Use Additional Troubleshooting Commands

Event 11Enter the Maintenance State

As soon as the cable modem is completely up and running, it enters the operational maintenance state.

508178.322 CMAC_LOG_STATE_CHANGE

maintenance_state

Use Additional Troubleshooting Commands

You can use other show controller and debug cable modem commands to troubleshoot different aspects of a cable modem. However, the most useful command is the show controller 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:

Command

Purpose

show controller cable-modem

Displays high-level controller information.

 

 

show controller cable-modem bpkm

Displays privacy state information.

 

 

show controller cable-modem des

Displays information about the Data Encryption

 

Standard (DES) engine registers.

 

 

show controller cable-modem filters

Displays information about the MAC and SID cable

 

modem filters.

 

 

show controller cable-modemlookup-table

Displays the mini-slot lookup table inside a cable

 

modem.

 

 

show controller cable-modem mac [errors hardware

Displays detailed MAC layer information.

log resets state]

 

 

 

show controller cable-modem phy

Displays physical layer information, such as receive

 

and transmit physical registers.

 

 

show controller cable-modem tuner

Displays tuning information.

 

 

To debug different components of a cable modem, enter one or more of the following commands in Privileged EXEC mode:

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.

 

 

Troubleshooting Tips for the Cisco uBR904 Cable Modem 15

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Cisco Systems UBR904 manual Use Additional Troubleshooting Commands, Event 11-Enter the Maintenance State, Command Purpose

UBR904 specifications

The Cisco UBR904 is a versatile broadband access device designed to deliver high-speed internet and data services in various deployment scenarios, particularly suitable for cable operators and service providers. This device allows operators to provide broadband services over a wide area, utilizing advanced technologies to ensure reliability and performance.

One of the key features of the UBR904 is its capability to support multiple channels for upstream and downstream communication, allowing for greater bandwidth and improved network performance. With its integrated DOCSIS (Data Over Cable Service Interface Specification) compliance, the UBR904 enables operators to leverage existing coaxial cable infrastructures to deliver data services efficiently. This makes it an ideal choice for operators looking to expand their service offerings without the need for extensive infrastructure changes.

Equipped with a powerful processor and ample memory, the UBR904 is designed for high throughput and low latency, supporting IP data services, voice services, and video on demand. It utilizes advanced modulation techniques and error correction algorithms that enhance data transmission efficiency and reliability. This results in a robust platform capable of meeting the demands of high-density areas while accommodating future growth.

The UBR904 also features flexible management capabilities. It includes support for SNMP (Simple Network Management Protocol), enabling operators to monitor and manage network performance effectively. The device can be easily configured through a graphical user interface or command-line interface, providing system administrators with the tools needed for straightforward deployment and maintenance.

In addition to its core functionalities, the UBR904 integrates security features to protect network traffic and ensure user data integrity. This includes capabilities for secure tunneling and access control lists, which enhance the security of the broadband connection.

Furthermore, the Cisco UBR904 is designed with scalability in mind. Operators can easily scale their networks by adding additional modules or interfaces as demand grows. This ensures that the UBR904 can meet the evolving needs of service providers without necessitating a complete hardware overhaul.

In summary, the Cisco UBR904 is a robust, feature-rich broadband access device that combines high performance, advanced technologies, and scalability, making it an excellent choice for operators looking to deliver high-speed internet and data services across diverse environments. Its ease of use and extensive management features further enhance its appeal, positioning it as a key player in the broadband access market.