CMAC_LOG_TOD_COMPLETE
CMAC_LOG_DHCP_COMPLETE

Interpret the MAC Log File and Take Action

Event 5—Establish IP Connectivity

After ranging is complete, the cable interface on the cable modem is up. Now the cable modem accesses a remote DHCP server to get an IP address. The DHCP request also includes the name of a file that contains additional configuration parameters, the TFTP server’s address, and the Time of Day (TOD) server’s address.

The field CMAC_LOG_DHCP_ASSIGNED_IP_ADDRESS indicates the IP address assigned from the DHCP server to the cable modem interface. The field CMAC_LOG_DHCP_TFTP_SERVER_ADDRESS marks the TFTP server’s address. The field CMAC_LOG_DHCP_TOD_SERVER_ADDRESS indicates the time of day server’s address. The field CMAC_LOG_DHCP_CONFIG_FILE_NAME shows the filename containing the

transmission parameters. The fieldshows that all the IP connectivity was a success.

508175.968

CMAC_LOG_STATE_CHANGE

dhcp_state

508176.982

CMAC_LOG_DHCP_ASSIGNED_IP_ADDRESS

188.188.1.62

508176.984

CMAC_LOG_DHCP_TFTP_SERVER_ADDRESS

4.0.0.1

508176.986

CMAC_LOG_DHCP_TOD_SERVER_ADDRESS

4.0.0.32

508176.988

CMAC_LOG_DHCP_SET_GATEWAY_ADDRESS

 

508176.988

CMAC_LOG_DHCP_TZ_OFFSET

360

508176.990

CMAC_LOG_DHCP_CONFIG_FILE_NAME

platinum.cm

508176.992

CMAC_LOG_DHCP_ERROR_ACQUIRING_SEC_SVR_ADDR

 

508176.996

CMAC_LOG_DHCP_COMPLETE

 

Event 6Establish the Time of Day

The Cisco uBR904 cable modem accesses the Time of Day server for the current date and time,

which is used to create time stamps for logged events. The fieldindicates a successful time of day sequence.

508177.120

CMAC_LOG_STATE_CHANGE

establish_tod_state

508177.126

CMAC_LOG_TOD_REQUEST_SENT

 

508177.154

CMAC_LOG_TOD_REPLY_RECEIVED

3107617539

508177.158

CMAC_LOG_TOD_COMPLETE

 

Event 7Establish Security

The cable modem establishes a security association. The security_association_state is normally bypassed since “full security” as defined by MCNS DOCSIS is not supported.

“Full security” was a request made by MSOs for a very strong authorization and authentication check by the CMTS. This request was not granted by cable modem manufacturers. Cisco fully supports baseline privacy, which protects user’s data from getting “sniffed” on the cable network.

508177.160

CMAC_LOG_STATE_CHANGE

security_association_state

508177.162

CMAC_LOG_SECURITY_BYPASSED

 

Troubleshooting Tips for the Cisco uBR904 Cable Modem 13

Page 13
Image 13
Cisco Systems UBR904 Event 5-Establish IP Connectivity, Event 6-Establish the Time of Day, Event 7-Establish Security

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.