RC-91

Implementing IS-IS on Cisco IOS XR Software

How to Implement IS-IS on Cisco IOS XR Software

This section contains the following procedures:

•Enabling IS-IS and Configuring Level 1 or Level 2 Routing, page RC-91(required)

•Configuring Single Topology for IS-IS, page RC-93(required)

•Configuring Multitopology for IS-IS, page RC-98(optional)

•Controlling LSP Flooding for IS-IS, page RC-102(optional)

•Configuring Nonstop Forwarding for IS-IS, page RC-106(optional)

•Configuring Authentication for IS-IS, page RC-108(optional)

•Configuring MPLS Traffic Engineering for IS-IS, page RC-110(optional)

•Tuning Adjacencies for IS-IS on Point-to-Point Interfaces, page RC-113(optional)

•Setting SPF Interval for a Single-Topology IPv4 and IPv6 Configuration, page RC-116(optional)

•Enabling Multicast-Intact for IS-IS, page RC-118(optional)

Note To save configuration changes, you must commit changes when the system prompts you.

Enabling IS-IS and Configuring Level 1 or Level 2 Routing

This task explains how to enable IS-IS and configure the routing level for an area.

Note Configuring the routing level in Step 4 is optional, but is highly recommended to establish the proper level of adjacencies.

Prerequisites

Although you can configure IS-IS before you configure an IP address, no IS-IS routing occurs until at least one IP address is configured.

SUMMARY STEPS

1.configure

2.router isis instance-id

3.net network-entity-title

4.is-type {level-1 level-1-2 level-2-only}

5.end or commit

6.show isis [instance instance-id]protocol

Cisco IOS XR Routing Configuration Guide

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.

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

Models: IOS XR