Cisco Broadband Cable Command Reference Guide

cable flap-list insertion-time
cable flap-list insertion-time
Syntax Description
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Cisco Broadband Cable Command Reference Guide
Chapter 2 Cisco Cable Modem Termination System Commands
To set the cable flap-list insertion time interval, use the cable flap-list insertion-time command in
global configuration mode. To disable insertion time, use the no form of this command.
cable flap-list insertion-time seconds
no cable flap-list insertion-time
Defaults 180 seconds (3 minutes)
Command Modes Global configuration
Command History
Usage Guidelines This command controls the operation of a flapping modem detector. When a CM makes two or more
initial Ranging Requests (also known as insertion or reinsertion requests) within the period of time
defined by this command, the CM is placed in the flap list. A CM is not put into the flap list if the time
between its two consecutive initial Ranging Requests is greater than the insertion time interval.
For example, if the CMTS is configured for the default insertion time of three minutes, and if the CM
reinserts itself four minutes after its last insertion, the CM is not placed in the flap list. However, if the
CM reinserts itself two minutes after its last insertion, the CM is placed in the flap list.
Also, a CM is put into the flap list only once for each insertion time interval, even if the CM reinserts
itself multiple times. For example, if the CMTS is set for the default insertion time interval of 3 minutes,
and the CM reinserts itself three times within that period, the flap list will show that the CM has flapped
once. If the CM reinserts itself three times within the first 3 minute period and three more times within
the next 3 minute period, the flap list will show that the CM has flapped twice.
Examples The following example shows how to set the insertion time interval to 62 seconds:
Related Commands
seconds Insertion time interval in seconds. Valid values are from 60 to
86,400 seconds. The default value is 180 seconds (3 minutes).
Release Modification
12.1 T This command was introduced.
router(config)# cable flap-list insertion-time 62
Command Description
cable flap-list aging Specifies the number of days to keep a CM in the flap-list table before aging
it out of the table.
cable flap-list Specifies miss threshold for recording a flap-list event.
miss-threshold
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