THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO
CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS
MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY
PRODUCTS.
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Tel: 408 526-4000
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Text Part Number: OL-17309-02
THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE
INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU
ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A
COPY.
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.
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The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
AC Power2-5
Site Environment2-5
Site Configuration: Maintaining Normal Operation2-6
General Precautions2-6
Power Considerations2-7
Required Network Information2-7
Before You Begin2-7
Installation Tools2-8
Rack-Mount and Cable-Management Kit2-8
Equipment Required to Verify Your Plant’s RF Setup2-9
Shipping Container Contents2-9
Verifying the Shipping Container Contents2-9
Provisioning the Cable Headend2-10
Two-Way Data and VoIP2-10
Headend Certification2-11
Diplex Filters2-11
Receivers2-11
DHCP, DNS, TFTP, and TD Servers2-12
Telco Return2-12
Dial-Up/Remote Access Servers2-12
RADIUS Dial Security Servers2-12
Authentication, Authorization, and Accounting Servers2-13
VoIP Gateways and Gatekeepers2-13
VoIP SGCP Pass-Through2-13
Headend Wiring2-14
Interference Considerations2-14
Distance Limitations and Interface Specifications2-14
Equipment Racks 2-15
Installing Rack-Mount Brackets on the Rear of the Chassis3-7
Installing Rack-Mount Brackets on the Front of the Chassis3-8
Installing Rack-Mount Brackets in the Middle of the Chassis3-9
Installing the Chassis in the Rack3-10
Installing the Chassis in a Workbench or Tabletop Environment3-12
Installing the Cable-Management Bracket on a Cisco uBR7225VXR Router in a Workbench or
Tabletop Environment3-13
Cabling3-13
Connecting Cable Interface Line Card Cables3-14
Console and Auxiliary Port Connection Equipment3-14
Console Port Signals3-15
Auxiliary Port Signals3-15
Protective Grounding3-16
Connecting Power3-16
Connecting to the AC-Input Power Supply3-17
Contents
CHAPTER
Powering On the Cisco uBR7225VXR Router3-18
Configuring the Interfaces3-19
4Connecting the Cisco uBR7225VXR Router to the Cable Headend4-1
Two-Way Data Headend Architecture4-2
One-Way Data Headend Architecture4-3
RF and Digital Data Overview4-3
Connecting and Configuring the Downstream4-4
Installing and Configuring the Upconverter4-4
Measuring the Downstream RF Signal4-4
Measuring the Downstream RF Signal Using the Channel Power Option on a Spectrum Analyzer4-5
Measuring the Downstream IF Signal at the Cisco uBR7225VXR Router4-5
Measuring the Downstream RF Signal at the Upconverter Output4-7
Measuring the Downstream RF Signal Using CATV Mode on a Spectrum Analyzer4-11
Measuring the Downstream IF Signal at the Cisco uBR7225VXR Router Using CATV Mode4-11
Measuring the Downstream RF Signal at the Upconverter Output Using CATV Mode4-14
Connecting and Configuring the Upstream4-18
Connecting the Upstream to the Optical Receiver4-18
Testing the Upstream Configuration4-19
OL-17309-02
Measuring the Upstream RF Signal4-22
Measuring the Upstream RF Signal Using a Spectrum Analyzer4-22
Analyzing the Upstream RF Signal4-25
Using the Zero-Span Method with Adjacent Upstream Channels4-28
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.
RevisionDateChange Summary
OL-17309-01December 15, 2008 Original publication.
OL-17309-02August 2012Added 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.
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 TitleDescription
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”
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.
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,
TimesaverMeans the described action saves time. You can save time by performing the action described in the
paragraph.
TipMeans 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:
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:
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.
• 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.
1
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
• 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
CautionYou 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.
CautionThe NPE does not support OIR. You must power down the chassis before removing the NPE.
NoteFor specific instructions to install, remove, or replace system components, refer to the documentation at
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
NoteFigure 1-2 shows the rear of a Cisco uBR7225VXR router configured with two 300W AC-input power
supplies.
CautionIf 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.
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.
Figure 1-3Cisco 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.
NoteStoring 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
2
OL-17309-02
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:
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.
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 1-4Two-Way HFC Cable Network Example
Supported System Configurations Overview
OL-17309-02
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:
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 1-5Two-Way VPN Network Example
Chapter 1 Cisco uBR7225VXR Overview
NoteMany 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:
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.
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.
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:
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:
• 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:
A CPU reset button is located on the NPEs’ faceplate. The CPU reset button resets the entire system.
CautionTo prevent system errors and problems, use the CPU reset button only at the direction of your service
representative.
Hardware Component Descriptions
NPE Comparisons
NoteThe 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.
• 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
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.
CautionTo 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
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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.
NoteEnsure 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:
CautionTo 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.
NoteSee 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.
CautionWhen 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.
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.
NoteThe Cisco uBR7225VXR router fan tray is not a field-replaceable unit.
Figure 1-9Cisco uBR7225VXR Fan Tray
Hardware Component Descriptions
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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
The front of the chassis has two slots for cable interface line cards and one bay for the subchassis. See
Figure 1-11.
Figure 1-11Cisco uBR7225VXR Chassis
Hardware Component Descriptions
Subchassis and midplane bay (at rear)
1
Cable interface line card slots
2
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:
Figure 1-12Cisco uBR7225VXR Subchassis and Midplane
7
Chapter 1 Cisco uBR7225VXR Overview
1
To p
2
3
Back
Midplane
1
Fan tray slot
2
Power supply bays
3
Fan tray slot
4
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.