Cisco Systems IOS XR manual Saving the Target Configuration to a File

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Chapter 3 Configuring Additional Router Features

Saving and Loading Target Configuration Files

Saving the Target Configuration to a File

To save the configuration changes in the target configuration to a file, enter the show configuration file filename command.

•If the full path of the file is not specified, the default directory for your account is used. You should always save your target configuration files to this location.

•The filename should end with the .cfg suffix for easy identification. This suffix is not required, but can help locate target configuration files. Example: myconfig.cfg

Tip If you have not changed directories since login, you can display your default directory by entering the pwd command.

In the following example, a target configuration file is saved to the root of disk0:

RP/0/RP0/CPU0:router# configure

RP/0/RP0/CPU0:router(config)# show configuration file disk0:myconfig.cfg

RP/0/RP0/CPU0:router(config)# abort

RP/0/RP0/CPU0:router#

Loading the Target Configuration from a File

Enter the load filename command to populate the target configuration with the contents of a previously saved configuration file. Consider the following when entering the filename argument:

•The filename argument specifies the configuration file to be loaded into the target configuration.

•If the full path of the file is not specified, the default location is used. You should always save your target configuration files to this location.

In the following example, a target configuration file is loaded into the current configuration session. The current configuration session is therefore populated with the contents of the file:

RP/0/RP0/CPU0:router# configure

RP/0/RP0/CPU0:router(config)# load disk0:myconfig.cfg

RP/0/RP0/CPU0:router(config)# show configuration

Building configuration...

interface POS 0/3/0/0

description My Pos Interface

ipv4

address 10.10.11.20 255.0.0.0 !end

Loading an Alternative Configuration at System Startup

When a router is reset or powered on, the last running configuration is loaded and used to operate the router.

You can also load an alternative configuration during system boot. See Appendix A, “Router Recovery and Management with ROM Monitor,” for information and instructions on this process.

Cisco IOS XR Getting Started Guide

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Contents Configuring Additional Router Features ContentsDomain name-server ipv4-address Commit End Show hosts Configuring Telnet, HTTP, and XML Host ServicesConfigure Related Topic Document TitleInstallation and activation of the Manageability Managing Configuration History and RollbackFollowing example, the host services are enabled Descriptions of the Telnet commandsDisplaying the CommitIDs Show configuration commit list command display Displaying the Configuration History LogRP/0/RP0/CPU0router# show configuration commit list Configuration commit history Displaying the Configuration Changes Recorded in a CommitIDPreviewing Rollback Configuration Changes RP/0/0/CPU0router# show configuration commit changesRP/0/RP0/CPU0router# show configuration rollback changes to Rolling Back the Configuration to a Specific Rollback PointRP/0/RP0/CPU0router# rollback configuration to Loading the Configuration Changes for a Specific CommitID RP/0/RP0/CPU0router# rollback configuration lastSaving and Loading Target Configuration Files Deleting CommitIDsLoading the Target Configuration from a File Saving the Target Configuration to a FileLoading an Alternative Configuration at System Startup Logging Destination Command Global Configuration Mode Configuring Logging and Logging CorrelationAlarm Logging Correlation Logging Locations and Severity LevelsCommand or Action Purpose Configuring Basic Message LoggingExample Running configuration When a severity level is specified, onlyCommits the target configuration to the router Ends the configuration session and returns toConfiguration of alarm correlation and generating Configuration of system loggingCommands used to configure logging Creating and Modifying User Accounts and User GroupsConfiguring User Accounts Command DescriptionCreating Users and Assigning Groups Password 0 7 passwordEnd or commit Modify user groups, and configure remote AAA access Configuration LimitingCreate users, assign users to user groups, create Maximum Configuration Command Show Current Settings Command Static Route Configuration LimitsDefault Absolute Exec ModeLimit Mode Exec Mode IS-IS Configuration LimitsOSPFv2 and v3 Configuration Limits Maximum-redistributed-prefixes n Show isis adjacencyMaximum redistributed-prefix n Show ospf Maximum paths n Show running-config router ospfMaximum interfaces n Show ospf If the maximum pathsMaximum Interfaces for Each Ospf Instance Feature Limit Description BGP Configuration LimitsDefault Absolute Maximum Configuration Command Maximum-prefix n Show bgp neighbor IPaddressMaximum-paths n Show running-config Maximum pathsRouting Policy Language Line and Policy Limits RP/0/RP1/CPU0router# show rpl maximum Multicast Configuration Limits Limit Global Configuration Mode Exec ModeMpls Configuration Limits Other Configuration Limits
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IOS XR specifications

Cisco Systems IOS XR is an advanced operating system designed specifically for high-performance routers and service provider networks. It serves as the backbone for many of Cisco's high-end routing platforms, enabling service providers to manage their networks with increased efficiency, flexibility, and scalability.

One of the main features of IOS XR is its modular architecture. This allows for the independent operation of various components within the OS, facilitating the deployment of new features and updates without affecting the overall stability of the system. This modularity ensures that service providers can implement rapid changes and enhancements while maintaining service continuity.

Another characteristic of IOS XR is its support for 64-bit architecture, which provides enhanced performance and the ability to manage larger amounts of data. This is particularly beneficial for service providers that deal with high traffic volumes and require robust data processing capabilities. The utilization of 64-bit technology also enables the operating system to utilize memory more efficiently, allowing for greater scalability.

IOS XR incorporates advanced technologies such as Distributed System Architecture (DSA) and Multiple Routing Instances (Merging Routes). DSA allows for the distribution of routing processes across multiple hardware resources, maximizing performance and redundancy. Multiple Routing Instances enable operators to create separate logical routing tables for different services, improving isolation and efficiency in managing network traffic.

The operating system also focuses heavily on security, featuring extensive encryption methods and access controls to safeguard network resources. IOS XR supports various authentication protocols, ensuring secure access to routers and switches. In addition, the OS includes comprehensive logging and monitoring capabilities, allowing network administrators to track activities and respond quickly to potential threats.

Another critical aspect of IOS XR is its adherence to the principles of service-oriented architecture (SOA). This approach permits the development of applications and services that can operate independently, fostering innovation and enabling service providers to tailor their offerings based on customer demands.

Ultimately, Cisco IOS XR is a powerful, reliable operating system that meets the complex needs of modern telecommunications networks. With its focus on modularity, performance, security, and scalability, it enables service providers to deliver high-quality, resilient services to their customers while efficiently managing network resources. As the industry continues to evolve, IOS XR remains a vital tool for those aiming to stay competitive in the ever-changing landscape of networking.
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