Cisco SR2016T-NA Reference Manual page 583

Chapter 3 Cisco CMTS Show Commands
Also see the information about this command's behavior in a Hot Standby Connection-to-Connection
Note
Protocol (HCCP) configuration, see the
Protocol (HCCP) Configuration" section on page
Examples
The following example shows sample output for the show cable modem flap command for all cable
modems on a specific cable interface:
Router# show cable modem c8/1/0 flap
MAC Address
0050.7366.1243 C8/1/0/U1 6
0002.b970.0027 C8/1/0/U4 6
0006.5314.858d C8/1/0/U4 2
Router#
The following example shows sample output for the show cable modem flap command for a particular
CM:
Router# show cable modem 0010.7bb3.fcd1 flap
MAC Address
0010.7bb3.fcd1 C5/0/U5
Router#
Table 3-22
Table 3-22 Descriptions for the show cable modem flap Fields
Field
MAC Address
I/F
Ins
Hit
Miss
CRC
P-Adj
Flap
Time
OL-1581-08
I/F Ins Hit
29770 79
29737 109
29635 41
I/F Ins Hit
0 36278 92
describes the fields shown in the show cable modem flap displays:
Description
The MAC address for the CM.
The cable interface line card, including upstream, for this CM.
The number of times the CM comes up and inserts itself into the network. It
can indicate intermittent downstream sync loss or DHCP or modem
registration problems.
The number of times the CM responds to MAC layer keepalive messages.
(The minimum hit rate is once per 30 seconds. It can indicate intermittent
upstream, laser clipping, or common-path distortion.
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.
The number of cyclic redundancy check (CRC) errors from this CM. It can
indicate intermittent upstream, laser clipping, or common-path distortion.
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.
The sum of P-Adj and Ins values. CMs with high flap counts have high SIDs
and might not register.
The most recent time that the CM dropped the connection.
"Operation with Hot Standby Connection-to-Connection
3-54.
Miss CRC P-Adj Flap
0 0 11
0 1 14
0 0 4
Miss CRC P-Adj Flap
0 369 372
Cisco Broadband Cable Command Reference Guide
show cable modem flap
Time
Apr 28 13:08:06
Apr 28 13:08:44
Apr 28 13:09:21
Time
Jun 1 13:05:23
3-87