Cisco ASR 9000 User Manual

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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-28417-02
Troubleshooting the Cisco IOS XR Software
Basic Troubleshooting Commands
Examples
The following example shows how the route for an IP address appears:
RP/0/RSP0/CPU0:router# traceroute 10.233.233.233
Mon May 31 23:55:23.034 DST
Type escape sequence to abort.
Tracing the route to 10.233.233.233
1 ce28 (172.29.52.1) 2 msec 1 msec 0 msec
2 172.24.114.17 0 msec 0 msec 0 msec
3 172.24.114.17 !A * !A
Using the debug Commands
Debug commands are used to diagnose and resolve network problems. Use debug commands to
troubleshoot specific problems or during troubleshooting sessions.
Use debug commands to turn on or off debugging for a specific service or subsystem. When debugging
is turned on for a service, a debug message is generated each time the debugging code section is entered.
The following sections provide information on debugging:
• Displaying a List of Debug Features, page 139
• Enabling Debugging for a Feature, page 141
• Disabling Debugging for a Service, page 142
• Displaying Debugging Status, page 141
• Disabling Debugging for All Services Started at the Active Terminal Session, page 142
• Disabling Debugging for All Services Started at All Terminal Sessions, page 142
Caution Debug commands can generate a large amount of output and can render the system unusable. Use the
debug commands to troubleshoot specific problems or during specific troubleshooting sessions on
systems that are not in production.
Displaying a List of Debug Features
To display a list of the available debug features, enter the debug mode and enter a ? for on-screen help.
The set of debug mode features is different in EXEC and administration EXEC modes. In the following
example, EXEC mode is the entry point to debug mode:
RP/0/RSP0/CPU0:router# debug
RP/0/RSP0/CPU0:router(debug)# ?
IntCtrl Debug IntCtrl Driver
MgmtMultilink MgmtMultilink controller debugging
aaa AAA Authentication, Authorization and Accounting
access-list Debug ethernet-services access-lists
accounting Turn on Accounting debug
adjacency platform AIB information
afmon-ea debug afmon-ea services
afmon-lib debug afmon client library specific function calls
afmon-ma Debug afmon-ma services

Cisco ASR 9000 Specifications

General

Operating System	Cisco IOS XR
Management	CLI, SNMP, NETCONF, RESTCONF
Type	Edge Router
Interface Support	10G, 40G, 100G, 400G
Power Supply	AC and DC options available
Routing Protocol	BGP, IS-IS, OSPF, EIGRP
Storage	SSD
Operating Temperature	0 to 40°C (32 to 104°F)
Humidity	5 to 95% (noncondensing)
Redundancy	Yes (Power, Fabric, Route Processor)
MTBF	Varies by model (typically > 200, 000 hours)

Summary

Introduction to the Cisco ASR 9000 Series Aggregation Services Router

Management and Security Features

Initial Router Configuration

Explains the initial router configuration process upon booting.

Router Management Interfaces

Selecting and Identifying the Active RSP/DSC

Guides on selecting and identifying the active RSP/DSC for router operation.

Connecting to the Router via Console Port

Provides steps for connecting to the router using the console port for initial setup.

Bringing Up Cisco IOS XR Software on the Router

Prerequisites for Bringing Up IOS XR Software

Bringing Up and Configuring a Standalone Router

Guides on connecting and configuring username/password for a standalone router.

Verifying System After Initial Boot

Provides procedures to verify the router's status after the initial boot.

Configuring General Router Features

Connecting and Communicating with the Router

Explains how to establish communication with the router via CLI.

Logging In to a Router or SDR

Details the process of logging into the router using username and password.

User Access Privileges

Navigating Cisco IOS XR Command Modes

Managing Configuration Sessions

Details the two-stage process for making and committing configuration changes.

Configuring Additional Router Features

Configuring Telnet, HTTP, and XML Host Services

Managing Configuration History and Rollback

Explains how to manage committed configuration changes and perform rollbacks.

Creating and Modifying User Accounts and Groups

CLI Tips, Techniques, and Shortcuts

CLI Tips and Shortcuts

Displaying System Information with show Commands

Explains how to use show commands to display system status and configuration.

Troubleshooting the Cisco IOS XR Software

Basic Troubleshooting Commands

Introduces basic commands for diagnosing connectivity and router operation.

Configuration Error Messages

Explains how to display and interpret configuration error messages.

Memory Warnings in Configuration Sessions

Covers low-memory warnings and how to resolve them.

Troubleshooting Interfaces Not Coming Up

Provides steps to verify and troubleshoot interface status issues.