Implementing IS-IS on Cisco IOS XR Software

Integrated Intermediate System-to-Intermediate System (IS-IS), Internet Protocol Version 4 (IPv4), is a standards-based Interior Gateway Protocol (IGP).

Cisco IOS XR implements the IP routing capabilities described in International Organization for Standardization (ISO)/International Engineering Consortium (IEC) 10589 and RFC 1995, and adds the standard extensions for single topology and multitopology IS-IS for IP Version 6 (IPv6).

This module describes the new and revised tasks you need to implement IS-IS (IPv4 and IPv6) on your Cisco IOS XR network.

Note For more information about IS-IS on the Cisco IOS XR software and complete descriptions of the IS-IS commands listed in this module, you can refer to the “Related Documents” section of this module. To locate documentation for other commands that might appear while of executing a configuration task, search online in the Cisco IOS XR software master command index.

Feature History for Implementing IS-IS on Cisco IOS XR Software

Release

Modification

Release 2.0

This feature was introduced on the Cisco CRS-1.

 

 

Release 3.0

No modification.

 

 

Release 3.2

Support was added for the Cisco XR 12000 Series Router. The ability to

 

configure a broadcast medium connecting two networking devices as a

 

point-to-point link was added.

 

 

Release 3.2.2

Support was added for the multicast-intact feature.

 

 

Contents

Prerequisites for Implementing IS-IS on Cisco IOS XR Software, page RC-84

Restrictions for Implementing IS-IS on Cisco IOS XR Software, page RC-84

Information About Implementing IS-IS on Cisco IOS XR Software, page RC-84

How to Implement IS-IS on Cisco IOS XR Software, page RC-91

Configuration Examples for Implementing IS-IS on Cisco IOS XR Software, page RC-122

Where to Go Next, page RC-124

Additional References, page RC-124

Cisco IOS XR Routing Configuration Guide

RC-83

Page 99
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Cisco Systems manual Implementing IS-IS on Cisco IOS XR Software, RC-83

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.