Cisco CRS-1 - Carrier Routing System Router User manual

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Cisco CRS-1 Series Carrier Routing System
Getting Started Guide
Cisco IOS XR Software Release 3.0
Text Part Number: OL-6142-02

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
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CONTENTS
Preface xi
Introduction xi
About This Document xi
Intended Audience xii
Organization of the Document xii
Related Documents xii
Conventions xiii
Obtaining Documentation xiii
Cisco.com xiii
Ordering Documentation xiv
Documentation Feedback xiv
Obtaining Technical Assistance xiv
Cisco Technical Support Website xiv
Submitting a Service Request xv
Definitions of Service Request Severity xv
Obtaining Additional Publications and Information xvi
CHAPTER 1Getting Started on the Cisco CRS-1 Router 1-1
Contents 1-1
Basic System Configurations 1-1
Logical Routers 1-3
Hardware Overview: Single-Chassis System 1-3
Card Slots in a Cisco CRS-1 16-Slot Line Card Chassis 1-3
Card Slots in a Cisco CRS-1 8-Slot Line Card Chassis 1-5
Line Cards and Physical Layer Interface Modules 1-6
Switch Fabric Modules 1-6
Route Processors 1-7
Additional Hardware Documentation 1-9
User Interfaces 1-9
Command-Line Interface 1-9
Craft Works Interface 1-9
Extensible Markup Language API 1-10
Simple Network Management Protocol 1-11

Contents
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
File Storage 1-11
Sandisk Flash Disks 1-12
Hard Disk 1-13
CHAPTER 2Cisco IOS XR Basic Configuration Management 2-1
Contents 2-1
Connecting and Communicating with the Router 2-1
Logging In to the Router 2-4
CLI Prompt 2-4
User Access Privileges 2-5
User Groups 2-6
Predefined User Groups 2-6
Task IDs 2-6
Displaying the User Groups and Task IDs for Your User Account 2-7
Navigating the Cisco IOS XR Command Modes 2-8
Identifying the Command Mode in the CLI Prompt 2-9
Summary of Common Command Modes 2-10
Entering EXEC Commands from a Configuration Mode 2-12
Command Mode Navigation Example 2-13
Managing Configuration Sessions 2-14
Stage 1: Enter Configuration Changes to the Nonactive Target Configuration 2-15
Stage 2: Commit Changes to the Running Configuration 2-15
Displaying Configuration Details with show Commands 2-16
Commit Options 2-18
Displaying Configuration Errors 2-19
Clearing All Changes to a Target Configuration 2-20
Ending a Configuration Session 2-21
Locking and Unlocking the Running Configuration During Configuration Sessions 2-22
Configuration History and Rollback 2-23
Displaying the Rollback Points 2-24
Displaying Configuration Changes for Rollback Points 2-24
Rolling Back the Configuration to a Specific Rollback Point 2-25
Rolling Back the Configuration to a Specified Number of Commits 2-25
Displaying the Configuration History Log 2-26
Configuration Change Notification 2-26
Saving and Loading Target Configuration Files 2-27
Saving the Target Configuration to a File 2-28
Loading the Target Configuration from a File 2-28
Loading an Alternative Configuration at System Startup 2-28

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Configuration File Storage 2-29
Impact of Software Package Activation and Deactivation 2-29
Addition or Removal of CLI Commands During Package Activation or Deactivation 2-29
Impact of Package Activation or Deactivation on the Running Configuration 2-29
Impact of Package Activation or Deactivation on the Configuration Rollback 2-30
CHAPTER 3CLI Tips, Techniques, and Shortcuts 3-1
Contents 3-1
CLI Tips and Shortcuts 3-1
Entering Abbreviated Commands 3-2
Using the Question Mark (?) to Display On-Screen Command Help 3-2
Completing a Partial Command with the Tab Key 3-4
Identifying Command Syntax Errors 3-4
Using the no and default Forms of a Command 3-4
Editing Command Lines that Wrap 3-5
Displaying System Information with show Commands 3-6
Common show Commands 3-6
Browsing Display Output when the --More-- Prompt Appears 3-7
Halting the Display of Screen Output 3-7
Redirecting Output to a File 3-8
Narrowing Output from Large Configurations 3-8
Filtering show Command Output 3-9
Wildcards, Templates, and Aliases 3-11
Using Wildcards to Identify Interfaces in show Commands 3-11
Creating Configuration Templates 3-13
Applying Configuration Templates 3-15
Aliases 3-17
Keystrokes Used as Command Aliases 3-18
Command History 3-18
Recalling Previously Entered Commands 3-19
Recalling Deleted Entries 3-19
Redisplaying the Command Line 3-20
Key Combinations 3-20
Key Combinations to Move the Cursor 3-20
Keystrokes to Control Capitalization 3-20
Keystrokes to Delete CLI Entries 3-21
Transposing Mistyped Characters 3-21

Contents
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
CHAPTER 4Bringing up a New Cisco CRS-1 Router 4-1
Contents 4-1
Hardware Prerequisites and Documentation 4-1
Hardware Component and Architecture Overview 4-1
Site Planning, Equipment Unpacking, and Router Installation 4-2
Bringing Up a Single-Chassis System for the First Time 4-2
Powering On a Single-Chassis System for the First Time 4-3
Entering the Initial Configuration Using the Setup Mode Prompts 4-5
Verifying the System After Initial Bring Up 4-9
Examples of show Commands 4-9
CHAPTER 5Initial Configuration of the Cisco IOS XR Software 5-1
Contents 5-1
Configuring the Router Hostname 5-1
Configuring the Management Ethernet Interface 5-2
Specifying the Management Ethernet Interface in CLI Commands 5-2
Displaying the Available Management Ethernet Instance 5-3
Configuring the Management Ethernet Interface 5-4
Configuring the Domain Name and Domain Name Server 5-6
Configuring Telnet, HTTP, and XML Host Services 5-7
Prerequisites 5-8
Installing the Optional Craft Works Interface 5-8
Manually Setting the Router Clock 5-9
Configuring Logging and Logging Correlation 5-11
Logging Locations and Severity Levels 5-11
Alarm Logging Correlation 5-12
Configuring Basic Message Logging 5-12
Creating and Modifying User Accounts and User Groups 5-14
Displaying Details About User Accounts, User Groups, and Task IDs 5-15
Configuring User Accounts 5-15
Predefined User Groups 5-16
Creating Users and Assigning Groups 5-17

Contents
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Configuration Limiting 5-18
Static Route Configuration Limits 5-19
IS-IS Configuration Limits 5-20
OSPFv2 and v3 Configuration Limits 5-20
BGP Configuration Limits 5-23
Routing Policy Language Line and Policy Limits 5-24
Multicast Configuration Limits 5-25
MPLS Configuration Limits 5-26
Other Configuration Limits 5-26
CHAPTER 6Managing Cisco IOS XR Software Packages 6-1
Contents 6-1
Overview of Software Packages 6-1
Software Packages 6-1
Available Packages 6-2
Package Installation Envelope Files 6-10
Standard PIE Filenames and Version Numbers 6-11
Software Maintenance Update PIE Filenames and Version Numbers 6-12
Selecting and Obtaining Software Packages 6-15
Obtaining Cisco IOS XR Software and Version Information from Cisco 6-15
Where to Obtain Installable PIE Files 6-15
Information About Package Management 6-17
Overview of Package Management 6-17
Upgrading Packages 6-18
Downgrading Packages 6-19
Impact of Package Version Changes 6-19
Impact of Package Activation and Deactivation 6-19
Activation and Deactivation Prerequisites 6-20
Package Management Procedures 6-20
Displaying the Active Packages for All Cards 6-21
Displaying the Active Packages for a Single Card 6-22
Copying, Adding, and Activating Packages 6-22
Rolling Back to Committed Software 6-27
Committing the Active Software Change 6-28
Displaying the Committed Package Versions for Each Card 6-28
Removing Inactive Packages from the Router 6-29

Contents
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Configuration Examples for Managing Packages 6-30
Copying and Adding a Package to the Router: Example 6-30
Activating and Testing a Package on the Router: Example 6-31
Activating a Package on the Router: Example 6-33
CHAPTER 7RP Redundancy and Hardware Administration on Cisco IOS XR Software 7-1
Contents 7-1
Commands to Display Hardware Status 7-1
Examples of Hardware Show Commands 7-2
Command Syntax for Hardware Nodes (location nodeID) 7-4
Configure Routing Interfaces 7-7
Physical Components of Routing Interfaces 7-7
Configuring Interfaces in the Cisco IOS XR Software 7-11
RP Redundancy and Failover 7-19
Determining the Primary RP 7-19
Role of the Standby RP 7-20
Summary of Redundancy Commands 7-20
Automatic Failover 7-20
RP Redundancy During RP Reset 7-20
Manual Failover 7-21
Communicating with a Standby RP 7-22
Reloading, Shutting Down, or Power Cycling a Node 7-22
Reloading the Primary RP 7-23
Administratively Shutting Down or Powering On or Off a Node 7-24
Using Controller Commands to Manage Hardware Components 7-24
Formatting Hard Drives, Flash Drives, and Other Storage Devices 7-25
CHAPTER 8Online Insertion and Removal for Switch Fabric Cards 8-1
Contents 8-1
Information About OIR 8-1
Performing an OIR 8-1

Contents
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
CHAPTER 9Troubleshooting the Cisco IOS XR Software 9-1
Contents 9-1
Additional Sources for Information 9-1
Basic Troubleshooting Commands 9-2
Using show Commands to Display System Status and Configuration 9-2
Using the ping Command 9-3
Using the traceroute Command 9-3
Using debug Commands 9-4
Understanding Processes and Threads 9-6
Commands Used to Display Process and Thread Details 9-7
Commands Used to Manage Process and Threads 9-12
Configuration Error Messages 9-13
Configuration Failures During a Commit Operation 9-13
Configuration Errors at Startup 9-14
Memory Warnings in Configuration Sessions 9-14
Understanding Low-Memory Warnings in Configuration Sessions 9-15
Displaying System Memory Information 9-16
Removing Configurations to Resolve Low-Memory Warnings 9-17
Contacting TAC for Additional Assistance 9-20
Interfaces Not Coming Up 9-20
Verifying the System Interfaces 9-21
APPENDIX AROM Monitor Guide A-1
Contents A-1
Entering ROM Monitor Mode A-1
Resetting the Configuration Register and Reloading the Router A-2
Manually Halting the Initialization Process During System Reload A-5
Setting Configuration Register Values A-6
Commonly Used Configuration Register Value Settings A-6
Changing the Configuration Register Setting from EXEC Mode A-6
Changing the Configuration Register from ROM Monitor Mode A-8
Reinstalling the Cisco IOS XR Software from ROMMON A-9
Contents A-10
ROMMON Software Installation Overview A-10
Locating Installable Files A-12
.vm Filenames and Version Numbers A-13
tar Filenames and Version Numbers A-14
Reinstalling the Software from an Image Located on a TFTP Server A-16

Contents
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Reinstalling the Software from a .vm File Located on Flash disk1: A-20
What to Do Next A-24
Specifying an Alternative Configuration A-24
Specifying a Temporary Configuration File with the -a Boot Option A-25
Specifying a Permanent Configuration File with the IOX_CONFIG_FILE= Variable A-25
Disaster Recovery A-25
Recovering the Root Password A-26
Displaying the Available ROM Monitor Commands and Options A-26
Exiting ROM Monitor Mode A-27
Resetting to EXEC Mode with CLI Commands A-28
Resetting to EXEC Mode Using Prompts A-28
APPENDIX BUpgrading and Downgrading ROM Monitor Software B-1
Contents B-1
Information About ROM Monitor Software B-1
ROM Monitor Upgrade and Downgrade Basics B-1
How to Upgrade or Downgrade ROM Monitor B-3
Upgrading or Downgrading ROM Monitor B-3
Configuration Examples for ROM Monitor Upgrades B-6
ROM Monitor Upgrade: Example B-7
Additional References B-12
Related Documents B-12
Technical Assistance B-12
APPENDIX CUnderstanding Regular Expressions, Special Characters, and Patterns C-1
Regular Expressions C-1
Special Characters C-2
Character Pattern Ranges C-2
Multiple-Character Patterns C-3
Complex Regular Expressions Using Multipliers C-3
Pattern Alternation C-4
Anchor Characters C-4
Underscore Wildcard C-4
Parentheses Used for Pattern Recall C-4
G LOSSARY
I NDEX

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Preface
This preface explains the objectives, intended audience, and organization of the Cisco CRS-1 Series
Carrier Routing System Getting Started Guide, and provides information on obtaining additional
information on the Cisco CRS-1 Series Carrier Routing System.
Introduction
This document provides an overview of the concepts, technologies, and procedures used to install,
configure, and operate a Cisco CRS-1 Series Carrier Routing System router (Cisco CRS-1 Series router).
A Cisco CRS-1 router can consist of an extensive hierarchy of racks, logical routers, shelves, cards, and
ports. The Cisco CRS-1 router is shipped with one default logical router (LR). An LR is a collection of
line cards, Route Processors, and other assignable or configurable resources, such as interfaces specific
to your network that together form a complete router within the Cisco CRS-1 router system. An LR
contains its own control plane, data plane, and management plane. The Cisco IOS XR command-line
interface (CLI), an enhanced Cisco IOS-like CLI, is the new CLI interface to configure and manage the
Cisco CRS-1 router.
Note Although the Cisco CRS-1 router is designed to operate as a multiple chassis system that allows for the
configuration of multiple LRs and all their interfaces and resources, Cisco IOS XR Software Releases 2
and 3 support one chassis and one LR. In a single-chassis system, only one LR is necessary or operable.
This chapter contains the following sections:
•About This Document, page xi
•Obtaining Documentation, page xiii
•Documentation Feedback, page xiv
•Obtaining Technical Assistance, page xiv
•Obtaining Additional Publications and Information, page xvi
About This Document
Cisco CRS-1 Series Carrier Routing System Getting Started Guide provides detailed descriptions of the
hardware and software features of the router, including initial system bring up, configuration
management, software installation, and feature configuration.

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Preface
About This Document
Intended Audience
This document is intended for the following people:
•Experienced service provider administrators
•Cisco telecommunications management engineers
•Third-party field service technicians that have completed the Cisco CRS-1 router training sessions
•Customers who daily use and manage the Cisco CRS-1 router
Organization of the Document
This document contains the following chapters:
•Chapter 1, “Getting Started on the Cisco CRS-1 Router”
•Chapter 2, “Cisco IOS XR Basic Configuration Management”
•Chapter 3, “CLI Tips, Techniques, and Shortcuts”
•Chapter 4, “Bringing up a New Cisco CRS-1 Router”
•Chapter 5, “Initial Configuration of the Cisco IOS XR Software”
•Chapter 6, “Managing Cisco IOS XR Software Packages”
•Chapter 7, “RP Redundancy and Hardware Administration on Cisco IOS XR Software”
•Chapter 8, “Online Insertion and Removal for Switch Fabric Cards”
•Chapter 9, “Troubleshooting the Cisco IOS XR Software”
•Appendix A, “ROM Monitor Guide”
•Appendix B, “Upgrading and Downgrading ROM Monitor Software”
•Appendix C, “Understanding Regular Expressions, Special Characters, and Patterns”
Related Documents
For a complete listing of available documentation for the Cisco CRS-1 Series Carrier Routing System,
refer to the following:
•Cisco CRS-1 Series Carrier Routing System Documentation Guide, available online at
http://www.cisco.com.
•About Cisco IOS XR Software Documentation for Release 3.0, available online at
http://www.cisco.com.

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Preface
Obtaining Documentation
Conventions
This document uses the following conventions:
Note Means reader take note. Notes contain helpful suggestions or references to material not covered in the
publication.
Tip Means the following information will help you solve a problem. The information in tips might not be
troubleshooting or an action, but contains useful information.
Caution Means reader be careful. In this situation, you might do something that could result in equipment
damage or loss of data.
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several
ways to obtain technical assistance and other technical resources. These sections explain how to obtain
technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
http://www.cisco.com
You can access international Cisco websites at this URL:
http://www.cisco.com/public/countries_languages.shtml
Item Convention
Commands and keywords boldface font
Variable for which you supply values italic font
Displayed session and system information screen font
Commands and keywords you enter in an
interactive environment
boldface screen font
Variables you enter in an interactive environment italic screen font
Menu items and button names boldface font
Menu navigation Option > Network Preferences

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Preface
Documentation Feedback
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from
the Ordering tool:
http://www.cisco.com/en/US/partner/ordering/index.shtml
•Nonregistered Cisco.com users can order documentation through a local account representative by
calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in
North America, by calling 800 553-NETS (6387).
Documentation Feedback
You can send comments about technical documentation to b[email protected].
You can submit comments by using the response card (if present) behind the front cover of your
document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
Obtaining Technical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco
Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical
Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical
Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service
contract, contact your reseller.
Cisco Technical Support Website
The Cisco Technical Support Website provides online documents and tools for troubleshooting and
resolving technical issues with Cisco products and technologies. The website is available 24 hours a day,
365 days a year at this URL:
http://www.cisco.com/techsupport
Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password.
If you have a valid service contract but do not have a user ID or password, you can register at this URL:
http://tools.cisco.com/RPF/register/register.do

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Preface
Obtaining Technical Assistance
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3
and S4 service requests are those in which your network is minimally impaired or for which you require
product information.) After you describe your situation, the TAC Service Request Tool automatically
provides recommended solutions. If your issue is not resolved using the recommended resources, your
service request will be assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at
this URL:
http://www.cisco.com/techsupport/servicerequest
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone.
(S1 or S2 service requests are those in which your production network is down or severely degraded.)
Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business
operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: [phone] (Australia: 1 800 805 227)
EMEA: [phone]
USA: 1 800 553 2447
For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity
definitions.
Severity 1 (S1)—Your network is “down,” or there is a critical impact to your business operations. You
and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your
business operation are negatively affected by inadequate performance of Cisco products. You and Cisco
will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business operations
remain functional. You and Cisco will commit resources during normal business hours to restore service
to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or
configuration. There is little or no effect on your business operations.

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Preface
Obtaining Additional Publications and Information
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online
and printed sources.
•Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Visit
Cisco Marketplace, the company store, at this URL:
http://www.cisco.com/go/marketplace/
•The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as
ordering and customer support services. Access the Cisco Product Catalog at this URL:
http://cisco.com/univercd/cc/td/doc/pcat/
•Cisco Press publishes a wide range of general networking, training and certification titles. Both new
and experienced users will benefit from these publications. For current Cisco Press titles and other
information, go to Cisco Press at this URL:
http://www.ciscopress.com
•Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and
networking investments. Each quarter, Packet delivers coverage of the latest industry trends,
technology breakthroughs, and Cisco products and solutions, as well as network deployment and
troubleshooting tips, configuration examples, customer case studies, certification and training
information, and links to scores of in-depth online resources. You can access Packet magazine at this
URL:
http://www.cisco.com/packet
•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies
learn how they can use technology to increase revenue, streamline their business, and expand
services. The publication identifies the challenges facing these companies and the technologies to
help solve them, using real-world case studies and business strategies to help readers make sound
technology investment decisions. You can access iQ Magazine at this URL:
http://www.cisco.com/go/iqmagazine
•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering
professionals involved in designing, developing, and operating public and private internets and
intranets. You can access the Internet Protocol Journal at this URL:
http://www.cisco.com/ipj
•World-class networking training is available from Cisco. You can view current offerings at
this URL:
http://www.cisco.com/en/US/learning/index.html

CHAPTER
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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
1
Getting Started on the Cisco CRS-1 Router
This chapter provides a basic discussion of the components, capabilities, software, and hardware of the
Cisco CRS-1 router.
Contents
This chapter contains the following sections:
•Basic System Configurations, page 1-1
•Logical Routers, page 1-3
•Hardware Overview: Single-Chassis System, page 1-3
•User Interfaces, page 1-9
•File Storage, page 1-11
Basic System Configurations
Three basic configurations of the Cisco CRS-1 router system exist:
•The Cisco CRS-1 16-Slot Line Card Chassis, which is a single-chassis system that supports up to
16 modular services cards (MSCs, which are also called line cards) and provides up to 1.28 terabits
per second (Tbps) of routing total I/O capacity.
•The Cisco CRS-1 8-Slot Line Card Chassis, which is a single-chassis system that supports up to 8
MSCs and provides up to 640 gigabits per second (Gbps) of routing total I/O capacity.
•The multiple-chassis system, which comprises multiple line-card chassis interconnected by one or
more fabric chassis.
Figure 1-1 illustrates the difference between single- and multiple-chassis systems.
Note Cisco IOS XR software Releases 2 and 3 support single-chassis systems only.

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Chapter 1 Getting Started on the Cisco CRS-1 Router
Basic System Configurations
Figure 1-1 Basic Cisco CRS-1 Routing Systems
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PL9
PLIM
PL
10
PLIM
PL
11
PLIM
PL
12
PLIM
PL
13
PLIM
PL
14
PLIM
PL
15
Line cardLine card
PLIM
PL0
PLIM
PL1
PLIM
PL2
PLIM
PL3
PLIM
PL4
PLIM
PL5
PLIM
PL6
PLIM
PL7
FC0 FC1
Line card chassis
RP0 RP1
PLIM
PL8
PLIM
PL9
PLIM
PL
10
PLIM
PL
11
PLIM
PL
12
PLIM
PL
13
PLIM
PL
14
PLIM
PL
15
Line cardLine card
PLIM
PL0
PLIM
PL1
PLIM
PL2
PLIM
PL3
PLIM
PL4
PLIM
PL5
PLIM
PL6
PLIM
PL7
FC0 FC1
Line card chassis
RP0 RP1
PLIM
PL8
PLIM
PL9
PLIM
PL
10
PLIM
PL
11
PLIM
PL
12
PLIM
PL
13
PLIM
PL
14
PLIM
PL
15
Line cardLine card
PLIM
PL0
PLIM
PL1
PLIM
PL2
PLIM
PL3
PLIM
PL4
PLIM
PL5
PLIM
PL6
PLIM
PL7
FC0 FC1
Line card chassis
RP0 RP1
Multiple-Chassis System
Multiple Line-Card Chassis Cross Connected to One or More Fabric Chassis
System Controller 1
Fabric Cards
System Controller 1
Fabric Cards
Fabric chassis
System Controller 1
Fabric Cards
System Controller 1
Fabric Cards
Fabric chassis

1-3
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Chapter 1 Getting Started on the Cisco CRS-1 Router
Logical Routers
Logical Routers
Multiple-chassis Cisco CRS-1 router systems can be partitioned into multiple, independent routers
known as logical routers (LRs). LRs are created by configuring a set of MSCs and at least two Route
Processors (RPs) to act as an independent router.
Logical routers perform routing functions in the same manner as a physical router, but share resources
with the rest of the system. For example, the applications, configurations, protocols, and routing tables
assigned to an LR belong to that LR only, but other functions such as chassis control, Stage 2 (S2) switch
fabric, and partitioning are shared with the rest of the system.
Caution Although the Cisco CRS-1 router operates as a multiple-chassis system that allows for the configuration
of multiple LRs and all their interfaces and resources, Cisco IOS XR Software Releases 2 and 3 operate
in single-chassis systems that are shipped with one default LR. In a single-chassis system, only one LR
is necessary or operable.
Hardware Overview: Single-Chassis System
Cisco IOS XR Software Release 3 supports single-chassis CRS-1 routers, which include the following:
•Up to 8 or 16 Layer-3 MSCs and physical layer interface modules (PLIM) in an 8-slot or 16-slot
chassis
•Up to 0.64 Tbps of routing capacity
•Two dedicated slots for redundant RPs
•Up to 4 or 8 switch fabric cards in an 8-slot or 16-slot chassis
Card Slots in a Cisco CRS-1 16-Slot Line Card Chassis
Each16-slot line card chassis supports a set of cards that performs the routing and management features
of the system (see Figure 1-2).

1-4
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Chapter 1 Getting Started on the Cisco CRS-1 Router
Hardware Overview: Single-Chassis System
Figure 1-2 Cisco CRS-1 16-Slot Line Card Chassis
Table 1-1 lists the slot range for each card type in the 16-slot chassis.
PLIMPLIM
MSC side of chassisPLIM side of chassis
Line card/DRP
15
Line card/DRP
14
Line card/DRP
13
Line card/DRP
12
Line card/DRP
11
Line card/DRP
10
Line card/DRP
9
Line card/DRP
8
MSC (Line card)
7
MSC (Line card)
6
MSC (Line card)
5
MSC (Line card)
4
MSC (Line card)
3 2 1 0
SM0-
SM3
Fabric cards (FC/S)
SM4-
SM7
Fabric cards (FC/S)
FT0 (fan tray)
FT1
101403
PLIM
PL8
PLIM
PL9
PLIM
PL
10
PLIM
PL
11
PLIM
PL
12
PLIM
PL
13
PLIM
PL
14
PLIM
PL
15
MSC (Line card)MSC (Line card)
PLIM
PL0
PLIM
PL1
PLIM
PL2
PLIM
PL3
PLIM
PL4
PLIM
PL5
PLIM
PL6
PLIM
PL7
FC0 FC1
A0
B0
A1
B1
A2
B2
AM0
AM1
RP0 RP1
MSC (Line card) MSC (Line card) MSC (Line card)
Table 1-1 Card Slots in a Cisco CRS-1 16-Slot Line Card Chassis
Card Type Slot
Route Processor RP0 and RP1
MSC (line card) 0–15
Switch fabric module SM0–SM7
Alarm card AM0–AM1
Fan controller card FC0–FC1
PS0 power shelf components A0–A2
PS1 power shelf components B0–B2