Cisco Broadband Cable Command Reference Guide

Chapter 2 Cisco Cable Modem Termination System Commands
cable downstream rf-shutdown
OL-1581-05
cable downstream rf-shutdown
To disable the RF output from an integrated upconverter on the Cisco uBR7100 series router or the
Cisco uBR10-MC5X20S 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
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 Support was added for the Cisco uBR10-MC5X20S cable interface line card
on the Cisco uBR10012 router.
Usage Guidelines By default, the integrated upconverter on the Cisco uBR7100 series router and the
Cisco uBR10-MC5X20S cable interface line card 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 cable interface line card does not provide IF output for its
downstream ports.
Examples The following example enables the integrated upconverter on the Cisco uBR7100 series router:
router(config)# cable interface 1/0
router(config-if)# no cable downstream rf-shutdown
Cisco Broadband Cable Command Reference Guide
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