Step 5—Use Additional Troubleshooting Commands
Troubleshooting Tips for the Cisco uBR904 Cable Modem 15
Event 11
—
Enter the Maintenance State
As soon as the cable modem has successfully completed the above events, it enters the operational
maintenance state.
508178.322 CMAC_LOG_STATE_CHANGE maintenance_state
Step 5—Use Additional Troubleshooting Commands
You can use other show controllers and debug cable modem commands to troubleshoot different
aspects of a cable modem. However, the most useful command is the show controllers
cable-modem 0 mac command.
To display additional controller information inside a cable modem, enter one or more of the
following commands in privileged EXEC mode:
To debug different components of a cable modem, enter one or more of the following commands in
privileged EXEC mode:
Command
Purpose
show controllers cable-modem
Displays high-level controller information.
show controllers cable-modem bpkm
Displays privacy state information.
show controllers cable-modem des
Displays information about the Data Encryption
Standard (DES) engine registers.
show controllers cable-modem filters
Displays information about the MAC and SID cable
modem filters.
show controllers cable-modem lookup-table
Displays the cable modem’s internal mini-slot lookup
table.
show controllers cable-modem mac
[
errors
|
hardware
|
log
|
resets
|
state
]
Displays detailed MAC-layer information.
show controllers cable-modem phy
Displays physical-layer information such as receive and
transmit physical registers.
show controllers cable-modem tuner
Displays tuning information.
show interface cable-modem
Displays information about the cable modem interface.
Command
Purpose
debug cable-modem bpkm
{
errors
|
events
|
packets
}
Debugs baseline privacy information.
debug cable-modem bridge
Debugs the bridge filter.
debug cable-modem error
Debugs cable interface errors.
debug cable-modem interrupts
Debugs cable modem interface interrupts.
debug cable-modem mac
{
log
[
verbose
] |
messages
}
Displays and debugs the MAC-layer log entries in
real time.
debug cable-modem map
Debugs map message processing information.
