Cisco Systems UBR904 manual Cmts to Cable Modem Network Topology

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CMTS to Cable Modem Network Topology

CMTS to Cable Modem Network Topology

Figure 1 shows the physical relationship between the devices in the HFC network and the cable modem.

Figure 1 Sample Topology

ISP

IP-related

WAN

ATM, FDDI, 100BT...

 

100BT

Proxy server

Cisco uBR7246

CMTS

Analog TV

100BT

100BT

ISP @ home...

 

100BT

MSD: Maintenance Service

 

 

Organization, Cable companies

Upconvertor

 

DS-RF 54-860 Mhz

Digital TV

Fiber

Transceiver

80 km

1000 ft

Fiber node (Telephone pole, underground box)

Distribution Top

amplifier amplifier

Drop box

13304

Cisco u BR904

cable modem

4Release 11.3(4)NA

Image 4
Contents Feature Summary BenefitsFeature Summary List of TermsSupported MIBs and RFCs PrerequisitesList of Terms 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 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 6-Establish the Time of Day Event 5-Establish IP ConnectivityEvent 7-Establish Security Event 9-Perform Registration Event 8-Transfer Operational ParametersEvent 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 D11=FFD3FFAD Show controller cable-modem phyD12=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 Sample Debug Cable-Modem Error Output Debug cable-modem errorDebug cable-modem error Debug cable-modem interrupts Debug cable-modem interruptsUBR904# debug cable-modem interrupts Debug cable-modem mac Sample Debug Cable-Modem Mac Log Output Debug cable-modem macUBR904# debug cable-modem mac log UBR904# debug cable mac log verbose UBR904# debug cable mac logDebug 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.