Cisco Systems UBR904 manual Show controller cable-modem tuner

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Command Reference

show controller cable-modem tuner

To display the settings for the upstream and downstream tuners used by a cable modem, use the show controller cable-modem tuner Privileged EXEC command.

show controller cable-modem tuner

Syntax Description

There are no key words or arguments for this command.

Command Mode

Privileged EXEC

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 NA.

Sample Display

The cable modem’s tuner settings are displayed in the following example. See Table 3 for output field possibilities and descriptions.

uBR904# show controller cable-modem 0 tuner Tuner: status=0x00

Rx: tuner_freq 507000000, symbol_rate 5360736, local_freq 11520000 snr_estimate 17488, ber_estimate 0, lock_threshold 26000

QAM not in lock, FEC not in lock, qam_mode QAM_64

Tx: tx_freq 20000000, power_level 0x3E, symbol_rate 1280000

Table 3 Show Controller Cable-Modem Tuner Field Descriptions

FieldDescription

tuner_freq Indicates the current downstream frequency.

symbol_rate Indicates the downstream or upstream symbol rate in use.

snr_estimate Signal to noise estimate in dB X 1000.

ber_estimate Bit error rate estimate (always 0).

QAM status Indicates if QAM/FEC loc has been acquired and the modulation mode in use.

tx_freq

Current upstream frequency.

power_level Transmit power level as set in the hardware. The units are unique to the hardware used. Use the show controller cable-modem 0 mac state EXEC command to see the power level in dBmV.

Related Commands

show controller cable-modem

show controller cable-modem bpkm show controller cable-modem des show controller cable-modem filters show controller cable-modemlookup-table

38Release 11.3(4)NA

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Contents Feature Summary BenefitsFeature Summary List of TermsList of Terms PrerequisitesSupported MIBs and RFCs Cmts to Cable Modem Network Topology Cmts to Cable Modem Network TopologyUnderstand How Basic Initialization Works Troubleshooting TipsUnderstand 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 Event 1-Wait for the Link to Come Up CmaclogresetfromdriverInterpret the MAC Log File and Take Action 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 7-Establish Security Event 5-Establish IP ConnectivityEvent 6-Establish the Time of Day Event 10-Comply with Baseline Privacy Event 8-Transfer Operational ParametersEvent 9-Perform Registration Use Additional Troubleshooting Commands Use Additional Troubleshooting CommandsEvent 11-Enter the Maintenance State Command PurposeCommand Reference Command ReferenceSyntax Description Command ModeShow controller cable-modem Usage GuidelinesRelated Commands UBR904# show controller cable-modem 0 bpkm Show controller cable-modem bpkmShow controller cable-modem 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 macShow controller cable-modem mac 014308 528311.396 Cmacloginitialrangingminislots014313 528315.936 Cmaclogadjustrangingoffset 014259 528302.046 CmaclogdriverinitidbshutdownUBR904# show controller cable-modem 0 mac errors CmaclogwatchdogtimerCmaclogresetdhcpwatchdogexpired CmaclogdhcpprocesskilledSample Displays Possible but Uncommon Cable Interface Reset CausesUBR904# show controller cable-modem 0 mac resets Message DescriptionCmaclogresetsecuritywatchdogexpired CmaclogresetprivacywatchdogexpiredCmaclogresetchangeuswatchdogexpired CmaclogresetallfrequenciessearchedCmaclogresetdstunerwatchdog CmaclogresetunabletosetmibobjectInterrupts Irqpend=0x0018, irqmask=0x00E7 DS ID UBR904# show controller cable-modem 0 mac stateTrue 64QAMUS ID Burst Descriptor Interval Usage CodeRanging Backoff Start D12=FFD3FFE0 Show controller cable-modem phyD11=FFD3FFAD 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 AccountingARP Show interface cable-modemUBR904# show int cable-modem 0 accounting UBR904# show int cable-modem 0 countersDebug Commands Debug CommandsBpkm Debug cable-modem bpkmDebug cable-modem bpkm UBR904# debug cable bpkmRelated Commands UBR904# debug cable-modem bridge Debug cable-modem bridgeDebug cable-modem bridge Debug cable-modem error Debug cable-modem errorSample Debug Cable-Modem Error Output UBR904# debug cable-modem interrupts Debug cable-modem interruptsDebug cable-modem interrupts Debug cable-modem mac UBR904# debug cable-modem mac log Debug cable-modem macSample Debug Cable-Modem Mac Log Output Debug cable mac messages UBR904# debug cable mac logUBR904# debug cable mac log verbose 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.