Cisco Systems UBR900 specifications Cable-modem downstream saved channel

cable-modem downstream saved channel

cable-modem downstream saved channel

To modify the saved downstream channel setting and upstream power value on a cable access router interface, enter the cable-modem downstream saved channel command from interface configuration mode. Use the no form of this command to remove the saved settings, which will be resaved at the next initialization cycle.

cable-modem downstream saved channel ds-frequencyus-power

no cable-modem downstream saved channel ds-frequencyus-power

Syntax Description

ds-frequency	Downstream channel frequency in Hz, which can be from 91000000 to 860000000.
us-power	Upstream power level in decibels per millivolt (dBmV), which can be from 8 to 61.

Defaults

Enabled

Command Modes

Interface configuration

Command History

ReleaseModification

11.3 NA This command was introduced.

Usage Guidelines

This command is auto-generated by the operation of the cable MAC layer process. The DOCSIS RFI specification requires that cable modems remember the downstream frequency and upstream power of the last successfully ranged session. These parameters are called up as the first downstream frequency and upstream power to use the next time the cable modem is booted. This operation dramatically speeds up the channel search.

Use the no cable-modem downstream saved channel ds-frequencyus-powercommand to remove the saved frequency and power setting from the running configuration, which will be resaved at the next initialization cycle.

Cisco recommends that this command NOT be used by end users of the Cisco uBR900 series cable access router.

Examples

The following example shows how to remove the downstream frequency of 91000000 Hz and the upstream power level of 33 dBmV from the running configuration of a cable-modem interface, starting from global configuration mode.

uBR924(config)# interface cable-modem 0

uBR924(config-if)#no cable-modem downstream saved channel 91000000 33

uBR924(config-if)#

Configuring the Cisco uBR900 Series Cable Access Routers 59