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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). Cisco CRS-1 Series Carrier Routing System Getting Started Guide 1-3

Section	Page
Cisco CRS-1 Series Carrier Routing System Getting Started Guide	1
Contents	3
Preface	11
Introduction	11
About This Document	11
Intended Audience	12
Organization of the Document	12
Related Documents	12
Conventions	13
Obtaining Documentation	13
Cisco.com	13
Ordering Documentation	14
Documentation Feedback	14
Obtaining Technical Assistance	14
Cisco Technical Support Website	14
Submitting a Service Request	15
Definitions of Service Request Severity	15
Obtaining Additional Publications and Information	16
Getting Started on the CiscoCRS-1Router	17
Contents	17
Basic System Configurations	17
Logical Routers	19
Hardware Overview: Single-Chassis System	19
Card Slots in a Cisco CRS-1 16-Slot Line Card Chassis	19
Card Slots in a Cisco CRS-1 8-Slot Line Card Chassis	21
Line Cards and Physical Layer Interface Modules	22
Switch Fabric Modules	22
Route Processors	23
Additional Hardware Documentation	25
User Interfaces	25
Command-Line Interface	25
Craft Works Interface	25
Extensible Markup Language API	26
Simple Network Management Protocol	27
File Storage	27
Sandisk Flash Disks	28
Hard Disk	29
CiscoIOSXR Basic Configuration Management	31
Contents	31
Connecting and Communicating with the Router	31
Logging In to the Router	34
CLI Prompt	34
User Access Privileges	35
User Groups	36
Predefined User Groups	36
Task IDs	36
Displaying the User Groups and Task IDs for Your User Account	37
Navigating the CiscoIOSXR Command Modes	38
Identifying the Command Mode in the CLI Prompt	39
Summary of Common Command Modes	40
Entering EXEC Commands from a Configuration Mode	42
Command Mode Navigation Example	43
Managing Configuration Sessions	44
Stage 1: Enter Configuration Changes to the Nonactive Target Configuration	45
Stage 2: Commit Changes to the Running Configuration	45
Displaying Configuration Details with show Commands	46
Commit Options	48
Displaying Configuration Errors	49
Clearing All Changes to a Target Configuration	50
Ending a Configuration Session	51
Locking and Unlocking the Running Configuration During Configuration Sessions	52
Configuration History and Rollback	53
Displaying the Rollback Points	54
Displaying Configuration Changes for Rollback Points	54
Rolling Back the Configuration to a Specific Rollback Point	55
Rolling Back the Configuration to a Specified Number of Commits	55
Displaying the Configuration History Log	56
Configuration Change Notification	56
Saving and Loading Target Configuration Files	57
Saving the Target Configuration to a File	58
Loading the Target Configuration from a File	58
Loading an Alternative Configuration at System Startup	58
Configuration File Storage	59
Impact of Software Package Activation and Deactivation	59
Addition or Removal of CLI Commands During Package Activation or Deactivation	59
Impact of Package Activation or Deactivation on the Running Configuration	59
Impact of Package Activation or Deactivation on the Configuration Rollback	60
CLI Tips, Techniques, and Shortcuts	61
Contents	61
CLI Tips and Shortcuts	61
Entering Abbreviated Commands	62
Using the Question Mark (?) to Display On-Screen Command Help	62
Completing a Partial Command with the Tab Key	64
Identifying Command Syntax Errors	64
Using the no and default Forms of a Command	64
Editing Command Lines that Wrap	65
Displaying System Information with show Commands	66
Common show Commands	66
Browsing Display Output when the --More-- Prompt Appears	67
Halting the Display of Screen Output	67
Redirecting Output to a File	68
Narrowing Output from Large Configurations	68
Filtering show Command Output	69
Wildcards, Templates, and Aliases	71
Using Wildcards to Identify Interfaces in show Commands	71
Creating Configuration Templates	73
Applying Configuration Templates	75
Aliases	77
Keystrokes Used as Command Aliases	78
Command History	78
Recalling Previously Entered Commands	79
Recalling Deleted Entries	79
Redisplaying the Command Line	80
Key Combinations	80
Key Combinations to Move the Cursor	80
Keystrokes to Control Capitalization	80
Keystrokes to Delete CLI Entries	81
Transposing Mistyped Characters	81
Bringing up a New Cisco CRS-1 Router	83
Contents	83
Hardware Prerequisites and Documentation	83
Hardware Component and Architecture Overview	83
Site Planning, Equipment Unpacking, and Router Installation	84
Bringing Up a Single-Chassis System for the First Time	84
Powering On a Single-Chassis System for the First Time	85
Entering the Initial Configuration Using the Setup Mode Prompts	87
Verifying the System After Initial Bring Up	91
Examples of show Commands	91
Initial Configuration of the CiscoIOSXR Software	95
Contents	95
Configuring the Router Hostname	95
Configuring the Management Ethernet Interface	96
Specifying the Management Ethernet Interface in CLI Commands	96
Displaying the Available Management Ethernet Instance	97
Configuring the Management Ethernet Interface	98
Configuring the Domain Name and Domain Name Server	100
Configuring Telnet, HTTP, and XML Host Services	101
Prerequisites	102
Installing the Optional Craft Works Interface	102
Manually Setting the Router Clock	103
Configuring Logging and Logging Correlation	105
Logging Locations and Severity Levels	105
Alarm Logging Correlation	106
Configuring Basic Message Logging	106
Creating and Modifying User Accounts and User Groups	108
Displaying Details About User Accounts, User Groups, and Task IDs	109
Configuring User Accounts	109
Predefined User Groups	110
Creating Users and Assigning Groups	111
Configuration Limiting	112
Static Route Configuration Limits	113
IS-IS Configuration Limits	114
OSPFv2 and v3 Configuration Limits	114
BGP Configuration Limits	117
Routing Policy Language Line and Policy Limits	118
Multicast Configuration Limits	119
MPLS Configuration Limits	120
Other Configuration Limits	120
Managing CiscoIOSXR Software Packages	123
Contents	123
Overview of Software Packages	123
Software Packages	123
Available Packages	124
Package Installation Envelope Files	132
Standard PIE Filenames and Version Numbers	133
Software Maintenance Update PIE Filenames and Version Numbers	134
Selecting and Obtaining Software Packages	137
Obtaining CiscoIOSXR Software and Version Information from Cisco	137
Where to Obtain Installable PIE Files	137
Information About Package Management	139
Overview of Package Management	139
Upgrading Packages	140
Downgrading Packages	141
Impact of Package Version Changes	141
Impact of Package Activation and Deactivation	141
Activation and Deactivation Prerequisites	142
Package Management Procedures	142
Displaying the Active Packages for All Cards	143
Displaying the Active Packages for a Single Card	144
Copying, Adding, and Activating Packages	144
Rolling Back to Committed Software	149
Committing the Active Software Change	150
Displaying the Committed Package Versions for Each Card	150
Removing Inactive Packages from the Router	151
Configuration Examples for Managing Packages	152
Copying and Adding a Package to the Router: Example	152
Activating and Testing a Package on the Router: Example	153
Activating a Package on the Router: Example	155
RP Redundancy and Hardware Administration on CiscoIOSXR Software	157
Contents	157
Commands to Display Hardware Status	157
Examples of Hardware Show Commands	158
Command Syntax for Hardware Nodes (location nodeID)	160
Configure Routing Interfaces	163
Physical Components of Routing Interfaces	163
Configuring Interfaces in the CiscoIOSXR Software	167
RP Redundancy and Failover	175
Determining the Primary RP	175
Role of the Standby RP	176
Summary of Redundancy Commands	176
Automatic Failover	176
RP Redundancy During RP Reset	176
Manual Failover	177
Communicating with a Standby RP	178
Reloading, Shutting Down, or Power Cycling a Node	178
Reloading the Primary RP	179
Administratively Shutting Down or Powering On or Off a Node	180
Using Controller Commands to Manage Hardware Components	180
Formatting Hard Drives, Flash Drives, and Other Storage Devices	181
Online Insertion and Removal for Switch Fabric Cards	183
Contents	183
Information About OIR	183
Performing an OIR	183
Troubleshooting the CiscoIOSXR Software	187
Contents	187
Additional Sources for Information	187
Basic Troubleshooting Commands	188
Using show Commands to Display System Status and Configuration	188
Using the ping Command	189
Using the traceroute Command	189
Using debug Commands	190
Understanding Processes and Threads	192
Commands Used to Display Process and Thread Details	193
Commands Used to Manage Process and Threads	198
Configuration Error Messages	199
Configuration Failures During a Commit Operation	199
Configuration Errors at Startup	200
Memory Warnings in Configuration Sessions	200
Understanding Low-Memory Warnings in Configuration Sessions	201
Displaying System Memory Information	202
Removing Configurations to Resolve Low-Memory Warnings	203
Contacting TAC for Additional Assistance	206
Interfaces Not Coming Up	206
Verifying the System Interfaces	207
ROM Monitor Guide	211
Contents	211
Entering ROM Monitor Mode	211
Resetting the Configuration Register and Reloading the Router	212
Manually Halting the Initialization Process During System Reload	215
Setting Configuration Register Values	216
Commonly Used Configuration Register Value Settings	216
Changing the Configuration Register Setting from EXEC Mode	216
Changing the Configuration Register from ROM Monitor Mode	218
Reinstalling the CiscoIOSXR Software from ROMMON	219
Contents	220
ROMMON Software Installation Overview	220
Locating Installable Files	222
.vm Filenames and Version Numbers	223
tar Filenames and Version Numbers	224
Reinstalling the Software from an Image Located on a TFTP Server	226
Reinstalling the Software from a .vm File Located on Flash disk1:	230
What to Do Next	234
Specifying an Alternative Configuration	234
Specifying a Temporary Configuration File with the -a Boot Option	235
Specifying a Permanent Configuration File with the IOX_CONFIG_FILE= Variable	235
Disaster Recovery	235
Recovering the Root Password	236
Displaying the Available ROM Monitor Commands and Options	236
Exiting ROM Monitor Mode	237
Resetting to EXEC Mode with CLI Commands	238
Resetting to EXEC Mode Using Prompts	238
Upgrading and Downgrading ROM Monitor Software	241
Contents	241
Information About ROM Monitor Software	241
ROM Monitor Upgrade and Downgrade Basics	241
How to Upgrade or Downgrade ROM Monitor	243
Upgrading or Downgrading ROM Monitor	243
Configuration Examples for ROM Monitor Upgrades	246
ROM Monitor Upgrade: Example	247
Additional References	252
Related Documents	252
Technical Assistance	252
Understanding Regular Expressions, Special Characters, and Patterns	253
Regular Expressions	253
Special Characters	254
Character Pattern Ranges	254
Multiple-Character Patterns	255
Complex Regular Expressions Using Multipliers	255
Pattern Alternation	256
Anchor Characters	256
Underscore Wildcard	256
Parentheses Used for Pattern Recall	256

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1-3

Cisco CRS-1 Series Carrier Routing System Getting Started Guide

Chapter 1

Getting Started on the Cisco CRS-1 Router

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