Chapter 4 Troubleshooting the System
Managing Cable Modems on the HFC Network
Sample output:
noisy1#show cable spec |
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Group | Frequency | Upstream | Weekly Scheduled | Power | Shared | |
No. | Band | Port | Availability |
| Level | Spectrum |
| (Mhz) |
| From Time: | To Time: | (dBmV) |
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1 | 10.000- 0.000 |
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| 1 | No |
1 | 11.000- 0.000 |
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| 1 | No |
1 | 12.000- 0.000 |
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| 1 | No |
1 | 13.000- 0.000 |
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| 1 | No |
1 | 14.000- 0.000 |
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| 1 | No |
2 |
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| 2 | No | |
2 | 10.208 [0.40] | Cable3/0 U1 |
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| 2 |
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3 | 20.000- 0.000 |
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| 3 | Yes |
3 | 21.000- 0.000 |
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| 3 | Yes |
3 | 22.000- 0.000 |
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| 3 | Yes |
3 | 23.000- 0.000 |
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| 3 | Yes |
3 | 24.000- 0.000 |
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| 3 | Yes |
3 | 0.400 [0.80] | Cable3/0 U2 |
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| 3 |
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4 |
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| 4 | Yes | |
4 | 20.800 [1.60] | Cable3/0 U3 |
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| 4 |
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5 | 10.000- 0.000 |
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| 5 | No |
5 | 11.000- 0.000 |
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| 5 | No |
5 | 12.000- 0.000 |
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| 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 | |
5 | 1.600 [3.20] | Cable3/0 U4 |
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| 5 |
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6 |
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| 6 | No | |
6 |
| Mon 17:11:00 | Mon 17:12:00 | 6 | No | |
6 | 10.800 [1.60] | Cable3/0 U5 |
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| 0 |
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To display information about a specific interface or upstream port, enter the following command:show cable hop
Table
Field | Description |
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Upstream Port | The upstream port for this information line |
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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 |
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Poll Rate | The rate station maintenance polls are generated (msec) |
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Missed Poll Count | The number of missing polls |
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Min Poll Sample | The number of polls in the sample |
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Missed Poll Pcnt | The ratio of missing polls to the number of polls displayed as a percentage |
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Hop Thres Pcnt | The level that the missed poll percentage must exceed to trigger a frequency |
| hop expressed as a percentage |
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Hop Period | The maximum rate which frequency hopping will occur (seconds) |
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Corr FEC Errors | The number of correctable FEC errors on this upstream port |
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Uncorr FEC Errors | The number of uncorrectable FEC errors on this upstream port |
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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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