Installation guide

5-12
Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Managing Cable Modems on the HFC Network
uBR(config)# cable spectrum-group 2 frequency 22000000 3
The order of the configuration commands defines the order which frequency or power level is changed.
There is always a single allocation set per spectrum group, listing the currently available bands. In the
case of a shared spectrum group, there is also a single free set and “in-use” set because there is a single
RF domain. Otherwise, there are free and in-use sets for each upstream port because each upstream port
has its own RF domain.
Sample output:
noisy1# show cable spec
Group Frequency Upstream Weekly Scheduled Power Shared
No. Band Port Availability Level Spectrum
(Mhz) From Time: To Time: (dBmV)
1 10.000- 0.000 1 No
1 11.000- 0.000 1 No
1 12.000- 0.000 1 No
1 13.000- 0.000 1 No
1 14.000- 0.000 1 No
2 10.000-15.000 2 No
2 10.208 [0.40] Cable1/0 U1 2
3 20.000- 0.000 3 Yes
3 21.000- 0.000 3 Yes
3 22.000- 0.000 3 Yes
3 23.000- 0.000 3 Yes
3 24.000- 0.000 3 Yes
3 0.400 [0.80] Cable1/0 U2 3
4 20.000-25.000 4 Yes
4 20.800 [1.60] Cable1/0 U3 4
5 10.000- 0.000 5 No
5 11.000- 0.000 5 No
5 12.000- 0.000 5 No
5 13.000- 0.000 Mon 17:06:00 --- --:--:-- 5 No
5 14.000- 0.000 Mon 17:08:00 --- --:--:-- 5 No
5 13.000- 0.000 Mon 17:10:00 --- --:--:-- 5 No
To display information about a specific interface or upstream port, enter the
show cable hop cable-if [upstream portnum] command. Information lines describe the frequency hop
status of an upstream port.
Table 5-1 show cable hop Command Parameters
Field Description
Upstream Port The upstream port for this information line
Port Status Show “down” if frequency is unassigned, “admindown” if the port is
shutdown, or the center frequency of the channel if the port is up
Poll Rate The rate station maintenance polls are generated (msec)
Missed Poll Count The number of missing polls
Min Poll Sample The number of polls in the sample
Missed Poll Pcnt The ratio of missing polls to the number of polls displayed as a percentage
Hop Thres Pcnt The level that the missed poll percentage must exceed to trigger a frequency
hop expressed as a percentage
Hop Period The maximum rate which frequency hopping will occur (seconds)