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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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Chapter4 Troubleshooting the System Troubleshooting Using Cable Flap Lists
Set Cable Flap List Aging
Youcan specify the number of days to record and retain flapping activity on cable modems currently in
the flap-list table. This value is known as the age of the flap list. The valid range is from 1to 60 days.
To set the age of the flap list, use the following command in global configuration mode.

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 P-Adj 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 cablemodem makes an insertion request more
frequently than the amount of insertion time defined by this command, the cablemodem 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.

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 P-Adj 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
Table4-21 Instructions to Set Cable Flap List Aging
Command Purpose
CMTS01(config)# cable flap-list aging days Specify the number of days to record and retain
flappingactivity for the cable modems connected to
this Cisco uBR7200 series.
Table4-22 Instructions to Set Cable Flap List Insertion Time
Command Purpose
CMTS01(config)# cable flap-list insertion-time seconds 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.