CMAC_LOG_DHCP_CONFIG_FILE_NAME

Troubleshooting Tips

Event 8Transfer Operational Parameters

After the DHCP and security operations are successful, the cable modem downloads operational parameters from a cable company’s TFTP server. These parameters are transferred via a

configuration file. The fieldshows the filename containing the transmission parameters.

508177.164

CMAC_LOG_STATE_CHANGE

configuration_file_state

508177.166

CMAC_LOG_LOADING_CONFIG_FILE

platinum.cm

508178.280

CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE

 

Event 9Perform Registration

The cable modem registers with the headend Cisco uBR7246. After the cable modem is initialized, authenticated, and configured, the cable modem is authorized to forward traffic into the cable network. A successful registration is indicated by the field CMAC_LOG_REGISTRATION_OK.

508178.300

CMAC_LOG_STATE_CHANGE

registration_state

508178.302

CMAC_LOG_REG_REQ_MSG_QUEUED

 

508178.306

CMAC_LOG_REG_REQ_TRANSMITTED

 

508178.310

CMAC_LOG_REG_RSP_MSG_RCVD

 

508178.312

CMAC_LOG_COS_ASSIGNED_SID

1/2

508178.314

CMAC_LOG_RNG_REQ_QUEUED

2

508178.316

CMAC_LOG_REGISTRATION_OK

 

Event 10Comply with Baseline Privacy

Keys for baseline privacy are exchanged between the cable modem and the CMTS (the

Cisco uBR7246 cable router). During this event, a link level encryption is performed so that a user’s data cannot be “sniffed” by anyone else who is on the cable network.

Here is a trace that shows baseline privacy enabled. The key management protocol is responsible for exchanging 2 types of keys: KEKs and TEKs. The KEK (key exchange key, also referred to as the authorization key) is used by the headend CMTS to encrypt TEKs (traffic encryption keys) it sends to the cable modem. The TEKs are used to encrypt/decrypt the data. There is a TEK for each SID configured to use privacy.

851.088

CMAC_LOG_STATE_CHANGE

establish_privacy_state

851.094

CMAC_LOG_PRIVACY_FSM_STATE_CHANGE

machine: KEK, event/state:

EVENT_1_PROVISIONED/STATE_A_START, new state: STATE_B_AUTH_WAIT

851.102

CMAC_LOG_BPKM_REQ_TRANSMITTED

 

851.116

CMAC_LOG_BPKM_RSP_MSG_RCVD

 

851.120

CMAC_LOG_PRIVACY_FSM_STATE_CHANGE

machine: KEK, event/state:

EVENT_3_AUTH_REPLY/STATE_B_AUTH_WAIT, new state: STATE_C_AUTHORIZED

856.208

CMAC_LOG_PRIVACY_FSM_STATE_CHANGE

machine: TEK, event/state:

EVENT_2_AUTHORIZED/STATE_A_START, new state: STATE_B_OP_WAIT

856.220

CMAC_LOG_BPKM_REQ_TRANSMITTED

 

856.224

CMAC_LOG_BPKM_RSP_MSG_RCVD

 

856.230

CMAC_LOG_PRIVACY_FSM_STATE_CHANGE

machine: TEK, event/state:

EVENT_8_KEY_REPLY/STATE_B_OP_WAIT, new state: STATE_D_OPERATIONAL

856.326

CMAC_LOG_PRIVACY_INSTALLED_KEY_FOR_SID

2

856.330

CMAC_LOG_PRIVACY_ESTABLISHED

 

14Release 11.3(4)NA

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Cisco Systems UBR904 manual Event 8-Transfer Operational Parameters, Event 9-Perform Registration

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.