shutdown
command on the cable interface.
Note
This command does not affect the IF output from the DS0 downstream port on the Cisco uBR7100 series
router. The Cisco uBR10-MC5X20S/U, Cisco uBR-MC16U, and Cisco uBR-MC28U cable interface
line cards do not provide IF output for their downstream ports.
Release
Modification
12.1(5)EC1
This command was introduced to provide support on the integrated
upconverter on the Cisco uBR7100 series router.
12.2(11)CY,
12.2(11)BC3
Support was added for the Cisco uBR10-MC5X20S cable interface line card
on the Cisco uBR10012 router.
12.2(15)CX
Support was added for the Cisco uBR-MC16U and Cisco uBR-MC28U
cable interface line card.
12.2(15)BC2
Support was added for the Cisco uBR-MC5X20U cable interface line cards.