Chapter 4 Troubleshooting the System
Troubleshooting Using Cable Flap Lists
Set Cable Flap List Aging
You can specify the number of days to record and retain flapping activity on cable modems currently in the
To set the age of the flap list, use the following command in global configuration mode.
Table
Command | Purpose |
|
|
CMTS01(config)# cable | Specify the number of days to record and retain |
| flapping activity for the cable modems connected to |
| this Cisco uBR7200 series. |
|
|
Verify Cable Flap List Aging
To verify that cable flap list aging is set, enter the show cable flap list command:
CMTS01# show cable flap list |
|
|
|
|
|
|
| ||
Mac Addr | CableIF | Ins | Hit | Miss | CRC | Flap | Time |
| |
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 Insertion Time
You can set the cable flap list insertion time. When a cable modem makes an insertion request more frequently than the amount of insertion time defined by this command, the cable modem is placed in the flap list for activity recording. The valid range is from 60 to 86400 seconds.
To set the cable flap list insertion time, use the following command in global configuration mode.
Table
Command | Purpose |
|
|
CMTS01(config)# cable | Specify the insertion time in seconds. Any cable |
| modem that makes an insertion request more |
| frequently than this period of time is placed in the |
| flap list. |
|
|
Verify Cable Flap List Insertion Time
To verify cable flap list insertion time, enter the show cable flap list command:
| CMTS01# show cable flap list |
|
|
|
|
|
|
|
|
|
| ||
| Mac Addr | CableIF | Ins | Hit | Miss | CRC | Flap | Time |
|
|
|
| |
| 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 |
|
| |
|
| Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide |
|
|
| ||||||||
|
|
| |||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| ||
