Step 5—Use Additional Troubleshooting Commands
18 Cisco IOS Release 12.0(5)T

Event 11—Enter the Maintenance State

As soon as the Cisco uBR924 has successfully completed the above events, it enters the operational
maintenance state and is authorized to forward traffic into the cable network.
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 Cisco uBR924 cable access router. However, the most useful command is the show
controllers cable-modem0 mac command.
To display additional controller information inside a Cisco uBR924, enter one or more of the
following commands in privileged EXEC mode:
To debug different components of a Cisco uBR924, 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 filters.
show controllers cable-modem lookup-table Displays the Cisco uBR924’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 rece ive and
transmit physical registers.
show controllers cable-modem tuner Displays tuning information.
show interface cable-modem Displays information about the Cisco uBR924
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 Cisco uBR924 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.