Cisco Broadband Cable Command Reference Guide

Chapter 2 Cisco Cable Modem Termination System Commands
Related Commands
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Table 2-18 show cable flap-list Command Field Descriptions (continued)
Field Description
Cisco Broadband Cable Command Reference Guide
show cable flap-list
Miss The number of times the CM misses the MAC layer keepalive
message. An 8 percent miss rate is normal for the Cisco cable
interface line cards. It can indicate intermittent upstream, laser
clipping, or common-path distortion.
CRC The number of cyclic redundancy check (CRC) errors from this
CM. It can indicate intermittent upstream, laser clipping, or
common-path distortion.
P-Adj The number of times the headend instructed the CM to adjust
transmit (TX) power more than 3 dB. It can indicate amplifier
degradation, poor connections, or thermal sensitivity.
Flap The sum of P-Adj and Ins values. CMs with high flap counts have
high SIDs and might not register.
Time The most recent time that the CM dropped the connection.
Tip In Cisco IOS Release 12.1(12)EC, 12.2(8)BC1, and later releases, you can add a timestamp to show
commands using the exec prompt timestamp command in line configuration mode.
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
insertion-time
cable flap-list
miss-threshold
cable flap-list
power-adjust
threshold
Sets the insertion time interval that determines whether a CM is placed in the
flap list.
Specifies the miss threshold for recording a flap-list event.
Specifies the power-adjust threshold for recording a CM flap-list event.
cable flap-list size Specifies the maximum number of CMs that can be listed in the flap-list
table.
clear cable flap-list Clears all the entries in the flap-list table.
debug cable flap Displays information about the operation of the CM flap list that is
maintained for the cable interfaces.
ping docsis Sends a DOCSIS ping to a CM and increments the flap-list counters as
appropriate.
show cable modem Displays information about all CMs on an interface or about a particular CM.
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