Installation guide

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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 3 Configuring the Cisco Cable Interface
Configuring and Activating Frequency Agility
• Use the following example to add the upstream band 20,000,000 to 24,000,000 Hz to the list of valid
bands with a change in the power level of 13 dBmV for spectrum group 3:
Router(config)# cable spectrum-group 3 band 20000000 24000000 13
• Use the following example to configure a continuous band between 5,000,004 and 40,000,000 Hz
for scheduled spectrum group 4 with a default power level of 0 dBmV. The spectrum group will be
available to the spectrum group starting at 12:00 p.m. local time each Monday:
Router(config)# cable spectrum-group 4 time Monday 12:00:00 band 5000004 40000000
• Use the following example to add the upstream frequency 9,500,000 Hz to the list of valid
frequencies and change the nominal power level to 5 dBmV. The spectrum manager adjusts
frequencies and power levels on this group at 2:00 a.m. local time each day:
Router(config)# cable spectrum-group 3 time 02:00:00 frequency 9500000 5
• Use the following example to configure the minimum period before which a frequency hop can
occur in seconds:
Router(config)# cable spectrum-group 3 hop period 800
• Use the following example to configure the threshold value (expressed as a percentage) of the
number of “offline” modems identified before the Cisco uBR7100 series router initiates an
automatic frequency hop:
Router(config)# cable spectrum-group 3 hop threshold 40
• Use the following example to configure a particular spectrum group as a shared RF spectrum group.
Specifying a given spectrum group as “shared” tells the Cisco uBR7100 series router that you want
to be sure that upstream frequencies assigned to upstream interfaces are not assigned to additional
upstream interfaces:
Router(config)# cable spectrum-group 3 shared
• Use the following example to remove a specified spectrum group from your configuration:
Router(config)# no cable spectrum-group 3
Verifying Spectrum Group Characteristics
To verify spectrum group characteristics and to determine if a spectrum group is shared, use the
show cable spectrum-group command:
CMTS01# show cable spectrum-group
22:07:46: %SYS-5-CONFIG_I: Configured from console by console
Group Frequency Upstream Weekly Scheduled Power Shared
No. Band Port Availability Level Spectrum
(Mhz) From Time: To Time: (dBmV)
1 5.000-15.000 0 Yes
1 12.000 0 Yes
1 22.000 7 Yes
2 29.000 6 No
2 26.000 0 No
3 35.000-41.000 0 No
3 16.000-19.000 5 No
5* 5.000-10.000 Thu 21:50:00 Thu 21:45:00 0 Yes
Tip If you are having difficulty with verification, make sure you entered a valid spectrum group number and
type in global cable configuration mode.