Technical information

ADC Telecommunications, Inc.
172 CHAPTER 2: CUDA 12000 BASE SYSTEM COMMANDS
flap-list insertion-time
This command sets the flap-list insertion time, in seconds, for the current CMTS.
The system maintains a cable modem flap table for every cable modem (whether active or not)
that has difficulty communicating with the CMTS. Flapping refers to the rapid disconnecting and
reconnecting of cable modems. The flap list maintains a flap count and logs the most recent
flapping activity for each cable modem attached to the CMTS.
The insertion time is the primary criteria used in determining which cable modems the system
adds to the flap list. The system adds a modem to the flap list if the modem comes online, and
then goes offline within the amount of time specified by this command.
For example, if the flap list insertion time is set to 60 seconds, and a modem goes offline within
45 seconds of coming online, the system records the flap event in the flap list. If instead the
modem goes offline 65 seconds after coming online, the flap event is not recorded.
Note that a higher flap list insertion time results in the system recording a greater number of flap
events; a lower number results in the system recording fewer flap events.
Mode
interface:cable:csi(<c/s/i>)
Syntax
flap-list insertion-time <value>
Arguments
Example
cli:172.16.19.10:root# interface 1/1/1
mode: interface:cable:csi(1/1/1)
cli:172.16.19.10:interface:cable:csi(1/1/1)# flap-list insertion-time 604800
cli:172.16.19.10:interface:cable:csi(1/1/1)#
<value> Flap insertion time, in seconds, that you want to specify for this CMTS
interface. Default: 604800 seconds. Acceptable values: 0 – 604800.