Preface

This is the preface for the Cisco IOS XR Routing Configuration Guide.

The preface contains the following sections:

•Document Revision History, page xi

•Obtaining Documentation, page xii

•Documentation Feedback, page xiii

•Cisco Product Security Overview, page xiii

•Obtaining Technical Assistance, page xiv

•Obtaining Additional Publications and Information, page xv

Document Revision History

The Document Revision History table records technical changes to this document. Table 1 shows the document revision number for the change, the date of the change, and a brief summary of the change. Note that not all Cisco documents use a Document Revision History table.

Table 1

Document Revision History

 

 

 

 

Revision

 

Date

Change Summary

 

 

 

OL-5554-05

November

Added description for the OSPFv3 Graceful Restart feature.

 

 

2005

Added descriptions for the multicast-intact option in IS-IS and OSPFv2.

 

 

 

 

 

 

OL-5554-04

August 31,

Implementing IS-IS on Cisco IOS XR Software changes:

 

 

2005

Updated the IS-IS module to include the ability to configure a broadcast

 

 

 

 

 

 

medium connecting two networking devices as a point-to-point link.

 

 

 

OL-5554-02

October 31,

Implementing IS-IS on Cisco IOS XR Software changes:

 

 

2004

Changes to lsp-gen-interval, spf-interval, and show isis spf-log information.

 

 

 

 

 

 

OL-5554-01

July 30, 2004

Initial release of this document.

 

 

 

 

Cisco IOS XR Routing Configuration Guide

xi

Page 10 Page 12
Page 11
Image 11
Cisco Systems IOS XR manual Document Revision History, Revision Date Change Summary
Page 10 Page 12

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