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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-05
Chapter6 Troubleshooting the System
Understanding show Command Responses
Understanding show Command Responses
This section summarizes cable-related show commands. For additional command information about
these and other CMTS commands, refer to these additional resources on Cisco.com:
•CiscoBroadband Cable Command Reference Guide
•Cisco Cable Modem Termination System Feature Guide
show cable flap-list
To display the cable flap-list on a CiscouBR10012router, use the showcable flap-list command in
privileged EXEC mode.
show cable flap-list
show cable flap-list cable slot/port [upstream port] [sort-flap | sort-time]
show cable flap-list sort-interface [sort-flap | sort-time]
Syntax Description
For the CiscouBR10012router, the sort option applies to one line card at a time, then the list is merged
together. For example, the flap list is sorted for cable7/0/0, appears on the console, and then is sorted for
cable 7/0/1, which then appears on the console, and so on.
The show cable flap-list and show cable modem commands indicate when the CiscouBR10012router
has detected an unstable return path for a particular modem and has compensated with a power
adjustment. An asterisk (*) appears in the power-adjustment field for a modem when a power adjustment
has been made; an exclamation point appears when the modem has reached its maximum power transmit
level and cannot increase its power level any further.
Examples The following example shows the output of the show cable flap-list command:
Router# show cable flap-list
MAC Address Upstream Ins Hit Miss CRC P-Adj Flap Time
0010.7bb3.fd19 Cable5/0/U1 0 2792 281 0 *45 58 Jul 27 16:54:50
0010.7bb3.fcfc Cable5/0/U1 0 19 4 0 !43 43 Jul 27 16:55:01
0010.7bb3.fcdd Cable5/0/U1 0 19 4 0 *3 3 Jul 27 16:55:01
cable slot/port (Optional) Displays the flap list for a particular cable interface.
upstream port (Optional) Displays the flap list for a particular upstream on the selected
cable interface.
sort-interface (Optional) Displays the flap list for all cable interfaces, sorted by
interface.
sort-flap (Optional) Sorts the list by the number of times the CM has flapped.
sort-time (Optional) Sorts the list by the most recent time the CM is detected to
have flapped.