Debug Commands

Figure 9 compares the output of the debug cable-modem mac log command with the debug cable-modem mac log verbose command. The keyword verbose displays periodic events such as ranging.

Figure 9 Sample Debug Cable-Modem Mac Log and Verbose Output

uBR904# debug cable mac log

Cable Modem mac log debugging is on uBR904#

uBR904#

uBR904# debug cable mac log verbose

Cable Modem mac log debugging is on (verbose) uBR904#

574623.810

CMAC_LOG_RNG_REQ_TRANSMITTED

574623.812

CMAC_LOG_RNG_RSP_MSG_RCVD

574627.942

CMAC_LOG_WATCHDOG_TIMER

574633.880

CMAC_LOG_RNG_REQ_TRANSMITTED

574633.884

CMAC_LOG_RNG_RSP_MSG_RCVD

574643.950

CMAC_LOG_RNG_REQ_TRANSMITTED

574643.954

CMAC_LOG_RNG_RSP_MSG_RCVD

574654.022

CMAC_LOG_RNG_REQ_TRANSMITTED

574654.024

CMAC_LOG_RNG_RSP_MSG_RCVD

574657.978

CMAC_LOG_WATCHDOG_TIMER

574664.094

CMAC_LOG_RNG_REQ_TRANSMITTED

574664.096

CMAC_LOG_RNG_RSP_MSG_RCVD

574674.164

CMAC_LOG_RNG_REQ_TRANSMITTED

574674.166

CMAC_LOG_RNG_RSP_MSG_RCVD

uBR904# no

debug cable mac log verbose

Cable Modem mac log debugging is off

uBR904#

 

574684.234

CMAC_LOG_RNG_REQ_TRANSMITTED

574684.238

CMAC_LOG_RNG_RSP_MSG_RCVD

Figure 10 shows display output for the debug cable mac messages Privileged EXEC command.

This command causes received cable MAC management messages to be displayed in a verbose format. The messages that are displayed are UCD, MAP, RNG-RSP, REG-RSP and UCC. In addition, transmitted REG-REQs are displayed in hex dump format. The output from this command is very verbose and is usually not needed for normal interface debugging. The command is most useful when attempting to attach a cable modem to an uncertified CMTS. For a description of the displayed fields of each message, refer to the MCNS DOCSIS RFI spec, v1.0.

Figure 10 Sample Debug Cable-Modem Mac Messages Output

uBR904#

debug cable mac messages

 

 

*Mar

7

01:44:06:

 

 

 

*Mar

7

01:44:06: UCD MESSAGE

 

 

*Mar

7

01:44:06: -----------

 

 

*Mar

7

01:44:06:

FRAME HEADER

 

 

*Mar

7

01:44:06:

FC

-

0xC2 == MAC Management

*Mar

7

01:44:06:

MAC_PARM

-

0x00

*Mar

7

01:44:06:

LEN

-

0xD3

*Mar

7

01:44:06:

MAC MANAGEMENT MESSAGE HEADER

 

*Mar

7

01:44:06:

DA

-

01E0.2F00.0001

*Mar

7

01:44:06:

SA

-

00E0.1EA5.BB60

*Mar

7

01:44:06:

msg LEN

-

C1

*Mar

7

01:44:06:

DSAP

-

0

*Mar

7

01:44:06:

SSAP

-

0

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Cisco Systems manual UBR904# debug cable mac log verbose, Debug cable mac messages

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.