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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

Verify Cable Flap List Miss Threshold

To verify the cable flap list miss threshold, 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 Size
You can specify the maximum number of cablemodems that can be listed in the cable flap list tables.
The valid range is from 1 to 8192 cablemodems. The default is 8192 cable modems.
Tospecify the maximum number of cable modems that can be recorded in the flap list, use the following
command in global configuration mode.

Verify Cable Flap List Size

To verify the cable flap list size, 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
Clear Cable Flap List
Toremove a single cable modem from the flap list or to remove all cable modems from the flaplist, use
one of the following commands in global configuration mode.
Table4-25 Instructions to Set Cable Flap List Size
Command Purpose
CMTS01(config)# cable flap-list size number Specify the maximum size of the flap list.
Table4-26 Instructions to Clear Cable Flap List
Command Purpose
CMTS01(config)# clear cable flap-list mac-addr
CMTS01(config)# clear cable flap-list all
Clear the entries in the cable flap list for the cable
modem with this MAC address.
Clear the entries for all of the cable modems in the
flap list.