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Command Reference

12.0(7)XR2

Default

None.

Command Mode

Global conﬁguration

Command History

parameter The spectrum group values that can be changed or added are:

• Frequency—Speciﬁes the center frequency for the given spectrum group. Entering

additional cable spectrum-group group number frequency commands for the same

spectrum group will create a collection of allowable center frequencies for spectrum

group hopping.

• Band—Speciﬁes a range of center frequencies the Cisco uBR7200 series can scan in

order to ﬁnd an acceptable channel to which the spectrum group may hop.

Note The spectrum management daughter card on the MC16S can use the frequency

range you specify in this command line to scan a range of frequencies for possible

automatic hop, instead of having to specify a number of individual frequencies using the

cable spectrum-group group number frequency command.

• Time—Speciﬁes a time of day that the Cisco uBR7200 series should automatically

perform a frequency hop for the given upstream spectrum group.

Note The time command can be combined with the frequency and band commands, as

shown in the “Example” section on page 20.

• Hop period—Specify the minimum period (in seconds) before which a frequency hop

can occur.

• Hop threshold—The threshold value (expressed as a percentage) of the number of

“ofﬂine” modems identiﬁed before the Cisco uBR7200 series initiates an automatic

frequency hop.

• Shared—Specify that a particular spectrum group is a shared RF spectrum group.

Specifying a given spectrum group as “shared” tells the Cisco uBR7200 series that

you want to be sure that upstream frequencies assigned to upstream interfaces are not

assigned to additional upstream interfaces.

value The corresponding parameter value for the parameter you are deﬁning for a given

spectrum group.

Release Modiﬁcation

12.0(5)T1 This command was introduced.

12.0(7)XR2 The band parameter for this command was added to enable frequency

range scanning capabilities in the MC16S cable modem card.

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Cisco MC16S Manual de usuario Pagina 20