Cisco uBR7225VXR User Manual

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

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Text Part Number: OL-17309-02

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The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without Cisco’s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California.

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Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

Document Revision History ix

Document Objectives ix

Audience x

Document Organization x

Document Conventions xi

Warning Definition xii

Obtaining Documentation and Submitting a Service Request xii

CHAPTER

1 Cisco uBR7225VXR Overview 1-1

Cisco uBR7225VXR Universal Broadband Router 1-1

Cisco uBR7225VXR Router Chassis 1-3

Cisco uBR7225VXR Network Interface Overview 1-4

Card Slot and Logical Interface Numbering 1-4 MAC-Layer Address 1-5

Supported System Configurations Overview 1-6

Basic Internet Access Services 1-6 VPN Services 1-8 IP Telephony Services 1-8 Telco Return 1-9

Hardware Component Descriptions 1-10

Network Processing Engine 1-10

NPE Comparisons 1-11 Cisco Cable Interface Line Cards 1-12 Power Supplies 1-13 Fan Trays 1-14 Cisco uBR7225VXR Chassis 1-17 Subchassis and Midplane 1-17

Cisco uBR7225VXR Subchassis 1-17 CompactFlash Disk 1-18

CHAPTER

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2 Preparing the Cisco uBR7225VXR Router for Installation 2-1

Safety Recommendations 2-1

Lifting the Cisco uBR7225VXR Router Safely 2-2 Safety with Electricity 2-3

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Contents

Preventing Electrostatic Discharge Damage 2-4

Site Requirements 2-5

AC Power 2-5 Site Environment 2-5 Site Configuration: Maintaining Normal Operation 2-6 General Precautions 2-6 Power Considerations 2-7

Required Network Information 2-7

Before You Begin 2-7

Installation Tools 2-8

Rack-Mount and Cable-Management Kit 2-8

Equipment Required to Verify Your Plant’s RF Setup 2-9

Shipping Container Contents 2-9

Verifying the Shipping Container Contents 2-9

Provisioning the Cable Headend 2-10

Two-Way Data and VoIP 2-10 Headend Certification 2-11 Diplex Filters 2-11 Receivers 2-11 DHCP, DNS, TFTP, and TD Servers 2-12 Telco Return 2-12

Dial-Up/Remote Access Servers 2-12

RADIUS Dial Security Servers 2-12 Authentication, Authorization, and Accounting Servers 2-13 VoIP Gateways and Gatekeepers 2-13 VoIP SGCP Pass-Through 2-13 Headend Wiring 2-14

Interference Considerations 2-14

Distance Limitations and Interface Specifications 2-14 Equipment Racks 2-15

Site Preparation Checklist 2-17

Component Checklists 2-18

CHAPTER

3 Installing the Cisco uBR7225VXR Router 3-1

Cisco uBR7225VXR Router Installation Checklist 3-1

Cisco uBR7225VXR Router Chassis Rack-Mounting Options 3-2

Cable-Management Bracket Requirements 3-5

Installing the Brackets on the Chassis 3-7

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Installing Rack-Mount Brackets on the Rear of the Chassis 3-7 Installing Rack-Mount Brackets on the Front of the Chassis 3-8 Installing Rack-Mount Brackets in the Middle of the Chassis 3-9 Installing the Chassis in the Rack 3-10

Installing the Chassis in a Workbench or Tabletop Environment 3-12

Installing the Cable-Management Bracket on a Cisco uBR7225VXR Router in a Workbench or Tabletop Environment 3-13

Cabling 3-13

Connecting Cable Interface Line Card Cables 3-14

Console and Auxiliary Port Connection Equipment 3-14

Console Port Signals 3-15 Auxiliary Port Signals 3-15

Protective Grounding 3-16

Connecting Power 3-16

Connecting to the AC-Input Power Supply 3-17

Contents

CHAPTER

Powering On the Cisco uBR7225VXR Router 3-18

Configuring the Interfaces 3-19

4 Connecting the Cisco uBR7225VXR Router to the Cable Headend 4-1

Two-Way Data Headend Architecture 4-2

One-Way Data Headend Architecture 4-3

RF and Digital Data Overview 4-3

Connecting and Configuring the Downstream 4-4

Installing and Configuring the Upconverter 4-4

Measuring the Downstream RF Signal 4-4

Measuring the Downstream RF Signal Using the Channel Power Option on a Spectrum Analyzer 4-5

Measuring the Downstream IF Signal at the Cisco uBR7225VXR Router 4-5 Measuring the Downstream RF Signal at the Upconverter Output 4-7

Measuring the Downstream RF Signal Using CATV Mode on a Spectrum Analyzer 4-11

Measuring the Downstream IF Signal at the Cisco uBR7225VXR Router Using CATV Mode 4-11 Measuring the Downstream RF Signal at the Upconverter Output Using CATV Mode 4-14

Connecting and Configuring the Upstream 4-18

Connecting the Upstream to the Optical Receiver 4-18 Testing the Upstream Configuration 4-19

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Measuring the Upstream RF Signal 4-22

Measuring the Upstream RF Signal Using a Spectrum Analyzer 4-22 Analyzing the Upstream RF Signal 4-25 Using the Zero-Span Method with Adjacent Upstream Channels 4-28

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Measuring the RF Signal at the Forward Test Point on a Laser Transmitter 4-37

Configuring the Digital Signal 4-40

CHAPTER

5 Maintaining the Cisco uBR7225VXR Router 5-1

Online Insertion and Removal 5-1

Environmental Monitoring and Reporting Functions 5-2

Environmental Monitoring 5-2 Reporting Functions 5-3 Fan Failures 5-6

6 Troubleshooting 6-1

Overview 6-1

Providing Information 6-1

Problem Solving with Subsystems 6-2

Identifying Startup Problems 6-3

Power Subsystem 6-4

Cooling Subsystem 6-4

Processor Subsystem 6-5

Troubleshooting the Network Processing Engine 6-5 Troubleshooting Cable Interface Line Cards 6-6 Other Troubleshooting Information Websites 6-7

APPENDIX

Verifying the Downstream Signal 6-7

A Cisco uBR7225VXR Router Specifications A-1

Cisco uBR7225VXR Physical and System Specifications A-1

B RF Specifications B-1

DOCSIS 1.0 Transmission Characteristics B-2

Downstream RF Channel Transmission Characteristics B-2 Upstream RF Channel Transmission Characteristics B-3

DOCSIS 1.1 Transmission Characteristics B-4

Downstream RF Channel Transmission Characteristics B-4 Upstream RF Channel Transmission Characteristics B-5

EuroDOCSIS Transmission Characteristics B-5

Downstream RF Channel Transmission Characteristics B-6 Upstream RF Channel Transmission Characteristics B-7

Electrical Input and Output B-8

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Contents

APPENDIX

C Cable Specifications C-1

Coaxial Cables C-1

Console and Auxiliary Port Cables and Pinouts C-2

Identifying an RJ-45 Rollover Cable C-2 Console Port Cables and Pinouts C-3 Auxiliary Port Cables and Pinouts C-4

Fast Ethernet Port Cables and Pinouts C-4

Identifying an RJ-45 Crossover Cable C-4 Identifying an RJ-45 Straight-Through Cable C-5

Fiber-Optic Cables and Connectors C-6

D Industry-Standard Wiring Plans D-1

About Wiring Standards D-1

TIA/EIA Standards Information D-2

Optical Fiber Color Codes D-2

Telephone Wire Color Codes D-3

E Frequency Allocation Tables E-1

APPENDIX

LOSSARY

NDEX

Standards Comparisons E-2

NTSC Cable Television Channels and Relative Frequencies E-3

NTSC (M) Cable Television Frequencies for Japan E-8

PAL/SECAM Cable Television Channels and Relative Frequencies E-10

F Manufacturers for Headend Provisioning Requirements F-1

North American Channel Plans F-1

European Channel Plans F-3

G Site Log G-1

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Preface

This preface describes the objectives, intended audience, and organization of this document and explains how to find additional information on related products and services.

This preface contains the following sections:

• Document Revision History, page ix

• Document Objectives, page ix

• Audience, page x

• Document Organization, page x

• Document Conventions, page xi

• Obtaining Documentation and Submitting a Service Request, page xii

Document Revision History

The Document Revision History table below records technical changes to this document.

Revision Date Change Summary

OL-17309-01 December 15, 2008 Original publication.

OL-17309-02 August 2012 Added information about the new 540 W AC-input power

Document Objectives

This guide provides hardware installation instructions for the Cisco uBR7225VXR universal broadband router.

The guide contains procedures to unpack, install, and connect the Cisco uBR7225VXR router hardware that enables your cable television (CATV) headend or distribution hub to support digital data and Voice-over-IP (VoIP) services. The guide includes procedures to characterize your cable plant to ensure that data services are reliably supported over the cable infrastructure.

supply.

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Audience

Preface

This guide is intended for cable system installers and technicians who physically install and connect the Cisco uBR7225VXR universal broadband router and associated equipment at the cable headend or distribution hub. Cable system installers and technicians should be familiar with their cable plant base operating parameters and service offerings.

The guide provides limited configuration information. After following applicable procedures in this guide, refer to the “Obtaining Documentation and Submitting a Service Request” section on page xii for related Cisco publications that more completely address configuration.

Warning

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Document Organization

This hardware installation guide is organized into the following chapters and appendixes:

Chapter Title Description

Chapter 1, “Cisco uBR7225VXR Overview”

Chapter 2, “Preparing the Cisco uBR7225VXR Router for Installation”

Chapter 3, “Installing the Cisco uBR7225VXR Router”

Chapter 4, “Connecting the Cisco uBR7225VXR Router to the Cable Headend”

Chapter 5, “Maintaining the Cisco uBR7225VXR Router”

Chapter 6, “Troubleshooting” Troubleshooting hardware installations.

Appendix A, “Cisco uBR7225VXR Router Specifications”

Appendix B, “RF Specifications” Recommended RF settings at the headend for both Data-over-Cable Service

Appendix C, “Cable Specifications” Cable and cable pinout information for the Cisco uBR7225VXR router.

Appendix D, “Industry-Standard Wiring Plans”

Appendix E, “Frequency Allocation Tables ”

About Cisco uBR7225VXR chassis and components.

Safety considerations, tools, and other equipment required to prepare your site.

Installing the chassis and connecting the power and network interface cables.

Connecting the Cisco uBR7225VXR router to a hybrid fiber-coaxial (HFC) network and configuring and measuring downstream and upstream portions of the HFC network.

Basic hardware maintenance instructions.

System specifications.

Interface Specifications (DOCSIS) and EuroDOCSIS networks.

The telephone industry color-code schemes for 25-pair wires including the pin numbers, optical fibers, and small wire pairs.

Information on the National Television System Committee (NTSC) frequency map for 6-MHz channel bands and the Phase Alternating Line (PAL) and SEquential Couleur Avec Memoire (SECAM) frequency map for 8-MHz channel bands.

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Preface

Appendix F, “Manufacturers for Headend Provisioning Requirements”

Manufacturers and websites required to prepare and provision a North American or a European cable headend to support digital data.

Appendix G, “Site Log” Example of a cable headend site log—Use to keep a historical record of actions

relevant to the Cisco uBR7225VXR router installation, operations, and maintenance.

Document Conventions

This publication uses the following conventions:

• The symbol ^ represents the key labeled Control. For example, the key combination ^z means hold

down the Control key while you press the z key.

Command descriptions use these conventions:

• Examples that contain system prompts denote interactive sessions, indicating the commands that

you should enter at the prompt. The system prompt indicates the current level of the EXEC command interpreter. For example, the prompt and the prompt

Router# indicates that you should be at the privileged level.

Access to the privileged level usually requires a password. For additional information, refer to the related software configuration and reference documentation listed in the Cisco uBR7200 Series Software Configuration Guide at the following URL:

Router> indicates that you should be at the user level,

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/configuration/guide/cr72scg.html

• Commands and keywords are in boldface font.

• Arguments for which you supply values are in italic font.

• Elements in square brackets ([ ]) are optional.

• Alternative but required keywords are grouped in braces ({ }) and separated by vertical bars (|).

Examples use these conventions:

• Terminal sessions and sample console screen displays are in screen font.

• Information you enter is in boldface screen font.

• Nonprinting characters, such as passwords, are in angle brackets (< >).

• Default responses to system prompts are in square brackets ([ ]).

• Exclamation points (!) at the beginning of a line indicate a comment line.

Caution Means reader be careful. You are capable of doing something that might result in equipment damage or

loss of data.

Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in

this manual.

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Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

Timesaver Means the described action saves time. You can save time by performing the action described in the

paragraph.

Tip Means the following information might help you solve a problem.

For all warning translations, refer to the Regulatory Compliance and Safety Information for Cisco uBR7200 Series Universal Broadband Routers at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/regulatory/compliance/ub72rcsi.html

Warning Definition

Preface

Warning

IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device.

Statement 1071

SAVE THESE INSTRUCTIONS

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

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CHAP T E R

Cisco uBR7225VXR Overview

This chapter describes the Cisco uBR7225VXR universal broadband router and contains the following sections:

• Cisco uBR7225VXR Universal Broadband Router, page 1-1

• Cisco uBR7225VXR Network Interface Overview, page 1-4

• Supported System Configurations Overview, page 1-6

• Hardware Component Descriptions, page 1-10

Cisco uBR7225VXR Universal Broadband Router

The Cisco uBR7200 series universal broadband routers, part of the Cisco Cable Modem Termination System (CMTS) solution, allows high-speed data services to be packaged similar to basic cable television service or video fare.

The router is based on Data-over-Cable Service Interface Specifications (DOCSIS) and supports data and packetized voice connectivity over a bidirectional cable television and IP backbone network. The Cisco uBR7200 series universal broadband routers typically concentrates traffic from DOCSIS- or EuroDOCSIS-based cable interfaces and cable modems (or set-top boxes with integrated DOCSIS or EuroDOCSIS cable modems) on the cable television network and presents that traffic to local and remote IP hosts. For cable plants not fully upgraded to support two-way cable transmission, the router works in conjunction with dial-up access products to support upstream traffic from DOCSIS-based cable interfaces connected to the Public Switched Telephone Network (PSTN). The router supports both 6-MHz North American channel plans using ITU-T J.83 Annex B operation and 8-MHz Phase Alternating Line (PAL) and SEquential Couleur Avec Memoire (SECAM) channel plans using ITU-T J.83 Annex A operation.

The Cisco uBR7200 series universal broadband routers contains some or all of the following:

• Cable interface line cards that interface to the cable television network. The Cisco uBR7225VXR

card set includes varying upstream-to-downstream interface ratios with differing bandwidth and modulation schemes supported, as well as the capability to dynamically perform complex spectrum management and operate in a 6-MHz or 8-MHz channel width environment. See the “Cisco Cable Interface Line Cards” section on page 1-12.

• One network processing engine (NPE) that performs system management functions for the chassis.

See the “Network Processing Engine” section on page 1-10.

• The Cisco uBR7225VXR router supports an optional redundant power supply. See the “Power

Supplies” section on page 1-13.

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1-1

Cisco uBR7225VXR Universal Broadband Router

• A midplane that serves as the interconnect between the cable interface line cards and the other

components of the system. See the “Subchassis and Midplane” section on page 1-17.

• A fan tray, enclosing internal fans that draw cooling air into the chassis to maintain an acceptable

operating temperature. See the “Fan Trays” section on page 1-14.

The cable interface cards, NPE, and power supplies slide into their respective chassis slots and connect directly to the router midplane. There are no internal cables to connect. The midplane distributes power from the power supplies to the cable interface cards, fan tray, and NPE.

The Cisco uBR7225VXR universal broadband router may be installed on a tabletop or rack-mounted. A rack-mount kit ships with each router. The rack-mount kit includes the hardware needed to mount the router in a standard 19-inch equipment rack or telco-type rack.

The Cisco uBR7200 series universal broadband routers supports:

• Environmental monitoring and reporting functions to resolve adverse environmental conditions

before loss of operation.

• Online insertion and removal (OIR), allowing key system components to be added or removed

without powering off the chassis.

Chapter 1 Cisco uBR7225VXR Overview

Caution You can remove and replace a cable interface line card with the same type of component without

interrupting the rest of the system or having to reconfigure the system. However, to replace a cable interface line card with a different type of card (for example, hot swapping from a Cisco uBR-MC16U cable interface line card to a Cisco uBR-MC28U cable interface line card), you must copy your startup configuration to your running configuration on the Cisco uBR7225VXR router to enable the interfaces on the new cable interface line card.

Caution The NPE does not support OIR. You must power down the chassis before removing the NPE.

Note For specific instructions to install, remove, or replace system components, refer to the documentation at

the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/tsd_products_support_series_home.html

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Cisco uBR7225VXR Router Chassis

The Cisco uBR7225VXR router chassis has:

• Two slots for cable interface cards

• One slot for a network processing engine

The front of the Cisco uBR7225VXR chassis provides access to two cable interface line cards. See

Figure 1-1.

The rear of the Cisco uBR7225VXR provides access to the network processing engine and up to two power supplies. See Figure 1-2.

A fully configured Cisco uBR7225VXR router can operate with only one installed power supply; however, a second, optional power supply of the same type provides hot-swappable, load-sharing, and redundant power. In a chassis using two power supplies, if one power supply fails or is removed, the redundant power supply immediately takes over the router’s power requirements and maintains normal operation without interruption.

The power supply has the router’s main power switch and an AC-input power receptacle. Mounting holes for a ground lug are located on the far right side on the rear of the chassis, to provide a chassis ground connection for ESD-preventive equipment. See Figure 3-13 on page 3-16.

Cisco uBR7225VXR Universal Broadband Router

Note Figure 1-2 shows the rear of a Cisco uBR7225VXR router configured with two 300W AC-input power

supplies.

Caution If you are using two power supplies, make sure that each one is plugged into a separate branch circuit.

A fully loaded router, with two installed power supplies (300 W) and all chassis slots filled, weighs approximately 48 pounds (21.8 kg). For clearance requirements and rack-mount installation considerations, refer to the “Site Environment” section on page 2-5.

Figure 1-1 Cisco uBR7225VXR Router—Front View

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Cable interface line card slot 1

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

Cable interface line card slot 2

1-3

Cisco uBR7225VXR Network Interface Overview

Figure 1-2 Cisco uBR7225VXR Router—Rear View

1 2 3 4 5

8 7 6

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AC-input power supply 2

AC-input power supply 1

Cisco uBR7225VXR Network Interface Overview

This section provides a functional overview of the network interfaces available on the Cisco uBR7225VXR universal broadband router, cable interface line card slot and logical interface numbering, as well as the MAC address assignments for cable interface line card interfaces.

Card Slot and Logical Interface Numbering

In the Cisco uBR7200 series universal broadband routers, the slot number is the chassis slot in which a cable interface card is installed.

Cable interface line card slots maintain the same slot number regardless of whether other cable interface line cards are installed or removed. However, when you move a cable interface line card to a different slot, the logical interface number changes to reflect the new slot number.

The MAC-layer or hardware address is a standardized data-link layer address that is required for certain network interface types. These addresses are specific and unique to each port. The Cisco uBR7225VXR uses a specific method to assign and control the MAC-layer addresses of its port adapters. For a description of the MAC-layer address, refer to the “MAC-Layer Address” section on page 1-5.

1-4

The two cable interface line cards in the Cisco uBR7225VXR router provide the connection between the router’s two PCI buses (mb1 and mb2) and external networks. See Figure 1-3.

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Chapter 1 Cisco uBR7225VXR Overview

Figure 1-3 Cisco uBR7255VXR Chassis and Cable Interface Line Cards

Cisco uBR7225VXR Network Interface Overview

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MAC-Layer Address

All LAN interfaces (ports) require unique MAC-layer addresses, also known as hardware addresses. Typically, the MAC address of an interface is stored on a memory component that resides directly on the interface circuitry; however, the OIR feature requires a different method. For a description of OIR, refer to the “Online Insertion and Removal” section on page 5-1.

The OIR feature allows you to remove a cable interface line card and replace it with another identically configured one. If the new cable interface line card matches the cable interface line card you removed, the system immediately brings it online. In order to allow OIR, an address allocator with a unique MAC address is stored in EPROM on the Cisco uBR7225VXR universal broadband router midplane. Each address is reserved for a specific slot in the router regardless of whether a cable interface line card resides in that slot.

The MAC addresses are assigned to the slots in sequence. This address scheme allows you to remove cable interface cards and insert them into other universal broadband routers without causing the MAC addresses to move around the network or be assigned to multiple devices.

Note Storing the MAC addresses for every slot in one central location means that the addresses stay with the

memory device on which they are stored.

Cable interface line card slot 2

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For information on the commands used to configure your Cisco uBR7225VXR router, refer to the Cisco IOS Configuration Fundamentals Configuration Guide at the following URL:

http://www.cisco.com/en/US/docs/ios/fundamentals/configuration/guide/12_4/cf_12_4_book.html

Also refer to the Cisco IOS Configuration Fundamentals Command Reference at the following URL:

http://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_book.html

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Supported System Configurations Overview

The Cisco uBR7200 series universal broadband routers is installed at a cable television headend or a distribution hub. Related networking and RF equipment, servers, and other host computers are installed, along with the Cisco uBR7225VXR router, to support digital data transmission.

To deliver data and VoIP services over the cable television system, TV channels are allocated to carry digital data. Data is modulated downstream on:

• 6-MHz channels in the 88 to 860 MHz range, using North American channel plans through

Cisco cable interface line cards installed in the chassis. For bidirectional cable plants, a portion of the 5 to 42 MHz range is used for upstream data transmission. For one-way cable plants or cable segments yet to be upgraded, DOCSIS-based cable interfaces configured for telco return are also supported.

• 8-MHz channels in the 108 to 862 MHz range using PAL/SECAM channel plans through

Cisco cable interface line cards installed in the chassis. For bidirectional cable plants, a portion of the spectrum in the 5 to 65 MHz range is used for upstream data transmission.

• 6-MHz channels in the 70 to 860 MHz range, using J-DOCSIS channel operation (extensions for

Japan and select regions) through Cisco cable interface line cards installed in the chassis. For bidirectional cable plants, a portion of the 5 to 55 MHz range is used for upstream data transmission.

The following sections illustrate the supported configurations including:

Chapter 1 Cisco uBR7225VXR Overview

• Basic Internet access services

• Virtual private network (VPN) services

• IP telephony services

• Telco return

Basic Internet Access Services

A Cisco uBR7225VXR universal broadband router is installed at the headend or distribution hub. The Cisco uBR7225VXR downstream cable interface line cards, with onboard upconvertor, translate the downstream signals to RF for broadcast. The Cisco uBR7225VXR router enables you to transmit downstream data in both the 6-MHz North American or Japanese and the 8-MHz European channel environments using the appropriate model of the cable interface line card.

Receivers, scramblers, and descramblers process the television signals to encode or decode signals as needed for broadcast. Modulators format the analog television and digital signals while upconverters change the carrier frequency of a modulated signal to a specified frequency. The analog TV channels and digitally modulated carriers then pass through the RF combiner.

The signals are broadcast from the headend through optical transmitters typically to fiber nodes in the network. Amplifiers, coaxial cable, and taps carry the signals to the subscriber premises. Signals are processed as follows:

• Set-top boxes (STBs), televisions, or VCRs receive analog and digital data signals.

• DOCSIS-based cable interfaces and STBs connected to customer premises equipment (CPE) receive

digital data signals:

1-6

–

Two-way cable interfaces transmit RF signals back through amplifiers to optical fiber receivers at the headend. These receivers pass the upstream signal to the upstream ports on the Cisco uBR7225VXR router for processing.

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Over the air

channels

Satellite

channels

Internet

Headend / Hub

Receivers Descramblers Scramblers

RF combiner

Subscriber

cable modem

Optical node

AM & digital modulators

Optical transmitter

Optical receiver

RF amplifiers

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Cisco uBR7225VXR

RF RF

Ta p

Upstream

Downstream

10Base-T

–

Telco return cable interfaces transmit over the PSTN. Dial-up servers and other equipment handle the upstream traffic and pass appropriate data to the Cisco uBR7225VXR routers. For telco return specifics, refer to the “Telco Return” section on page 1-9.

Figure 1-4 shows the architecture of a typical two-way hybrid fiber-coaxial (HFC) network, equipped to

support two-way data communication.

Figure 1-4 Two-Way HFC Cable Network Example

Supported System Configurations Overview

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Cisco provides a configuration tool—Cisco Network Registrar (CNR)—which is optimized for high performance automatic dynamic IP address allocation to cable interfaces, PCs, and other devices on the broadband network. Cisco also provides an integrated suite of configuration tools, including CNR, for relatively large cable networks called Cisco Subscriber Registration Center (CSRC). CSRC allows large-scale configuration and management of broadband modems. Leveraging the extensibility of CNR, CSRC enables and administers subscriber self-registration. The directory-enabled architecture of CSRC allows it to integrate with Lightweight Directory Access Protocol (LDAP) version 3 directory servers.

For more information on CSRC and CNR involvement in the cable network, refer to the CSRC and CNR documentation.

Cisco Network Registrar Install and Upgrade Guide at the following URL:

http://www.cisco.com/en/US/products/sw/netmgtsw/ps1982/prod_installation_guides_list.html

Cisco Subscriber Registration Centre Installation Guide at the following URL:

http://www.cisco.com/en/US/products/sw/netmgtsw/ps2181/products_installation_guide_chapter09186 a0080086f1a.html

Also refer to the Cisco uBR7200 Series Software Configuration Guide at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/configuration/guide/cr72scg.html

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Supported System Configurations Overview

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Branch

office

Secure

VPN

tunnels

Secure

VPN

tunnel

PSTN

Telecommuter

Internet

Corporate

Cisco

uBR7225VXR

VPN Services

The Cisco uBR7225VXR router supports VPN services. Figure 1-5 shows a typical VPN architecture. VPNs can be initiated at a cable modem residing at a subscriber site or can be initiated by the CMTS at the headend or distribution hub depending upon your particular Cisco IOS software image.

Figure 1-5 Two-Way VPN Network Example

Chapter 1 Cisco uBR7225VXR Overview

Note Many VPN architectures involve the use of encryption and decryption. Encryption and decryption are

subject to export licensing controls. For more information, refer to Regulatory Compliance and Safety Information for Cisco uBR7200 Series Universal Broadband Routers, at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/regulatory/compliance/ub72rcsi.html

IP Telephony Services

The Cisco uBR7225VXR router supports the transmission of packetized voice and facsimile traffic over the cable and IP backbone network. Figure 1-6 on page 1-9 shows a typical two-way configuration involving Voice-over-IP (VoIP) telephony services.

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Gatekeeper or

calling agents

Service

provider

backbone

HFC

cable plant

HFC

cable plant

Remote

cable modem

Remote

cable modem

Gateway/PSTN

Calling party

Residence or SOHO*

subscriber site 1

Residence or SOHO*

subscriber site 2

Called party

Policy server

*Small Office Home Office

Cisco

uBR7225VXR

Cisco

uBR7225VXR

Figure 1-6 Two-Way IP Telephony Network Example

Supported System Configurations Overview

Telco Return

In telco return configurations, the Cisco uBR7225VXR universal broadband router provides downstream data flow from cable interface line cards connected to the cable system and accepts upstream traffic via a combination of the local PSTN and IP network path that terminates at the Cisco uBR7225VXR router. Upstream data transmission takes place over a telephone modem (external or internal to a cable interface, as well as a cable interface line card in a PC, based on the third-party cable interface vendor) connected to an analog telephone line. Figure 1-7 on page 1-10 illustrates a telco return configuration.

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Hardware Component Descriptions

Figure 1-7 Telco Return Network Example

Chapter 1 Cisco uBR7225VXR Overview

IP network access

Cisco network

access server

Cisco

uBR7225VXR

IP network

RADIUS dial

security server

Headend or hub

DHCP TFTP TOD servers

Hardware Component Descriptions

Most Cisco uBR7225VXR universal broadband router components are field-replaceable units (FRUs). These units, unless otherwise noted, are OIR compatible. See the “Online Insertion and Removal”

section on page 5-1

FRU documentation (instructions on installing, removing, and replacing) is located at the following URL:

PPP connection between

remote cable modem

and network access server

established following

authentication

HFC downstream

including TCD messages

PSTN

Upstream

Subscriber

cable modem

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http://www.cisco.com/en/US/products/hw/routers/ps341/prod_installation_guides_list.html

The following components are described:

• Network Processing Engine, page 1-10

• Cisco Cable Interface Line Cards, page 1-12

• Power Supplies, page 1-13

• Fan Trays, page 1-14

• Cisco uBR7225VXR Chassis, page 1-17

• Subchassis and Midplane, page 1-17

• CompactFlash Disk, page 1-18

Network Processing Engine

The network processing engine (NPE) maintains and executes the system management functions for the Cisco uBR7225VXR router. The network processing engine performs the following system management functions:

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• Sending and receiving routing protocol updates

• Managing tables, caches, and buffers

• Monitoring interface and environmental status

• Providing Simple Network Management Protocol (SNMP) management and console/Telnet

interface

• Accounting and switching of data traffic

• Booting and reloading images

Refer to Network Processing Engine and Network Services Engine Installation and Configuration, for specifications, and removal and replacement instructions for these components. View the document online at the following URL:

http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/network_process_engine_install_ config/npense.html

A CPU reset button is located on the NPEs’ faceplate. The CPU reset button resets the entire system.

Caution To prevent system errors and problems, use the CPU reset button only at the direction of your service

representative.

Hardware Component Descriptions

NPE Comparisons

Note The Cisco uBR7200-NPE-G1 should use the boothelper image ubr7200-kboot-mz.122-33.SCA.bin

The network processing engines used in the Cisco uBR7225VXR router are the Cisco uBR7200-NPE-G1 and Cisco uBR7200-NPE-G2.

available from Cisco IOS Release 12.3(33)SCA and later. The Cisco uBR7200-NPE-G2 should use the boothelper image ubr7200p-boot-mz.122-33.SCA1.bin available from Cisco IOS Release 12.3(33)SCB and later.

NPE components:

• Reduced instruction set computing (RISC) microprocessor:

–

Cisco uBR7200-NPE-G1 with a 700-MHz Broadcom BCM1250 processor

–

Cisco uBR7200-NPE-G2 with a 1.67-GHz Motorola Freescale MPC7448 processor

• System controller:

–

Cisco uBR7200-NPE-G1 and Cisco uBR7200-NPE-G2 do not require an I/O controller.

• Upgradable memory modules:

–

Cisco uBR7200-NPE-G1—SDRAM: 256 MB (default), 512 MB, and 1 GB. There are two DRAM memory slots, so 256 MB of memory consists of two 128-MB memory SODIMMs, 512 MB consists of two 256-MB memory SODIMMs, and 1 GB consists of two 512-MB memory SODIMMs. It is necessary to have the same size SODIMM in each memory bank on an NPE-G1. The type of DRAM memory being used on the NPE-G1 is double data-rate (DDR) memory. DDR memory provides high-performance memory access rates.

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Hardware Component Descriptions

–

• Cache memory:

–

• Two environmental sensors for monitoring the cooling air as it leaves the chassis.

• Boot ROM for storing sufficient code for booting the Cisco IOS software.

For memory replacement instructions, refer to the Memory Replacement Instructions for the Network Processing Engine or Network Services Engine and Input/Output Controller document at the following

URL:

http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/npe-nse_memory_install/memory .html

Chapter 1 Cisco uBR7225VXR Overview

Cisco uBR7200-NPE-G2—SDRAM: 1 GB (default) and 2 GB. There are two DRAM memory slots, so 1 GB of memory consists of two 512-MB memory SODIMMs, and 2 GB consists of two 1 GB memory SODIMMs. It is necessary to have the same size SODIMM in each memory bank on an NPE-G2. The type of DRAM memory being used on the NPE-G2 is double data-rate (DDR) memory. DDR memory provides high-performance memory access rates.

Cisco uBR7200-NPE-G1—16-MB packet memory on 256-MB SDRAM, and 32-MB packet memory on 512-MB and 1-GB SDRAM.

Cisco uBR7200-NPE-G2—32-MB packet memory on 512-MB and 1-GB SDRAM.

Cisco Cable Interface Line Cards

Cisco cable interface line cards (also known as line cards), with internal IF-to-RF upconverters, serve as the RF interface between the cable headend and both DOCSIS-based cable modems and EuroDOCSIS-based cable modems and set-top boxes (STBs). Cisco cable interface line cards separate downstream output and upstream input cable interfaces on the Cisco uBR7225VXR router to enable downstream and upstream signal combining and splitting arrangements.

Cisco cable interface line cards can be used in both 6-MHz NTSC standard and 8-MHz PAL/SECAM channel environments.

The cable interface line cards connect directly to the universal broadband router’s midplane. Cable interface line cards installed in the Cisco uBR7225VXR router support OIR.

Caution To ensure the proper flow of cooling air across internal components, make sure that blank cable interface

line card is installed in an unoccupied chassis slot. Also make sure that power supply filler plates are installed in unoccupied power supply bays.

For more information regarding specific cable interface line cards, refer to the Cisco uBR7200 Series Cable Interface Line Card Hardware Installation Guide. To view the document online, go to the following URL:

http://www.cisco.com/en/US/docs/interfaces_modules/cable/line_cards/installation/guide/mcxxfru.htm l

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Power Supplies

The Cisco uBR7225VXR router is equipped with one of the following power supplies:

• 300W AC-input power supply—The maximum AC-input power with single or dual power supply

configuration is 300W. The minimum Cisco IOS Release supported on this power supply is the Cisco IOS Release 12.2(33)SCA.

• 540W AC-input power supply—The maximum AC-input power with single or dual power supply

configuration is less than 700W. The minimum Cisco IOS Release supported on this power supply is the Cisco IOS Release 12.2(33)SCD.

Note Ensure that you do not use a combination of these power supplies in the Cisco uBR7225VXR router.

The power supply contains a main power switch, Input OK and Output OK LEDs, AC-input power receptacle, and a two-hole grounding lug for the AC-input power supply. The grounding lug at the rear-bottom portion of the chassis provides a ground connection for electrostatic discharge (ESD) equipment.

The Cisco uBR7225VXR router supports an optional, second power supply for load-sharing and power redundancy. If you purchased a Cisco uBR7225VXR router and you want to install a second power supply, you must order the second power supply separately.

A handle on the AC-input power supply unit provides a grip point for removing and replacing the power supply. (Figure 1-8 on page 1-14 shows the faceplate of the AC-input power supply.)

Hardware Component Descriptions

A single captive installation screw secures the power supply to the chassis and seats the power supply in the router midplane. The AC-input power supply has a receptacle for an AC-input power cable. A modular power cable connects the AC-input power supply to the site AC power source.

Detailed instructions for handling and replacing the Cisco uBR7225VXR universal broadband router power supply is available in Cisco uBR7200 Series Universal Broadband Router AC Power Supply Replacement Instructions.

This document is available on Cisco.com at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/installation/4848pwra.html

Note For the Cisco uBR7225VXR router, the 300W AC-input power supply has an electrical input current

rating of 4A with 100Vac input and the 540W AC-input power supply has an electrical input current rating of 6.5A with 100Vac input.

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Hardware Component Descriptions

270698

PWR-UBR7225VXR-AC

100

-240 VA

C 4-2 A 50-60 Hz

Input

Output

Figure 1-8 Cisco uBR7225VXR AC-Input Power Supply

Chapter 1 Cisco uBR7225VXR Overview

Power switch

Handle

AC-input receptable

Captive installation screw

Caution To ensure adequate airflow across the Cisco uBR7225VXR power supplies, a power supply or a power

supply filler plate (with its attached air dam) must be installed in each power supply bay.

Note See Appendix A, “Cisco uBR7225VXR Router Specifications,” for AC-input power supply system

power specifications, including input voltage and operating frequency ranges.

The Cisco uBR7225VXR power supply shuts itself down when the input AC voltage, the output DC voltage, or the internal temperature of the chassis exceeds allowable tolerances. When this occurs, one or both of the power supply front panel LEDs will turn red. The Cisco uBR7225VXR power supply must then be reset by manually switching the power switch off and then back on to allow the router to recover.

Caution When the input power to Cisco uBR7225VXR power supply is disconnected or lost, the power supply

enters a reset cycle for 10 seconds. Wait at least 10 seconds or move the power switch from one position to the other to restart the power supply. For example, if the power supply was on when the power was disconnected or lost, move the power switch to the off position and then back to the on position. If you do not wait the full 10 seconds or move the power switch from one position to the other, the power supply does not restart.

Fan Trays

The fan tray for the Cisco uBR7225VXR router, shown in Figure 1-9, consisting of three fans that are attached to a metal tray, is located on the left side of the chassis (when viewing the router from the front) and receives 12 VDC through a DC power harness that connects directly to the router midplane.

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Temperature sensors on the network processing engine monitor the internal air temperature and send warning messages when the internal air temperature approaches a specified threshold. If the internal temperature exceeds the specified threshold, the system environmental monitor shuts down all internal power to prevent equipment damage from excessive heat.

Note The Cisco uBR7225VXR router fan tray is not a field-replaceable unit.

Figure 1-9 Cisco uBR7225VXR Fan Tray

Hardware Component Descriptions

270537

The fan tray draws cooling air in through the intake vent on the right side of the chassis (when viewing the router from the front) and moves the air across the internal components and sends it out through the exhaust vent on the left side of the chassis. Figure 1-10 shows the airflow through the router.

The left and right sides of the chassis must remain unobstructed to ensure adequate airflow and prevent overheating inside the chassis; we recommend at least 3 inches of clearance. (See the “Site

Requirements” section on page 2-5.)

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Hardware Component Descriptions

Figure 1-10 Internal Airflow—Top View

4 2

Chapter 1 Cisco uBR7225VXR Overview

Power supply end

Inlet flow

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Cable interface line card end

Exhaust air (fan side)

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-V

Cisco uBR7225VXR Chassis

The front of the chassis has two slots for cable interface line cards and one bay for the subchassis. See

Figure 1-11.

Figure 1-11 Cisco uBR7225VXR Chassis

Hardware Component Descriptions

Subchassis and midplane bay (at rear)

Cable interface line card slots

Subchassis and Midplane

The subchassis and midplane provide these functions for the Cisco uBR7225VXR router:

• Distributes power from the power supply.

• Bridges the peripheral component interconnect (PCI) buses from the cable interface line cards to the

Cisco uBR7200-NPE-G1 or the Cisco uBR7200-NPE-G2.

• Arbitrates traffic across the PCI buses.

Cisco uBR7225VXR Subchassis

The subchassis (the rear of the router) has two bays for power supplies and one slot for a network processing engine. (See Figure 1-12.) The cable interface card side of the Cisco uBR7225VXR router midplane has two connectors for cable interface line cards.

The power supply side of the midplane has two connectors for power supplies and one connector for a network processing engine. The midplane supplies DC power to the router’s internal components.

Refer to the Cisco uBR7200 Series Universal Broadband Router Subchassis and Midplane Replacement Instructions at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/installation/5193sbm.html

Fan tray

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Hardware Component Descriptions

Figure 1-12 Cisco uBR7225VXR Subchassis and Midplane

Chapter 1 Cisco uBR7225VXR Overview

To p

Back

Midplane

Fan tray slot

Power supply bays

Fan tray slot

CompactFlash Disk

The Cisco uBR7225VXR universal broadband router has one CompactFlash Disk slot that uses CompactFlash Disks. The device in this slot is always addressed as disk2: when using Cisco IOS command-line interface (CLI) commands.

CompactFlash Disks are smaller in size than Type 2 Flash Disks but provide the same AT Attachment (ATA) interface and equivalent functionality. This interface complies with the ANSI ATA Interface Document X3T13.1153 D Rev. 9 specification. The CompactFlash Disk provides 512 MB or 1 GB of storage space.

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Power supply receptacle

Captive installations screws (6)

Network processing engine slot

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+ 154 hidden pages

Cisco uBR7225VXR User Manual

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

CONTENTS

Preface

Cisco uBR7225VXR Overview

Cisco uBR7225VXR Universal Broadband Router

Cisco uBR7225VXR Router Chassis

Cisco uBR7225VXR Network Interface Overview

Card Slot and Logical Interface Numbering

MAC-Layer Address

Supported System Configurations Overview

Basic Internet Access Services

VPN Services

IP Telephony Services

Telco Return

Hardware Component Descriptions

Network Processing Engine

NPE Comparisons

Cisco Cable Interface Line Cards

Power Supplies

Fan Trays

Cisco uBR7225VXR Chassis

Subchassis and Midplane

Cisco uBR7225VXR Subchassis

CompactFlash Disk