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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-05
Chapter6 Troubleshooting the System
show cable modem
show cable modem To display information for the registered and unregistered CMs, use the show cable modem command
in privileged EXEC mode.
show cable modem [ip-address | interface | mac-address] [options]
Some command options differ between the CiscouBR10012router (Cisco IOS Release 12.2 XF) and the
Cisco uBR7200 series routers (Cisco IOS 12.1 EC).
Note Commencing with Cisco IOS Release 12.0(7)XR and 12.1(1a)T1, the output of this command was
enhanced to show that the Cisco CMTS has detected an unstable return path for a particular CM and
has compensated with a power adjustment.
•An asterisk (*) appears in the p-adj (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.
Syntax Description ip-address Identifies the IP address of a specific modem to be displayed.
interface Displays all CMs on a specific CMTS cable interface.
mac-address Identifies the MAC address of a specific CM to be displayed.
Available options when displaying information for a cable interface or for a single CM
access-group Displays access group.
connectivity Displays connectivity content.
counters Displays cable counters.
errors Displays error details for one or all CMs.
flap Displays flap content.
mac Displays the DOCSIS MAC version and capabilities.
maintenance Displays station maintenance error statistics.
offline Displays CMs that are offline.
phy Displays the phy layer content.
registered Displays information for CMs that have registered with the CMTS.
remote-query Displays the signal-noise ratio (SNR) and power statistics that the CMTS has
acquired from polling the CMs. NOTE - In Cisco 12.1 CX and above, the phy
option should be used instead of the remote-query option.
summary Displays the total number, number of active, and number of registered modems
per interface. This option can be used with total and upstream options to
display details for specific line cards and ports.
unregistered Displays information for CMs that have not registered with the CMTS.
verbose Displays detailed information, replacing the former detail option, and
providing information such as:
•Signal-to-noise ratio (SNR) information for each CM on each interface
•Summary display of the total number of modems connected for each
upstream channel
•Total number of registered and unregistered modems for the specified
interface or upstream
Total number of offline modems for the specified interface or upstream and
status for each offline modem before it went offline