Cisco Systems IOS XR manual Displaying the CommitIDs

Page 4

Chapter 3 Configuring Additional Router Features

Managing Configuration History and Rollback

When multiple commitIDs are present, you can use a commitID to identify a previous configuration to which you want to return, or you can use the commitID to load the configuration changes made during that configuration session. You can also load configuration changes from multiple commitIDs, and you can clear commitIDs. If you are thinking about rolling back the configuration to a specific commitID, consider the following guidelines:

•You cannot roll back to a configuration that was removed because of package incompatibility. Configuration rollbacks can succeed only when the configuration passes all compatibility checks with the currently active Cisco IOS XR software.

•If an incompatible configuration is found during the rollback operation, the operation fails and an error is displayed.

The Cisco IOS XR software automatically saves up to 100 of the most recent commitIDs. The following sections describe how to manage configuration changes and roll back to a previously committed configuration:

•Displaying the CommitIDs, page 3-4

•Displaying the Configuration History Log, page 3-5

•Displaying the Configuration Changes Recorded in a CommitID, page 3-6

•Previewing Rollback Configuration Changes, page 3-6

•Rolling Back the Configuration to a Specific Rollback Point, page 3-7

•Rolling Back the Configuration over a Specified Number of Commits, page 3-7

•Loading the Configuration Changes for a Specific CommitID, page 3-8

•Loading Rollback Configuration Changes to the Target Configuration, page 3-8

•Deleting CommitIDs, page 3-9

Displaying the CommitIDs

To display a history of up to 100 of the most recent commitIDs, enter the show configuration commit list command in EXEC mode. Up to 100 of the most recent commitIDs are saved by the system. Each commitID entry shows the user who committed configuration changes, the connection used to execute the commit, and commitID time stamp.

Cisco IOS XR Getting Started Guide

3-4

Page 3 Page 5
Image 4
Page 3 Page 5
Contents Configuring Additional Router Features ContentsConfiguring Telnet, HTTP, and XML Host Services ConfigureDomain name-server ipv4-address Commit End Show hosts Related Topic Document TitleManaging Configuration History and Rollback Following example, the host services are enabledInstallation and activation of the Manageability 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 Displaying the Configuration Changes Recorded in a CommitID Previewing Rollback Configuration ChangesConfiguration commit history 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 Configuring Logging and Logging Correlation Alarm Logging CorrelationLogging Destination Command Global Configuration Mode Logging Locations and Severity LevelsCommand or Action Purpose Configuring Basic Message LoggingExample When a severity level is specified, only Commits the target configuration to the routerRunning configuration Ends the configuration session and returns toConfiguration of system logging Commands used to configure loggingConfiguration of alarm correlation and generating 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 Static Route Configuration Limits Default AbsoluteMaximum Configuration Command Show Current Settings Command Exec ModeIS-IS Configuration Limits OSPFv2 and v3 Configuration LimitsLimit Mode Exec Mode Maximum-redistributed-prefixes n Show isis adjacencyMaximum paths n Show running-config router ospf Maximum interfaces n Show ospfMaximum redistributed-prefix n Show ospf If the maximum pathsMaximum Interfaces for Each Ospf Instance BGP Configuration Limits Default Absolute Maximum Configuration CommandFeature Limit Description 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
Related manuals
Manual 282 pages 23.45 Kb

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.
Top Page Image Contents