Cisco Systems UBR904 manual Event 3-Obtain Upstream Parameters

Page 12
CMAC_LOG_RANGING_SUCCESS
CMAC_LOG_POWER_LEVEL_IS

Troubleshooting Tips

Event 3—Obtain Upstream Parameters

The cable modem waits for an upstream channel descriptor messages (UCD) from the headend Cisco uBR7246. This is done to retrieve transmission parameters for the upstream channel.

508146.124

CMAC_LOG_STATE_CHANGE

wait_ucd_state

508147.554

CMAC_LOG_UCD_MSG_RCVD

3

508147.558

CMAC_LOG_UCD_NEW_US_FREQUENCY

20000000

508147.558

CMAC_LOG_SLOT_SIZE_CHANGED

8

508147.622

CMAC_LOG_FOUND_US_CHANNEL

1

508147.624

CMAC_LOG_STATE_CHANGE

wait_map_state

508148.058

CMAC_LOG_MAP_MSG_RCVD

 

508148.060

CMAC_LOG_INITIAL_RANGING_MINISLOTS

40

Event 4—Start Ranging for Power Adjustments

The ranging process adjusts cable modem’s transmit power. The cable modem performs ranging in two stages, ranging state 1 and ranging state 2.

The field

modem to adjust to. The field successful.

is the power level that the Cisco uBR7246 told the cable indicates that the ranging adjustment was

508148.062

CMAC_LOG_STATE_CHANGE

ranging_1_state

508148.064

CMAC_LOG_RANGING_OFFSET_SET_TO

9610

 

508148.066

CMAC_LOG_POWER_LEVEL_IS

28.0

dBmV (commanded)

508148.068

CMAC_LOG_STARTING_RANGING

 

 

508148.070

CMAC_LOG_RANGING_BACKOFF_SET

0

 

508148.072

CMAC_LOG_RNG_REQ_QUEUED

0

 

508148.562

CMAC_LOG_RNG_REQ_TRANSMITTED

 

 

508148.566

CMAC_LOG_RNG_RSP_MSG_RCVD

 

 

508148.568

CMAC_LOG_RNG_RSP_SID_ASSIGNED

2

 

508148.570

CMAC_LOG_ADJUST_RANGING_OFFSET

2408

 

508148.572

CMAC_LOG_RANGING_OFFSET_SET_TO

12018

 

508148.574

CMAC_LOG_ADJUST_TX_POWER

20

 

508148.576

CMAC_LOG_POWER_LEVEL_IS

33.0

dBmV (commanded)

508148.578

CMAC_LOG_STATE_CHANGE

ranging_2_state

508148.580

CMAC_LOG_RNG_REQ_QUEUED

2

 

508155.820

CMAC_LOG_RNG_REQ_TRANSMITTED

 

 

508155.824

CMAC_LOG_RNG_RSP_MSG_RCVD

 

 

508155.826

CMAC_LOG_ADJUST_RANGING_OFFSET

-64

 

508155.826

CMAC_LOG_RANGING_OFFSET_SET_TO

11954

 

508155.828

CMAC_LOG_RANGING_CONTINUE

 

 

508165.892

CMAC_LOG_RNG_REQ_TRANSMITTED

 

 

508165.894

CMAC_LOG_RNG_RSP_MSG_RCVD

 

 

508165.896

CMAC_LOG_ADJUST_TX_POWER

-9

 

508165.898

CMAC_LOG_POWER_LEVEL_IS

31.0

dBmV (commanded)

508165.900

CMAC_LOG_RANGING_CONTINUE

 

 

508175.962

CMAC_LOG_RNG_REQ_TRANSMITTED

 

 

508175.964

CMAC_LOG_RNG_RSP_MSG_RCVD

 

 

508175.966

CMAC_LOG_RANGING_SUCCESS

 

 

12Release 11.3(4)NA

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Contents Feature Summary BenefitsFeature Summary List of TermsPrerequisites Supported MIBs and RFCsList of Terms Cmts to Cable Modem Network Topology Cmts to Cable Modem Network TopologyTroubleshooting Tips Understand How Basic Initialization WorksUnderstand How Basic Initialization Works Troubleshooting Tips Cable Modem Initialization FlowchartConnect to the Cable Modem Display the Cable Modem’s MAC Log File UBR904# show controller cable-modem 0 mac logDisplay the Cable Modem’s MAC Log File Cmaclogresetfromdriver Interpret the MAC Log File and Take ActionEvent 1-Wait for the Link to Come Up UBR904# show controller cable-modem 0 mac ?Interpret the MAC Log File and Take Action Event 4-Start Ranging for Power Adjustments Event 3-Obtain Upstream ParametersEvent 5-Establish IP Connectivity Event 6-Establish the Time of DayEvent 7-Establish Security Event 8-Transfer Operational Parameters Event 9-Perform RegistrationEvent 10-Comply with Baseline Privacy Use Additional Troubleshooting Commands Event 11-Enter the Maintenance StateUse Additional Troubleshooting Commands Command PurposeCommand Reference Command ReferenceCommand Mode Show controller cable-modemSyntax Description Usage GuidelinesRelated Commands Show controller cable-modem bpkm Show controller cable-modem bpkmUBR904# show controller cable-modem 0 bpkm Show controller cable-modem des UBR904# show controller cable-modem 0 des downstream desShow controller cable-modem des Show controller cable-modem filters DsmacdafiltersShow controller cable-modem filters Show controller cable-modem lookup-table Lookup table is displayed in the following exampleShow controller cable-modem lookup-table Errors Show controller cable-modem mac014308 528311.396 Cmacloginitialrangingminislots 014313 528315.936 CmaclogadjustrangingoffsetShow controller cable-modem mac 014259 528302.046 CmaclogdriverinitidbshutdownCmaclogwatchdogtimer CmaclogresetdhcpwatchdogexpiredUBR904# show controller cable-modem 0 mac errors CmaclogdhcpprocesskilledPossible but Uncommon Cable Interface Reset Causes UBR904# show controller cable-modem 0 mac resetsSample Displays Message DescriptionCmaclogresetprivacywatchdogexpired CmaclogresetchangeuswatchdogexpiredCmaclogresetsecuritywatchdogexpired CmaclogresetallfrequenciessearchedCmaclogresetdstunerwatchdog CmaclogresetunabletosetmibobjectInterrupts Irqpend=0x0018, irqmask=0x00E7 UBR904# show controller cable-modem 0 mac state TrueDS ID 64QAMUS ID Burst Descriptor Interval Usage CodeRanging Backoff Start Show controller cable-modem phy D11=FFD3FFADD12=FFD3FFE0 Show controller cable-modem phy CC CC CC CC CC 0D 0D CC CC CC CC CC CC CC CC 0DShow controller cable-modem tuner Show controller cable-modem tuner Show interface cable-modem AccountingShow interface cable-modem UBR904# show int cable-modem 0 accountingARP UBR904# show int cable-modem 0 countersDebug Commands Debug CommandsDebug cable-modem bpkm Debug cable-modem bpkmBpkm UBR904# debug cable bpkmRelated Commands Debug cable-modem bridge Debug cable-modem bridgeUBR904# debug cable-modem bridge Debug cable-modem error Sample Debug Cable-Modem Error OutputDebug cable-modem error Debug cable-modem interrupts Debug cable-modem interruptsUBR904# debug cable-modem interrupts Debug cable-modem mac Debug cable-modem mac Sample Debug Cable-Modem Mac Log OutputUBR904# debug cable-modem mac log UBR904# debug cable mac log UBR904# debug cable mac log verboseDebug cable mac messages Rsvd CC 0DEhdr MAC Management Message HeaderDebug cable-modem map Debug cable-modem mapDebug cable-modem map What to do Next What to do Next
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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.