Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
Chapter 1: Cisco uBR7200 Series Overview
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Cisco uBR7200 Series Overview

Table Of Contents

Cisco uBR7200 Series Overview

Cisco uBR7200 Series Universal Broadband Router

Cisco uBR7246 Router

Cisco uBR7246VXR Router

Cisco uBR7200 Series Network Interface Overview

Card Slot and Logical Interface Numbering

Cisco uBR7246

Cisco uBR7246VXR

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

Input/Output Controller

Cisco Cable Interface Line Cards

Cisco Cable Clock Card (Cisco uBR7246VXR Only)

Cisco Port Adapters

Cisco Port Adapter-Chassis-Release Matrix

Power Supplies

Fan Trays

Cisco uBR7246 and Cisco uBR7246VXR Chassis

Subchassis and Midplane

Cisco uBR7246VXR and Cisco uBR7246 Subchassis

Flash Memory Cards

CompactFlash Disk


Cisco uBR7200 Series Overview


This chapter describes the Cisco uBR7200 series universal broadband routers and contains the following sections:

Cisco uBR7200 Series Universal Broadband Router

Cisco uBR7200 Series Network Interface Overview

Supported System Configurations Overview

Hardware Component Descriptions

Cisco uBR7200 Series Universal Broadband Router

The Cisco uBR7200 series universal broadband routers comprise the Cisco Cable Modem Termination System (CMTS) solution. Two different chassis are available: the Cisco uBR7246 and Cisco uBR7246VXR. The routers allow high-speed data services to be packaged similar to basic cable television service or video fare.

The routers are based on Data-over-Cable Service Interface Specifications (DOCSIS) and support data and packetized voice connectivity over a bidirectional cable television and IP backbone network. The Cisco uBR7200 series routers typically concentrate 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 present that traffic to local and remote IP hosts. For cable plants not fully upgraded to support two-way cable transmission, the routers work 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 routers support 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.

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

Cable interface line cards that interface to the cable television network. The Cisco uBR7200 series 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.

Port adapters used in Cisco uBR7200 series universal broadband routers connect to the IP backbone and external networks.
See the "Cisco Port Adapters" section.

A Cisco cable clock card that allows you to lock onto and propagate a T1 clock signal throughout the router midplane. The cable clock card is used only in the Cisco uBR7246VXR.
See the "Cisco Cable Clock Card (Cisco uBR7246VXR Only)" section.

One network processing engine (NPE) that performs system management functions for the chassis. See the "Network Processing Engine" section. Table 1-1 shows the NPEs supported in each universal broadband router chassis.

An I/O controller shares the system memory functions and the environmental monitoring functions with the network processing engine. See the "Input/Output Controller" section.

The Cisco uBR7246 and Cisco uBR7246VXR routers support an optional redundant power supply. See the "Power Supplies" section.

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.

A fan tray, enclosing internal fans that draw cooling air into the chassis to maintain an acceptable operating temperature. See the "Fan Trays" section.

The cable interface cards, port adapters, cable clock card, NPE, I/O controller, and power supplies slide into their respective chassis slots and connect directly to the routers midplane. There are no internal cables to connect. The midplane distributes power from the power supplies to the I/O controller, cable interface cards, port adapters, cable clock card, fan tray, and NPE.

Cisco uBR7200 series universal broadband routers 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 support:

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.


Caution You can remove and replace a cable interface card or port adapter 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 card or port adapter with a different type of card or port adapter, (for example, hot swapping from a Cisco MC16B to a Cisco MC16C or replacing a high-speed serial interface [HSSI] adapter with an ATM adapter), you must copy your startup configuration to your running configuration on the Cisco uBR7200 series routers to enable the interfaces on the new cable interface line card or port adapter.


Caution The I/O controller, NPE, and cable clock card components do not support OIR. You must power down the chassis before removing the I/O controller, the NPE, or the cable clock card.


Note For specific instructions to install, remove, or replace system components, refer to the configuration notes that ship with the field-replaceable units or see the documentation at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/cable/cab_rout/cfig_nts/index.htm.


Cisco uBR7246 Router


Note This product is end of sale (EOS).


The Cisco uBR7246 router chassis has:

Four slots for cable interface cards

Two slots for port adapters (one slot for a dual-width port adapter)

One slot for an I/O controller

One slot for a network processing engine

A fully configured Cisco uBR7246 router can operate with only one installed power supply. A second power supply may be installed in the chassis to provide load-sharing, redundant power, and hot-swappable capabilities. In a chassis using two power supplies, if one power supply fails or is removed, the other power supply immediately takes over the router's power requirements and maintains normal operation without interruption. See Figure 1-1 and Figure 1-2.


Caution If you are using two power supplies, ensure that each power supply is plugged into a separate branch circuit.


Note The Cisco uBR7246 router does not support a mix of AC-input and DC-input power supplies in the same chassis. If an AC-input power supply is installed and you want to add a second, redundant power supply, you must add another AC-input power supply. If you want a redundant DC-input power supply configuration, you must remove any installed AC-input power supplies and replace them with two DC-input power supplies.


A fully configured Cisco uBR7246 router, with two installed power supplies and all chassis slots filled, weighs approximately 100 pounds (45.4 kg). For clearance requirements and rack-mount installation considerations, refer to the "Site Environment" section on page 2-6.

Cisco uBR7246VXR Router

The Cisco uBR7246VXR router chassis has:

Four slots for cable interface cards

Two slots for port adapters (one slot for a dual-width port adapter)

One slot for an I/O controller

One slot for a network processing engine

One slot for the cable clock card

The front of the chassis provides access to the I/O controller, two port adapters, four cable interface cards, and the cable clock card, if fully equipped. See Figure 1-1.

The rear of the Cisco uBR7246VXR provides access to the network processing engine and up to two power supplies. See Figure 1-2.

A fully configured Cisco uBR7246VXR 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 either an AC-input power receptacle, or three hardwired DC-input power leads (depending on the type of installed power supply). Two chassis grounding receptacles adjacent to the lower power supply bay, provide a chassis ground connection for ESD-preventive equipment or a two-hole grounding lug. (See Figure 1-2.).


Note Figure 1-2 shows the rear of a Cisco uBR7246VXR router configured with two 280W 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 and all chassis slots filled, weighs approximately 100 pounds (45.4 kg). For clearance requirements and rack-mount installation considerations, refer to the "Site Environment" section on page 2-6.


Note The Cisco uBR7246 and Cisco uBR7246VXR routers have the same form factor. However, only the Cisco uBR7246VXR router has a cable clock card.


Figure 1-1 Cisco uBR7246VXR RouterFront View

Figure 1-2 Cisco uBR7246VXR RouterRear View

Cisco uBR7200 Series Network Interface Overview

This section provides a functional overview of the network interfaces available on the Cisco uBR7200 series universal broadband router, port adapter and cable interface card slot and logical interface numbering, as well as the MAC address assignments for port adapter and cable interface card interfaces.

Card Slot and Logical Interface Numbering

In all of the Cisco uBR7200 series universal broadband routers, the slot number is the chassis slot in which a port adapter or a cable interface card is installed, and the logical interface number is the physical location of the interface port on a port adapter.

Port adapter and cable interface card slots maintain the same slot number regardless of whether other port adapters or cable interface cards are installed or removed. However, when you move a port adapter or cable interface 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 uBR7200 series 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.

Cisco uBR7246

The two port adapters (slot 1 and slot 2) and the four cable interface cards (slot 3 through slot 6) in the Cisco uBR7246 provide the connection between the router's three PCI buses (mb0, mb1, and mb2) and external networks. Bus mb0 is for the optional Fast Ethernet port on the I/O controller (slot 0); bus mb1 is for port adapter slot 1, and cable interface card slot 3 and slot 5; and bus mb2 is for port adapter slot 2 and cable interface card slot 4 and slot 6.

See Figure 1-3 for slot locations and slot numbers. The number of logical interfaces depends on the type of port adapter or cable interface card.

Figure 1-3 Cisco uBR7246 Port Adapter and Cable Interface Line Card Slot Numbering

Cisco uBR7246VXR

The two port adapters and the four cable interface cards in the Cisco uBR7246VXR provide the connection between the router's three PCI buses (mb0, mb1, and mb2) and external networks. Bus mb0 is for the optional Fast Ethernet port on the I/O controller, bus mb1 is for port adapter slot 1, and cable interface card slot 3 and slot 5; and bus mb2 is for port adapter slot 2 and cable interface card slot 4 and slot 6.

The Cisco uBR7246VXR port adapter slots are numbered 1 and 2; port adapter slot 0 is the Fast Ethernet port on the I/O controller. Cable interface line card slots are numbered from 3 to 6. See Figure 1-4 for a description of the port adapter and cable interface card slots. The number of logical interfaces depends on the type of port adapter or cable interface card.


Note Some port adapters available for the Cisco uBR7246VXR only work if a minimum hardware revision requirement has been satisfied. For specific information, 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


Figure 1-4 Cisco uBR7246VXR Chassis Port and Cable Interface Line Card Locations

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 1

The OIR feature allows you to remove a port adapter or cable interface card and replace it with another identically configured one. If the new port adapter or cable interface card matches the port adapter or cable interface 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 universal broadband router midplane. Each address is reserved for a specific port and slot in the router regardless of whether a port adapter or a cable interface card resides in that slot.

The MAC addresses are assigned to the slots in sequence. The first addresses are assigned to port adapter slot 0 and slot 1, and the next addresses are assigned to port adapter slot 2 through cable interface card slot 6. This address scheme allows you to remove port adapters or 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.


For information on the commands used to configure your Cisco uBR7200 series, refer to the Cisco IOS Configuration Fundamentals Configuration Guide at the following URL:

http://www.cisco.com/en/US/docs/ios/12_2/configfun/configuration/guide/ffun_c.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

Supported System Configurations Overview

Cisco uBR7200 series universal broadband routers are 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 uBR7200 series routers, 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 via 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 MC16E cable interface 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.

The following sections illustrate the supported configurations including:

Basic Internet access services

Virtual private network (VPN) services

IP telephony services

Telco return

Basic Internet Access Services

A Cisco uBR7200 series universal broadband router and an external IF-to-RF upconverter are installed at the headend or distribution hub. The Cisco uBR7200 series downstream ports transmit IF signals to the upconverter, which translates the downstream signals to RF for broadcast. The Cisco uBR7200 series enables you to transmit downstream data in both the 6-MHz North American 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:

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 uBR7200 series 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 uBR7200 series routers. For telco return specifics, refer to the "Telco Return" section.

Figure 1-5 shows the architecture of a typical two-way hybrid fiber-coaxial (HFC) network, equipped to support two-way data communication.

Figure 1-5 Two-Way HFC Cable Network Example

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 at the following URL:

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

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

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

VPN Services

The Cisco uBR7200 series supports VPN services. Figure 1-6 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 1-6 Two-Way VPN Network Example


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 the 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 uBR7200 series supports the transmission of packetized voice and facsimile traffic over the cable and IP backbone network. Figure 1-7 shows a typical two-way configuration involving Voice-over-IP (VoIP) telephony services.

Figure 1-7 Two-Way IP Telephony Network Example

Telco Return

In telco return configurations, the Cisco uBR7200 series universal broadband router provides downstream data flow from cable interface 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 uBR7200 series router. Upstream data transmission takes place over a telephone modem (external or internal to a cable interface, as well as a cable interface card in a PC, based on the third-party cable interface vendor) connected to an analog telephone line. Figure 1-8 illustrates a telco return configuration.

Figure 1-8 Telco Return Network Example

Hardware Component Descriptions

Most Cisco uBR7200 series universal broadband router components are field-replaceable units (FRUs). These units, unless otherwise noted, are OIR compatible. See "Online Insertion and Removal" section on page 5-1

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

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

The following components are described:

Network Processing Engine

Input/Output Controller

Cisco Cable Interface Line Cards

Cisco Cable Clock Card (Cisco uBR7246VXR Only)

Cisco Port Adapters

Power Supplies

Cisco uBR7246 and Cisco uBR7246VXR Chassis

Subchassis and Midplane

Flash Memory Cards

Network Processing Engine

The network processing engine (NPE) maintains and executes the system management functions for the Cisco uBR7200 series routers. The NPE also shares the system memory and environmental monitoring functions with the I/O controller. The NPE performs the following system management functions:

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

Managing port adapters (recognition and initialization during OIR)

Refer to Network Processing Engine and Network Services Engine Installation and Configuration Guide, 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

NPE Comparisons

The network processing engines used in the routers include the NPE-150, NPE-200, NPE-225, NPE-300, NPE-400, Cisco uBR7200-NPE-G1, and Cisco uBR7200-NPE-G2.


Note The NPE-150, NPE-200, and NPE-300 are end of life products.


Table 1-1 NPEs Supported in Universal Broadband Router Chassis

Chassis
Supported NPEs

Cisco uBR7246

NPE-150, NPE-200, NPE-225

Cisco uBR7246VXR

NPE-225, NPE-300, NPE-400, Cisco uBR7200-NPE-G1, Cisco uBR7200-NPE-G2


NPE components:

Reduced instruction set computing (RISC) microprocessor:

NPE-150 with an R4700 microprocessor that operates at an internal clock speed of 150 MHz.

NPE-200 with an RM5270 microprocessor that operates at an internal clock speed of 200 MHz.

NPE-225 with an RM5271 microprocessor that operates at an internal clock speed of 262 MHz.

NPE-300 with an RM7000 microprocessor that operates at an internal clock speed of 262 MHz.

NPE-400 with an RM7000 microprocessor that operates at an internal clock speed of 350 MHz.

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:

NPE-150, NPE-200, and NPE-225 have a system controller that uses direct memory access (DMA) to transfer data between DRAM and packet static random access memory (SRAM) on the network processing engine.

NPE-300 has two system controllers that provide processor access to the two midplane and single I/O controller PCI buses. The system controllers also allow port adapters on either of the two midplane PCI buses access to SDRAM.

NPE-400 has a single system controller.

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

Upgradable memory modules:

NPE-150 and NPE-200 use DRAM for storing routing tables, network accounting applications, packets of information in preparation for process switching, and packet buffering for SRAM overflow. The standard configuration is 32 MB, with up to 128 MB available through single in-line memory module (SIMM) upgrades.

NPE-225 uses SDRAM for providing code, data, and packet storage.

NPE-300 and NPE-400 use SDRAM for storing all packets received or sent from network interfaces. The SDRAM also stores routing tables and network accounting applications. Two independent SDRAM memory arrays in the system allow concurrent access by port adapters and the processor.

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.

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, 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.

Packet SRAM for storing packets of information in preparation for fast switching:

NPE-150 has 1 MB of SRAM.

NPE-200 has 4 MB of SRAM.

NPE-225, NPE-300, and NPE-400 do not have packet SRAM.

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.

Cache memory:

NPE-150 and NPE-200 have unified cache SRAM that functions as the secondary cache for the microprocessor. (The primary cache is within the microprocessor.)

NPE-225, NPE-300, and NPE-400 have three levels of cache: a primary and a secondary cache that are internal to the microprocessor, and a tertiary, 2-MB external cache that provides additional high-speed storage for data and instructions.

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.

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.


Note To prevent DRAM errors in the NPE-150 or NPE-200, and to ensure that your system initializes correctly at startup, DRAM bank 0 (socket U18 and U25, or U11 and U25) must contain no fewer than two SIMMs of the same type. You may also install two SIMMs of the same type in bank 1 (socket U4 and U12, or U42 and U52); however, bank 0 must always contain the two largest SIMMs.



Note The NPE-225 does not have packet SRAM.



Note Both the NPE-300 and the NPE-400 are keyed to prevent insertion into the Cisco uBR7246 router.


Input/Output Controller


Note Cisco uBR7200-NPE-G1 and Cisco uBR7200-NPE-G2 does not require the use of an I/O controller.


The I/O controller shares the memory functions and the environmental monitoring functions with the NPE or the network services engine (NSE). The I/O controller contains the following components:

Dual EIA/TIA-232 channels for local and auxiliary console ports. The console port has full data communications equipment (DCE) functionality and a DB-25 receptacle. The auxiliary port has full data terminal equipment (DTE) functionality and a DB-25 plug.

Optional Fast Ethernet port that is configurable for use at 100-Mbps full-duplex or half-duplex (half-duplex is the default). The Fast Ethernet port is equipped with an MII receptacle and an RJ-45 receptacle. There is no functional difference between the I/O controllers with the Fast Ethernet port and the I/O controllers without the Fast Ethernet port.


Note When using the I/O controller that is equipped with an MII receptacle and an RJ-45 receptacle, only one receptacle can be configured for use at a time.



Note Many of the initial shipments of the Cisco uBR7246 chassis that were equipped with a Fast Ethernet I/O controller have an I/O controller with a single MII receptacle installed. These I/O controllers are fully compatible with the router, and they are still supported; however, they are no longer available as spares.


Nonvolatile random-access memory (NVRAM) for storing the system configuration and environmental monitoring logs. NVRAM uses lithium batteries to maintain its contents when disconnected from power.

Two PCMCIA slots for Type II flash memory cards.

Flash memory SIMM and flash memory cards for storing the boot helper image and the default Cisco IOS software image.

Erasable programmable read-only memory (EPROM) for storing sufficient code for booting the Cisco IOS software.

Two environmental sensors for monitoring the cooling air as it enters and leaves the Cisco uBR7200 series chassis.

Table 1-2 lists the I/O controller memory components.

Table 1-2 I/O Controller Memory Components 

Memory Type
Size
Quantity
Description
Location

Boot ROM

256 KB

1

EPROM for the ROM monitor program

Socket U20

Flash SIMM

4 MB or
8 MB

1

Contains the default boot helper image

Socket U99 or U10, U11, U12, and U13 or U13 and U25 (soldered)

Flash memory card

20 MB

Up to 2

Contains the default Cisco IOS image

PCMCIA slot 0 and slot 1

Flash card

48 MB or
128 MB

Up to 2

Contains the default Cisco IOS image

PC card slot 0 and slot 1

NVRAM

128 KB

1

Nonvolatile EPROM for the system configuration file

Socket U41 or U14 (soldered)


For memory replacement instructions refer to Memory Replacement Instructions for the Network Processing Engine or Network Services Engine and Input/Output Controller. To view the document online, go to the following URL:

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

For I/O controller replacement instructions, refer to Input/Output Controller Replacement Instructions. To view the document online. go to the following URL:

http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/7200_i.o_controller_install/4447io.html

Depending on whether the Fast Ethernet port is present, either two or four LEDs on the I/O controller faceplate indicate system status; two additional LEDs indicate the status of the flash memory cards installed in either PCMCIA slot.

A CPU reset button is located next to the IO PWR OK LED on the I/O controller 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.


Tip If you order an I/O controller as a spare for a Cisco uBR7200 series, use the product numbers UBR7200-I/O= (without a Fast Ethernet port) or UBR7200-I/O-FE= (with a Fast Ethernet port). These I/O controllers have the Cisco IOS software images used by the Cisco uBR7200 series loaded on the flash memory SIMMs.


Cisco Cable Interface Line Cards

Cisco cable interface line cards (also known as line cards), together with external 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 uBR7200 series universal broadband 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 cards connect directly to the universal broadband router's midplane. Cable interface line cards installed in the Cisco uBR7200 series router support OIR. The downstream ports must be connected to external IF-to-RF upconverter hardware.


Caution To ensure the proper flow of cooling air across internal components, make sure that blank cable interface line cards, blank port adapters, and blank cable clock cards are installed in unoccupied chassis slots. Also make sure that power supply filler plates (with their attached air dams) 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.html

Cisco Cable Clock Card (Cisco uBR7246VXR Only)

The cable clock card works only with the Cisco MC16S or Cisco MC16E cable interface line cards and the Cisco uBR7246VXR router. The cable modem must also support the clocking mode.

The Cisco cable clock card is a dual-port field-replaceable component that is designed to provide a reliable national clock signal to the Cisco uBR7246VXR. The primary and secondary DB-15 interfaces on the front of the cable clock card connect to external T1 clock signal sources.

When installed in the Cisco uBR7246VXR chassis, the cable clock card can propagate a national clock signal throughout the router's midplane by locking onto an external T1 signal originating over the PSTN, by locking onto a T1 clock signal originating from a port adapter installed in the same chassis, or by connecting to a Global Positioning System (GPS) receiver generating a T1 clock signal. The cable clock card does not support OIR.


Caution To ensure adequate airflow across the router's components, a cable clock card or a blank cable clock card cover plate must be installed in the cable clock card slot on the Cisco uBR7246VXR.

For detailed information on the cable clock card refer to Cisco Cable Clock Card for the Cisco uBR7246VXR Universal Broadband Router at the following URL:

http://www.cisco.com/en/US/docs/ios/12_1t/12_1t1/feature/guide/natlclck.html


Note Refer to Appendix F, "Manufacturers for Headend Provisioning Requirements" for a list of external T1 component suppliers that Cisco recommends.


Cisco Port Adapters

The port adapters serve as a WAN interface and connect directly to the Cisco uBR7200 series universal broadband router's midplane. Port adapters installed in the Cisco uBR7200 series support OIR. For a complete list of port adapters supported in the various Cisco uBR7200 series routers, see Table 1-3, refer to the Cisco uBR7200 Series Software Configuration Guide, or the latest Cisco IOS Release Note.

For the Cisco uBR7200 Series Software Configuration Guide, go to the following URL:

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

For Cisco IOS Release Notes, go to the following URL:

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

For port adapter and HSSI installation information, see the port adapter configuration notes at the following URL:

http://www.cisco.com/en/US/docs/interfaces_modules/port_adapters/install_upgrade/cables_and_attenuator/hssi_cable_install/HSSIcab.html


Caution To ensure adequate airflow across the router's port adapters, a port adapter or a blank port adapter must be installed in each port adapter slot.

Cisco Port Adapter-Chassis-Release Matrix

Table 1-3 lists current Cisco uBR7200 series port adapters and identifies the chassis and release trains on which the port adapter is supported.

Table 1-3 Cisco uBR7200 Series Port Adapter, Chassis, and Cisco IOS Release Compatibility 

Product Number
Cisco uBR7246
Cisco uBR7246VXR
Ethernet

PA-4E—4-port Ethernet 10Base-T port adapter

11.3(8)NA, 12.0(1)T, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

12.0(7)SC, 12.0(7)T, 12.1(1a)T1 1 , 12.1 EC

PA-8E—8-port Ethernet 10Base-T port adapter

11.3(8)NA, 12.0(1)T, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

12.0(7)SC, 12.0(7)T, 12.1(1a)T1 2 , 12.1 EC

PA-FE-FX—1-port 100Base-FX Fast Ethernet port adapter

11.3(8)NA, 12.0(1)T, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

12.0(7)SC, 12.0(7)T, 12.1(1a)T1, 12.1 EC

PA-FE-TX—1-port 100Base-TX Fast Ethernet port adapter

11.3(8)NA, 12.0(1)T, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

12.0(7)S, 12.1(1a)T1C, 12.0(7)T, 12.1 EC

PA-2FEISL-FX—2-port 100BASE-FX Fast Ethernet port adapter with Inter-Switch Link (ISL) support

12.0(5)T1, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

12.0(7)SC, 12.0(7)T, 12.1(1a)T1, 12.1 EC

PA-2FEISL-TX—2-port 100BASE-TX Fast Ethernet port adapter with Inter-Switch Link (ISL) support

12.0(5)T1, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

12.0(7)SC, 12.0(7)T, 12.1(1a)T1, 12.1 EC

PA-12E/2FE—12-port 10Base-T and 2-port 10/100Base-TX port adapter

12.0(5)T1, 12.0(6)SC, 12.1(1a)T1, 12.1 EC

Not applicable

Gigabit Ethernet

PA-GE—1-port, full-duplex, IEEE 802.3z-compliant Gigabit Ethernet (GE) port adapter3

Not applicable

12.0(7)T, 12.1(1a)T1,
12.1 EC

Serial

PA-4T+—4-port synchronous serial port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(1a)T1, 12.1 EC

PA-8T-232—8-port EIA/TIA-232 synchronous serial port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-8T-V35—8-port V.35 synchronous serial port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-8T-X21—8-port X.21 synchronous serial port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-4E1G-75—4-port unbalanced (75-ohm) E1-G.703/G.704 synchronous serial port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(3)T, 12.1 EC

PA-4E1G-120—4-port balanced (120-ohm) E1-G.703/G.704 synchronous serial port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(3)T, 12.1 EC

PA-E3—1-port high-speed serial E3 interface port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(3)T, 12.1 EC

PA-T3—1-port T3 serial interface port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(3)T, 12.1 EC

PA-2E3—2-port high-speed serial E3 interface port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(3)T, 12.1 EC

PA-2T3—2-port T3 serial interface port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.1(3)T, 12.1 EC

PA-MC-E3—1-port multichannel E3, medium-speed serial interface port adapter

12.0(1)T, 12.1(1a)T,
12.1 EC

Not applicable

PA-MC-T3—1-port T3 (channelized into 28 independent T1 data lines) port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-MC-4T1—4-port multichannel DS1 ISDN PRI single-wide port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-MC-8E1/120—8-port multichannel E1 ISDN PRI single-wide port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-MC-8T1—8-port multichannel DS1 ISDN PRI single-wide port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

HSSI

PA-H—1-port HSSI port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T14 ,
12.1 EC

PA-2H—2-port HSSI port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T15 ,
12.1 EC

ATM

PA-A1-OC3SMI—1-port ATM OC-3c/STM-1 single-mode intermediate reach port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A1-OC3MM—1-port ATM OC-3c/STM-1 multimode port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A2-4E1XC-OC3SM—5-port ATM CES6 (4 E1 120-ohm CBR 7 ports and 1 OC-3 ATM single-mode port) port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A2-4E1XC-E3ATM—5-port ATM CES
(4 E 120-ohm CBR ports and 1 E3 ATM port) port adapter

12.0(1)T, 12.1(1a)T,
12.1 EC

Not applicable

PA-A2-4T1C-OC3SM—5-port ATM CES6 (4 T1 CBR7 ports and 1 OC-3 ATM single-mode port) port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A2-4T1C-T3ATM—5-port ATM CES6 (4 T1 CBR7 ports and 1 T3 ATM port) port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A3-E3—1-port E3 ATM, PCI-based port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A3-T3—1-port T3 ATM, PCI-based port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

Not applicable

PA-A3-OC3MM—1-port OC-3c ATM, PCI-based multimode port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

PA-A3-OC3SMI—1-port OC-3c ATM, PCI-based single-mode intermediate reach port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

PA-A3-OC3SML—1-port OC-3c ATM,

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

PCI-based single-mode long reach port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

Packet-Over-SONET (POS)

PA-POS-OC3SML—1-port POS OC-3 single-mode, long reach port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

PA-POS-OC3SMI—1-port OC3 single-mode, intermediate reach port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

PA-POS-OC3MM—1-port POS OC3 multimode port adapter

12.0(1)T, 12.1(1a)T1,
12.1 EC

12.0(7)T, 12.1(1a)T1,
12.1 EC

Dynamic Packet Transport (DPT)

PA-SRP-OC12SMX—2-port SRP8 OC12 single-mode, extended reach port adapter

12.1(1a)T, 12.1 EC

12.1(1a)T1, 12.1 EC

1 To use a PA-4E 4-port Ethernet 10Base-T port adapter in a Cisco uBR7246VXR router, be sure that you have the minimum required hardware revision (version 1.14, part number 800-02070-04) or a more recent version of the port adapter.

2 To use a PA-8E 8-port Ethernet 10Base-T port adapter in a Cisco uBR7246VXR router, be sure that you have the minimum required hardware revision (version 1.14, part number 800-02069-04) or a more recent version of the port adapter.

3 The Gigabit Ethernet port adapter must be combined with the appropriate optical fiber cable and a Gigabit Interface Converter (GBIC).

4 To use a PA-H 1-port HSSI port adapter in a Cisco uBR7246VXR router, be sure that you have the minimum required hardware revision (version 1.17, part number 800-02747-06) or a more recent version of the port adapter.

5 To use a PA-2H 2-port HSSI port adapter in a Cisco uBR7246VXR router, be sure that you have the minimum required hardware revision (version 1.3, part number 800-03306-02) or a more recent version of the port adapter.

6 CES = circuit emulation service

7 CBR = constant bit rate

8 SRP = Spatial Reuse Protocol


Power Supplies


Caution To ensure adequate airflow across the Cisco uBR7246VXR and Cisco uBR7246 universal broadband routers 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 uBR7200 Series Router Specifications," for AC-input power supply system power specifications, including input voltage and operating frequency ranges.


The power supply contains a main power switch, OK LED, and either an AC-input power receptacle, or two hardwired DC-input power leads and three M5 grounding connectors (depending on the type of installed power supply). Adjacent to the lower power supply bay, two M5 chassis grounding receptacles provide a chassis ground connection for electrostatic discharge (ESD) equipment or a two-hole grounding lug for the AC-input power supplies.

The Cisco uBR7246VXR and Cisco uBR7246 support an optional, second power supply for load sharing and power redundancy. If you purchased a Cisco uBR7246VXR or Cisco uBR7246 and you want to install a second power supply, you must order the second power supply separately.

Detailed instructions for handling and replacing the Cisco uBR7200 series universal broadband router power supplies are contained in the documents:

Cisco uBR7200 Series Universal Broadband Router AC Power Supply Replacement Instructions

Cisco uBR7200 Series Universal Broadband Router 550-Watt DC-Input Power Supply Replacement Instructions.

These documents are available on Cisco.com at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/cable/cab_rout/cfig_nts/index.htm

These documents are also available on the Documentation DVD-ROM.

A handle on the AC-input and DC-input power supply units provides a grip point for removing and replacing the power supply. (Figure 1-9 shows the faceplate of the AC-input power supply. Figure 1-10 shows the faceplate of the DC-input power supply.) Two captive installation screws secure the power supply to the chassis and seat the power supply in the router midplane. A Power OK LED indicates that the power supply is delivering +5 VDC to 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. A cable-retention clip secures the power cable to the AC-input power supply.


Note The AC-input power supply has an electrical current rating of 7A for the Cisco uBR7246 and Cisco uBR7246VXR routers.


Figure 1-9 Cisco uBR7246 and Cisco uBR7246VXR AC-Input Power Supply

The DC-input power supply has a receptacle for two DC-input power leads. Three M5 grounding receptacles are located on the front of the DC-input faceplate to provide connection for a ground lead. A ground lead should be installed on two of the receptacles; using either the two receptacles that are aligned vertically or the two receptacles that are aligned horizontally. A cover is attached to two strain-relief studs on the power supply faceplate to secure the DC-input power leads running behind the cover.


Note Each DC-input power supply has an electrical current rating of 14A, 700 VA. Use a minimum of 12 AWG (4 mm2) wire for the input to each DC-input power supply.



Caution The power input must be protected by a 20A circuit breaker or fuse that is in compliance with your local electric regulations.

Figure 1-10 Cisco uBR7246 and Cisco uBR7246VXR DC-Input Power Supply


Caution To ensure adequate airflow across the Cisco uBR7246VXR and Cisco uBR7246 universal broadband routers 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 uBR7200 Series Router Specifications," for AC-input and DC-input power supply system power specifications, including input voltage and operating frequency ranges.


The Power OK LED goes off and the power supply shuts itself down when the internal DC voltages exceed allowable tolerances or the internal temperature of the power supply exceeds allowable tolerances. The power supply then attempts to restart itself within 10 seconds of the shutdown. If the power supply cannot restart itself on the first attempt, it repeats the automatic restart sequence until the power switch is manually switched to the off position, or the power cord is disconnected from the back of the power supply or the power source. For a description of power supply shutdown conditions and thresholds, refer to the "Environmental Monitoring and Reporting Functions" section on page 5-2.


Caution When the input power to Cisco uBR7200 series universal broadband router 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 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 uBR7246VXR and Cisco uBR7246, shown in Figure 1-11, consists of seven fans that are attached to a metal tray.

In each of the Cisco uBR7200 series routers, the fan 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 and I/O controller 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.

To remove the fan tray from the chassis, loosen the captive installation screw on the front of the fan tray and slide the tray out, using the attached handle.

Detailed instructions for removing and replacing the fan tray are contained in the document Cisco uBR7200 Series Universal Broadband Router Fan Tray Replacement Instructions at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/installation/4939sbc.html

Figure 1-11 Cisco uBR7246VXR and Cisco uBR7246 Fan Tray

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 out the exhaust vent on the left side of the chassis. Figure 1-12 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.)

Figure 1-12 Internal Airflow—Top View

Cisco uBR7246 and Cisco uBR7246VXR Chassis

The front of the chassis has one slot for an I/O controller, two slots for single-width port adapters (or one dual-width port adapter), four slots for cable interface cards, one slot for a fan tray, and one bay for the subchassis and midplane. See Figure 1-13.

Figure 1-13 Cisco uBR7246 and Cisco uBR7246VXR Chassis


Note To replace the Cisco uBR7200 series chassis, you must remove all of its internal components; therefore, when replacing the chassis, refer to the documents that explain how to remove and replace the internal components on Cisco.com.


Subchassis and Midplane

The subchassis and midplane provide these functions for the Cisco uBR7200 series:

Distributes power from the power supply to the I/O controller.

Bridges the peripheral component interconnect (PCI) buses from the port adapters to the packet static random-access memory (SRAM) on the NPE-200 or synchronous dynamic random-access memory (SDRAM) on the NPE-400, Cisco uBR7200-NPE-G1, or the Cisco uBR7200-NPE-G2.

Arbitrates traffic across the PCI buses.

Generates clock signals for the port adapter on the PCI bus.

Cisco uBR7246VXR and Cisco uBR7246 Subchassis

The Cisco uBR7246VXR and Cisco uBR7246 subchassis (the rear of the routers) have two bays for power supplies and one slot for a network processing engine. (See Figure 1-14.)

The cable-interface card side of the Cisco uBR7246VXR and Cisco uBR7246 midplane has four connectors for cable interface cards, two connectors for port adapters, one connector for an I/O controller, and a connector for the fan tray.

The Cisco uBR7246VXR also features one connector for a cable clock card. 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.


Note You should remove the subchassis, NPE, and fan tray if you are replacing the midplane.


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

http://www.cisco.com/univercd/cc/td/doc/product/cable/cab_rout/cfig_nts/5193sbm.pdf

Figure 1-14 Cisco uBR7246VXR and Cisco uBR7246 Subchassis and Midplane

Flash Memory Cards

The Cisco uBR7200 series universal broadband router supports up to two installed Type II PCMCIA flash memory cards provided by Cisco.

Flash memory (flash memory cards and the flash SIMM on the I/O controller) allows you to remotely load and store multiple system and boot helper images. You can download a new image over the network and then add the new image to flash memory or replace existing files. You can also transfer images between flash memory cards and the onboard flash memory SIMM. You can then boot the router either manually or automatically from any of the stored images. Flash memory can also function as a TFTP server to allow other routers to boot remotely from stored images or copy them into their own flash memory.

For flash memory replacement information, see Memory Replacement Instructions for the Network Processing Engine and Input/Output Controller at the following URL:

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

For flash disk information, see Using the Flash Disk at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/core/7200vx/72vxfru/5819fdsk.htm

Table 1-4 lists the flash memory card options supported by the Cisco uBR7200 series routers.

Table 1-4 Flash Memory Card Options

Memory Size, MB
Product Number
Supports

20

MEM-I/O-FLD20M1

All NPEs, except Cisco uBR-7200-NPE-G1

48

MEM-I/O-FLD48M1

NPE-225, NPE-300, NPE-400

128

MEM-I/O-FLD128M1

NPE-225, NPE-300, NPE-400

256 (2—128 MB)

MEM-NPE-G1-256MB

Cisco uBR-7200-NPE-G1

512 (2—256 MB)

MEM-NPE-G1-512MB

Cisco uBR-7200-NPE-G1

1GB (2—512 MB)

MEM-NPE-G1-1GB

Cisco uBR-7200-NPE-G1

64

MEM-NPE-G1-FLD64

Cisco uBR-7200-NPE-G1

128

MEM-NPE-G1-FLD128

Cisco uBR-7200-NPE-G1

256

MEM-NPE-G1-FLD128

Cisco uBR-7200-NPE-G1

1 These products are also available as flash memory card upgrades. To order an upgrade, add an equal sign (=) after the product number, for example, MEM-I/O-FLC16M=.


CompactFlash Disk

The NPE-G2 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 256 MB of storage space.

The CompactFlash Disk has controller circuitry that allows it to emulate a hard disk and automatically maps out bad blocks and performs automatic block erasure. The CompactFlash Disk also provides the capability to allocate noncontiguous sectors, which eliminates the need for the squeeze command (which was required with older-style linear flash memory cards to recover the space used by deleted files).

The CompactFlash Disk also supports the Cisco IOS File System feature, which provides a single interface to all of the router's file systems, including the Flash Disks and flash memory, as well as network file systems such as File Transfer Protocol (FTP) and Trivial FTP (TFTP) servers.


Note All CompactFlash Disks must be formatted before their initial use. CompactFlash Disks shipped with the NPE-G2 are formatted at the factory, but spare memory cards are not formatted.