
Chapter 4 Troubleshooting the System
Troubleshooting Using Cable Flap Lists
Set Cable Flap List Power Adjustment Threshold
You can specify the power adjustment threshold that will cause a
Note A power adjustment threshold of less than 2 dBmV might cause excessive flap list event recording. Cisco recommends setting this threshold value to 3 dBmV or higher.
To set the power adjustment threshold for
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CMTS01(config)# cable | Specify the minimum power adjustment that will |
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Verify Cable Flap List Power Adjustment Threshold
To verify the cable flap list power adjustment threshold, enter the show cable flap list command:
CMTS01# show cable flap list |
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Mac Addr | CableIF | Ins | Hit | Miss | CRC | Flap | Time |
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0010.7b6b.5d1d | C3/0 U0 | 0 | 688 | 169 | 0 | 0 | 3 | Nov 5 | 12:28:50 |
0010.7b6b.5e15 | C3/0 U0 | 1 | 707 | 185 | 0 | 0 | 5 | Nov 5 | 12:29:52 |
0010.7b6b.5e27 | C3/0 U0 | 1 | 707 | 198 | 0 | 0 | 5 | Nov 5 | 12:29:55 |
0010.7b6b.5d29 | C3/0 U0 | 1 | 709 | 205 | 0 | 0 | 5 | Nov 5 | 12:29:52 |
0010.7b6b.5e2b | C3/0 U0 | 1 | 710 | 204 | 0 | 0 | 7 | Nov 5 | 12:30:16 |
Set Cable Flap List Miss Threshold
You can specify the miss threshold for recording a
Note A high miss rate can indicate intermittent upstream problems, fiber laser clipping, or
To set the miss threshold for recording a
Table
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| CMTS01(config)# cable | Specify the number of | |||
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| that will result in the cable modems being place in | |
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| the flap list. | |
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| Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide | ||
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