Cisco XR 12406 User Manual

Cisco XR 12406 Router Installation Guide

March 2009

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Text Part Number: OL-13831-01

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Cisco XR 12406 Router Installation Guide

© 2009 Cisco Systems, Inc. All rights reserved.

CONTENTS

Preface xi

Changes to This Document xi

Obtaining Documentation and Submitting a Service Request xii

Audience xii

Purpose xii

Installation Guide Organization xiii

Document Conventions xiii

CHAPTER

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1 Cisco XR 12406 Router Overview 1-1

Router Description 1-1

Features 1-5

Physical and Functional Description 1-7

Route Processor 1-7
Performance Route Processor Overview 1-9
PRP Memory Components 1-14

Line Cards 1-21

Multigigabit Crossbar Switch Fabric 1-23
Alarm Cards 1-25
Power Subsystems 1-28
Blower Module 1-37
Chassis Backplane and Maintenance Bus 1-39
Air Filters 1-42
Cable-Management System 1-43

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Contents

Field-Replaceable Units 1-46

Upgrading a Cisco 12000 Series Internet Router to a
Cisco XR 12000 Series Router 1-47

Technical Specifications 1-47

CHAPTER

2 Preparing for Installation 2-1

Tools and Equipment 2-2

Safety and Compliance 2-2

General Safety Guidelines 2-3
Compliance and Safety Information 2-4
Preventing Electrostatic Discharge Damage 2-5
Laser Safety 2-7
Lifting Guidelines 2-7

Safety with Electricity 2-8

Installation Site Requirements 2-9

Rack-Mounting Guidelines 2-9
Environmental Guidelines 2-13
Power Connection Guidelines 2-14
Site Wiring 2-20

Unpacking and Repacking the Router 2-21

Transporting a Cisco XR 12000 Series Router 2-22

Site Preparation Checklist 2-22

CHAPTER

6

3 Installing the Cisco XR 12406 Router 3-1

Required Tools 3-2

Installing a Router 3-2

Installing the Rack-Mounting Brackets—Optional 3-3
Installing Center-Mounting Brackets (optional) 3-5
Installing the Chassis in a Rack 3-8

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Installing the Chassis on a Tabletop or Flat Surface 3-10

Supplemental Bonding and Grounding Connections 3-10

Connecting RP and Line Card Cables 3-14

Connecting Alarm Card Cables 3-17

Connecting to the Console and Auxiliary Ports 3-17

PRP Console Port Signals 3-19
PRP Auxiliary Port Signals 3-19

Installing a Flash Memory Card 3-20

Connecting the PRP to an Ethernet Network 3-22

Connecting to an AC Power Source 3-26

Connecting to a DC Power Source 3-29

Powering On the Router—First Time 3-32

External Network Interface 3-35

Manually Booting the System 3-35

Boot Process Overview 3-35
Starting the Router and Observing Initial Conditions 3-36
Manually Booting the System 3-41

Contents

CHAPTER

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4 Troubleshooting the Installation 4-1

Identifying Startup Problems 4-1

Using the System LEDs to Troubleshoot 4-3

Problem-Solving with Subsystems 4-4

Troubleshooting an AC Power Subsystem 4-6

Troubleshooting a DC Power Subsystem 4-9

Troubleshooting the Processor Subsystem 4-13

Troubleshooting the RP 4-13
Troubleshooting the Line Cards 4-24
Troubleshooting the Alarm Cards 4-27

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Contents

Troubleshooting the Cooling Subsystem 4-31

CHAPTER

5 Maintaining the Router 5-1

Tools and Equipment 5-3

Powering Off the Router 5-3

Removing and Installing the Front Cover 5-4

Removing the Front Cover 5-4
Installing the Front Cover 5-4

Removing and Replacing the Air Filters 5-6

Removing and Replacing the Blower Module 5-8

Troubleshooting the Blower Installation 5-12
Installation Guidelines 5-13

Removing and Replacing an AC Power Entry Module 5-13

Troubleshooting the AC Power Entry Module Installation 5-17

Removing and Replacing an AC PDU 5-19

Removing and Replacing a DC PEM 5-26

Troubleshooting the DC Power Supply Installation 5-30

Removing and Replacing a DC PDU 5-31

Troubleshooting the DC PDU Installation 5-40

Removing and Replacing an RP or a Line Card 5-41

Attaching the Cable-Management Bracket and Connecting Cables 5-46

Removing and Installing a Clock and Scheduler Card, Switch Fabric Card, or Alarm
Card 5-50

Removing and Replacing a Clock Scheduler Card 5-50
Removing and Replacing a Switch Fabric Card 5-53
Removing and Replacing an Alarm Card 5-55

Upgrading the RP and Line Card Memory 5-58

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Contents

APPENDIX

APPENDIX

I

NDEX

A Cisco XR 12406 Router Technical Specifications and Warnings A-1

Specifications A-1

Alarm Card Alarm Relay Connector Specifications A-5

Compliance Information A-6

Regulatory, Compliance, and Safety Information A-9

Translated Safety Warnings and Agency Approvals A-9
Electromagnetic Compatibility Regulatory Statements A-9
Compliance Label A-13
Router Performance Upgrades and Model Identification A-14

B Repacking the Router B-1

Transporting and Storing the Router B-1

Shipping Package Overview B-2

Tools and Equipment B-4

Safety Recommendations B-4

Repacking the Router B-4

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Contents

10

Cisco XR 12406 Router Installation Guide

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Preface

Revised: March, 2009, OL-13831-01

The Cisco XR 12406 Router Installation Guide provides information related to
installation and removal of Cisco XR 12406 Router Chassis.

The preface contains the following sections:

• Changes to This Document

• Obtaining Documentation and Submitting a Service Request

• Audience

• Purpose

• Installation Guide Organization

• Document Conventions

Changes to This Document

Table 1 lists the technical changes made to this document since it was first printed.

Ta b l e 1 Changes to This Document

Revision Date Change Summary

OL-13831-01 March 2009 Added Performance Route Processor-3 (PRP-3) hardware

details. PRP-3 has been introduced in Cisco IOS XR Software
Release 3.8.0. PRP-3 will be supported on Cisco IOS XR
Software Release 3.8.0 and later releases.

Cisco XR 12406 Router Installation Guide

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xi

Preface

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
Documentation, which also lists all new and revised Cisco
documentation, at:

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

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

New in Cisco Product

technical

Audience

The audience for the Cisco XR 12406 Router Installation Guide user
documentation are the people who will install and configure a
Cisco

XR 12404 Router. The user typically has a substantial background in
installing and configuring router- and switch-based Internets but may or may not
have experience with Cisco products and supported protocols.

The reader of this documentation should be familiar with electronic circuitry and
wiring practices and have experience as an electronic or electromechanical
technician.

Purpose

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xii

This installation and configuration guide explains the hardware installation and
basic configuration procedures for a Cisco
procedures for installing the hardware, creating a basic configuration file, and
starting up the router.

XR 12404 Router. It contains

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Preface

Installation Guide Organization

The Cisco XR 12406 Router Installation Guide contains the following chapters,
appendix, and index.

• Chapter 1, “Cisco XR 12406 Router Overview”—Presents a high-level

system overview and physical description of the major components of Cisco
XR 12406 Router, including the power and cooling systems, Performance
Route Processor (PRP), clock and scheduler cards (CSC), switch fabric cards
(SFC), and alarm cards, and gives a functional overview.

• Chapter 2, “Preparing for Installation”—Describes safety, site requirements

for power, environmental safety, cabling, rack-mounting, electrostatic
discharge (ESD), unpacking, site log, and site preparation checklist.

• Chapter 3, “Installing the Cisco XR 12406 Router”—Gives the procedures

for the initial installation and setup of Cisco XR 12406 Router.

• Chapter 4, “Troubleshooting the Installation”—Explains how to identify and

solve problems that might occur during installation.

• Chapter 5, “Maintaining the Router”—Explains safety at the

field-replaceable unit (FRU) level, removal and replacement procedures for
field-replaceable units and assemblies, and associated procedures to
troubleshoot and verify FRU and device operation.

• Appendix A, “Cisco XR 12406 Router Technical Specifications and

Warnings”—Provides technical specifications, connector cable

specifications, regulatory statements, and translated safety warnings for the
Cisco XR 12406 Router.

• Appendix B, “Repacking the Router”

• Index—Contains a keyword and subject index of pertinent terms and

information.

Document Conventions

This publication uses the following conventions:

• Ctrl represents the key labeled Control. For example, the key combination

Ctrl-z means hold down the Control key while you press the z

Command descriptions use these conventions:

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key.

Cisco XR 12406 Router Installation Guide

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Preface

• 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 router> indicates that you should be at the user
level, and the prompt

router# indicates that you should be at the privileged

level. Access to the privileged level usually requires a password. Refer to the
related software configuration and reference documentation for additional
information.

• Commands and keywords are in boldface font.

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

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

• Alternative but required keywords are grouped in braces ({ }) and separated

by vertical bars (|).

Examples use these conventions:

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

• Information you enter is in boldface screen font.

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

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

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

Caution Means be careful. You are capable of doing something that might result in

equipment damage or loss of data.

Note Means reader take note. Notes contain helpful suggestions or references to

materials not contained in this manual.

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

action described in the paragraph.

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xiv

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Preface

Warning

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. To see translations of the warnings that appear in this
publication, refer to the Regulatory Compliance and Safety Information
document that accompanied this device.

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Preface

xvi

Cisco XR 12406 Router Installation Guide

OL-13831-01

Cisco XR 12406 Router Overview

This chapter provides an overview of the Cisco XR 12406 Router. It contains
physical descriptions of the router hardware and major components, and
functional descriptions of the hardware-related features.

Router Description

The Cisco XR 12406 Router, shown in Figure 1-1 and Figure 1-3, is a member of
the Cisco XR 12000 Series Router family. The Cisco XR 12406 Router scales the
Internet Service Provider edge from speeds of T3/E3 (44.7/34.4 Mbps) up to
OC-192/STM-64 or 10GE (10 Gbps).

Note Illustrations are shown without the front door for clarity.

CHA P T E R

1

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Cisco XR 12406 Router Installation Guide

1-1

Chapter 1 Cisco XR 12406 Router Overview

Router Description

Figure 1-1 Cisco XR 12406 Router—Front View (with PRP installed)

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2 Route processor slot 6 Power module bays (two)

3 Blower module 7 CSC slots (2)

4 SFC slots (3) 8 Cable management bracket

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Chapter 1 Cisco XR 12406 Router Overview

Router Description

Figure 1-2 Cisco XR 12406 Router—Front View (with PRP-3 installed)

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Router Description

Figure 1-3 Cisco XR 12406 Router—Rear View

1

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HIGH SPEED BLOW

ER

Chapter 1 Cisco XR 12406 Router Overview

2 5

1 Blower module 4 Air exhaust vents

2 Blower module LEDs 5 PDU (behind Blower module; AC

PDU shown)

3 Blower module handle —

With a chassis height of 18.5 inches (46.9 cm), four Cisco XR 12406 Routers can
be installed in a single standard 7-foot (2.15-m) equipment rack.

Cisco XR 12406 Router supports system software downloads for most Cisco XR
IOS software upgrades, which enables you to remotely download, store, and boot
from a new Cisco XR IOS image.

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Chapter 1 Cisco XR 12406 Router Overview

Features

Cisco XR 12406 Router has the following key features:

• Route Processor (PRP-2)—Slot 5 (bottom slot) is the recommended slot for

the first route processor. When the router is equipped with a redundant route
processor, it can be installed in any of the five regular line card slots.

• Line Cards—Up to five OC-192 line cards, four if redundant route processors

are installed. These slots support the online insertion and removal (OIR)
feature so installed cards are hot-swappable: A failed card can be removed
and replaced with the router powered on.

• Clock and Scheduler Cards (CSCs) and Switch Fabric Cards (SFCs)—Two

dedicated hot-swappable slots for CSCs; three dedicated hot-swappable slots
for SFCs.

Note When operating your router with a single CSC, the second CSC slot must

have a CSC blank filler (MAS-GSR6-CSCBLNK=) installed to ensure
EMI compliance.

Features

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• Two dedicated alarm card slots (for 1+1 redundancy)

• Alarm and Illumination—Alarm and illumination for operating ranges in the

card cage, clock and scheduler card, and switch fabric card bays.

• Two hot-swappable AC-input power supplies or DC-input power entry

modules (PEMs).

Note When operating your router on a single AC-input power supply or

DC-input PEM, the second power module bay must have a blank filler
(MAS-GSR-PWRBLANK=) installed to ensure EMI compliance.

• All power modules and other field replaceable units (FRUs), except for the

air blower module and the power distribution unit (PDU), can be removed
from the front of the chassis.

• All source power connections are located at the rear of the chassis on the PDU

(see

Figure 1-3).

• A new stylish front door hides router cabling and can be installed to open

from the right side or left side to give you total flexibility.

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Features

Chapter 1 Cisco XR 12406 Router Overview

• Network Equipment Building Systems—Cisco XR 12406 Router complies

with the Network Equipment Building System (NEBS) Criteria Level 3
requirements defined in SR-3580 for flammability, structural, and electronics
compliance.

• Electromagnetic Compatibility and Electrostatic Discharge Compliant— The

Cisco

XR 12406 Router complies with emissions, immunity, and

electrostatic discharge (ESD) standards for both product and packaging.

• Bonding and Grounding—Bonding and grounding for safety, circuit

protection, noise currents, reliability, and operations compliance.

• Environmental Monitoring—the Cisco XR 12406 Router complies with

environmental monitoring standards for operating temperature and humidity,
as well as handling temperature and humidity (except for heat dissipation).

• Shock and Vibration—the Cisco XR 12406 Router has been shock- and

vibration-tested for operating ranges, handling, and earthquake standards to
NEBS (Zone 4 per GR-63-Core). These tests have been conducted in
earthquake environment and criteria, office vibration and criteria,
transportation vibration and criteria, and packaged equipment shock criteria.

• Fiber Cable Management—Fiber cable management with support for

high-density fiber Fast Ethernet (FE) ports.

1-6

• Current 1.275-inch pitch line cards will fit in the line card cage with the

addition of a front panel adapter cover. The line card adapter cover is included
with the 1.275-inch line card.

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Chapter 1 Cisco XR 12406 Router Overview

Physical and Functional Description

The following are the main components that make up the Cisco XR 12406 Router:

• One route processor with a second (redundant) route processor option

• Up to 5 line cards (4 if there are redundant route processors)

• 2 clock scheduler cards (CSCs)

• 3 switch fabric cards (SFCs)

• 2 alarm cards

• 2 power modules

• Backplane and maintenance bus

• Blower module

• 2 air filters

These components and their functions are described in this section. See Chapter 5,

“Maintaining the Router” for instructions to remove and replace the FRUs.

Physical and Functional Description

Route Processor

The route processor for the Cisco XR 12406 Router is the Performance Route
Processor (PRP-2). For detailed information about the Performance Route
Processor, refer to the Cisco document, Performance Route Processor Installation
and Configuration Guide.

The PRP-2 and PRP-3 performs the following primary functions:

• Executes routing protocol stacks

• Performs all protocol communications with other routers

• Builds and distributes forwarding information to all line cards

• Uploads the operating system software images to all installed line cards

• Provides out-of-band system console and auxiliary ports and an Ethernet port

• Monitors and manages the power and temperature of system components

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during power-up

for router configuration and maintenance

such as line cards, power supplies, and fans

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Physical and Functional Description

The Cisco PRP-2 and PRP-3 delivers all these functions with enhanced
performance and capabilities. It also delivers the following feature enhancements
(depending on the software version running):

• Gigabit Ethernet management port

• Hard-drive support (optional part)

• BITS input ports

• 1 GB compact image Flash memory support (optional part)

• Memory scalability up to 4 GB with PRP-2 and up to 8 GB with PRP-3.

The PRP-2 and PRP-3 communicates with the line cards either through the switch
fabric or through the MBus. The switch fabric connection is the main data path
for routing table distribution as well as for packets that are sent between the line
cards and the PRP. The MBus connection allows the PRP-2 and PRP-3 to
download a system bootstrap image, collect or load diagnostic information, and
perform general, internal system maintenance operations.

The PRP-2 can be designated as either the Designated System Controller (DSC)
or the Secure Domain router (SDR).

The Designated System Controller (DSC) performs the following functions:

Chapter 1 Cisco XR 12406 Router Overview

1-8

• Implements control plane operations for the chassis

• Monitors temperature and voltage

• Monitors line cards

• On boot up, the first card to become active is designated as the DSC.

The Secure Domain Router (SDR) controls domain security features independent
of any other SDRs on the network.

In addition to the functionality listed for the PRP-2, PRP-3 provides the following
specific functions:

• Reduced boot time.

• Increased overall scalability.

• Improved memory access rates and scale.

• Improved CPU performance through dual 1.3-GHz PPC processor cores.

• Improved packet processing using hardware-based acceleration.

• 10-G bandwidth backplane connectivity.

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Chapter 1 Cisco XR 12406 Router Overview

Physical and Functional Description

• Support for all 124xx and 128xx chassis, except low speed fabric (2.5G).

• New ROMMON that supports IPv4 network configuration directly.

Performance Route Processor Overview

The performance route processor (PRP-2) uses a Motorola PowerPC 7457 CPU
that runs at an external bus clock speed of 133 MHz and has an internal clock
speed of 1.3 GHz.

Figure 1-4 identifies the slots, ports, and LEDs on the PRP front panel.

Figure 1-4 Performance Route Processor-2 (PRP-2) Front Panel

ACT

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SLOT-0

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Ta b l e 1-1 Performance Route Processor-2 (PRP-2) Front Panel Hardware Components

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PERFORMANCE ROUTE PROCESSOR 2

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1 PCMCIA flash disk slots (shown with cover in

4 Console serial port

place) and slot LEDs

2 RJ-45 Ethernet ports and data status LEDs 5 Reset button

3 Auxiliary serial port 6 Alphanumeric messages

Figure 1-5 Performance Route Processor 3 (PRP-3) Front Panel

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Physical and Functional Description

Ta b l e 1-2 PRP3 Front Panel Hardware Components Detail

Numeric Callout Hardware Components

1 Ejecter Lever

2 Handle

3 External Compact Flash

4 Reset button

5 Alphanumeric LEDs

PRP-3 is the route processor for the Cisco XR 12404 and 12804 Router chassis
running Cisco IOS XR Software Release 3.8.0 or a later release. The PRP-3 is
available as product number PRP-3 or PRP-3= for a primary route processor and
is available as PRP-3/R for a redundant route processor. PRP-3 has significant
improvements over PRP-2. These improvements include increased speed,
improved scalability, higher system memory, faster packet processing. Because
PRP-3 does not support Cisco IOS, the bootflash memory no longer exists in
PRP-3. PRP-3 ROMMON has software intelligence to download a Cisco IOS XR
image without the support of bootflash memory.

Chapter 1 Cisco XR 12406 Router Overview

Note PRP-3 supports Cisco XR 12404 (10 G per slot fabric) and Cisco XR 12804 (40

G per slot fabric) Router chassis only. PRP-3 does not support Cisco XR 12004,
12006, 12010, and 12016 Router chassis (2.5 G low-speed fabric).

PRP PCMCIA Card Slots and Status LEDs

Two PCMCIA card slots (slot 0 and slot 1) provide the PRP with additional flash
memory capacity. All combinations of different flash devices are supported by the
PRP. You can use ATA flash disks, Type 1 or Type 2 linear flash memory cards,
or a combination of the two.

Note The PRP only supports +5.2 VDC flash memory devices. It does not support

+3.3 VDC PCMCIA devices.

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Status LEDs (Slot-0 / Slot-1) indicate when the flash memory card in that slot is
accessed (see

Figure 1-4). Each slot has an eject button (located behind the cover)

to remove a flash card from the slot.

Note PRP-3 does not have PCMCIA slots (slot 0 and slot 1). PRP-3 has an external

CompactFlash (disk0:) that replaces the PCMCIA slots.

PRP Ethernet Ports and Status LEDs

The PRP has two 8-pin media-dependent interface (MDI) RJ-45 ports for either
IEEE 802.3 10BASE-T (10
Ethernet connections. These ports are labeled ETH 0 and ETH 1.

The transmission speed of the Ethernet port is not user-configurable. You set the
speed through an autosensing scheme on the PRP which is determined by the
network that the Ethernet port is connected to. However, even at an autosensed
data transmission rate of 100 Mbps, the Ethernet port can only provide a usable
bandwidth of substantially less than 100 Mbps. You can expect a maximum usable
bandwidth of approximately 20 Mbps when using an Ethernet connection.

Physical and Functional Description

Mbps) or IEEE 802.3u 100BASE-TX (100 Mbps)

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The following LEDs on the front panel indicate traffic status and port selection
(

Figure 1-6):

• LINK, EN, TX, RX—Indicate link activity (LINK), port enabled (EN), data

transmission (TX), and data reception (RX).

• PRIMARY—Indicates which Ethernet port is selected (ETH 0 or ETH 1).

Note Because both ports are supported on the PRP, ETH 0 is always on. ETH 1

lights when it is selected.

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Physical and Functional Description

Figure 1-6 PRP-2 Port Activity LEDs—Partial Front Panel

Chapter 1 Cisco XR 12406 Router Overview

ETH 1ETH 0

SLOT-1

SLOT-0

PRIMARY

Figure 1-7 PRP-3 Port Activity LEDs—Partial Front Panel

DATA

LINK

ETH 1ETH 0

PRP Auxiliary and Console Ports

The auxiliary and console ports on the PRP are EIA/TIA-232 (also known as
RS-232) asynchronous serial ports. These ports connect external devices to
monitor and manage the system.

• The auxiliary port—A (male) plug that provides a data terminal equipment

(DTE) interface. The auxiliary port supports flow control and is often used to
connect a modem, a channel service unit (CSU), or other optional equipment
for Telnet management.

• The console port—A (female) receptacle that provides a data

circuit-terminating equipment (DCE) interface for connecting a console
terminal.

LINK

EN

LINK

DATA

RX

TX

SIG

BITS 0

RX

TX

70693

PRIMARY

SIG

ACT

EN

LINK

ACT

BITS 1 AUX CONSOLE

272388

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PRP-3 LEDs

The PRP-3 has the following LED indicators:

• Two Ethernet port LEDs used in conjunction with each of the three RJ-45

Ethernet connectors:

–

–

• Two BITS port LEDs used in conjunction with each of the two BITS ports:

–

–

Note BITS feature is not supported in Release 3.8.0.

• One auxiliary port (AUX) and one console port (CONSOLE) LED:

–

–

Physical and Functional Description

LINK—Indicates link activity

DATA—Indicates data transmission or reception

SIG—Indicates carrier signal available

ACT—Indicates that the interface is active

AUX—Used as a backup for the command outputs on the Console.

CONSOLE—Used for configuring the router by connecting an RJ-45
cable to the console terminal. The router can be configured through the
console terminal.

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Physical and Functional Description

PRP Memory Components

This section describes various types of memory used on the PRP to support router
functions.
and Figure 1-8 shows the location on the PRP board.

Ta b l e 1-3 PRP-2 Memory Components

Ty pe Size Quantity Description Location

SDRAM

1

2 GB (default)
or 4 GB
(optional)

3

SRAM

NVRAM

2 MB (fixed) — Secondary CPU cache memory functions —

4

2 MB (fixed) 1 System configuration files, register settings,

HDD 40 GB 1 Contains log and crash information for

Flash
memory

2 GB or 4 GB
(optional)
Compact
Flash

4 MB Boot
ROM

Flash disks5 2
GB (default)
or 4 GB
(optional)

1 GB CF

1. Default SDRAM configuration is 2-GB for PRP-2. Bank 1 (U15) must be populated first. You can use one or both banks to
configure SDRAM combinations of 2 GB and 4 GB for the PRP-2. 1.5-GB configurations.and DIMM devices that are not
from Cisco are not supported.

2. If both banks of the PRP-2 are populated, bank 1 and bank 2 must contain the same size DIMM.

3. SRAM is not user configurable or field replaceable.

4. NVRAM is not user configurable or field replaceable.

5. ATA Flash disks are supported in the PRP-2.

6. Optional PRP-2 hardware. Compact disks that are not from Cisco are not supported.

6

Table 1-3 provides a quick reference of the different types of memory,

1 or 2 2-GB or 4-GB DIMMs (based on desired

SDRAM configuration) for main Cisco IOS

U15 (bank 1)
U18 (bank 2)

XR software functions

—

and logs

—

specific Cisco IOS XR versions.

1 Contains Cisco IOS XR boot image

P3
(bootflash), crash information, and other
user-defined files

1 Stores the ROMMON minimum boot image

(MBI).

1 or 2 Contains Cisco IOS XR software images,

system configuration files, and other
user-defined files on up to two flash disks

1 Contains large Cisco IOS XR software

Flash disk

slot 0 and

slot 1

—
images

2

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