Implementing IS-IS on Cisco IOS XR Software

How to Implement IS-IS on Cisco IOS XR Software

 

Command or Action

Purpose

Step 4

 

 

exit

Exits interface configuration mode, and returns the router to

 

 

global configuration mode.

 

Example:

 

 

RP/0/RP0/CPU0:router(config-if)# exit

 

Step 5

 

 

router isis instance-id

Enables IS-IS routing for the specified routing instance, and

 

 

places the router in router configuration mode.

 

Example:

You can change the level of routing to be performed by

 

RP/0/RP0/CPU0:router(config)# router isis isp

a particular routing instance using the is-typerouter

 

 

configuration command.

Step 6

 

 

net network-entity-title

Configures NETs for the routing instance.

 

 

Specify a NET for each routing instance if you are

 

Example:

configuring multi-instance IS-IS. You can specify a

 

RP/0/RP0/CPU0:router(config-isis)# net

name for a NET and for an address.

 

47.0004.004d.0001.0001.0c11.1110.00

This example configures a router with area ID

 

 

 

 

47.0004.004d.0001 and system ID 0001.0c11.1110.10.

 

 

To specify more than one area address, specify

 

 

additional NETs. Although the area address portion of

 

 

the NET differs, the system ID portion of the NET must

 

 

match exactly for all of the configured items.

Step 7

 

 

interface type instance

Enters interface configuration mode.

 

Example:

 

 

RP/0/RP0/CPU0:router(config-isis)# interface

 

 

POS 0/1/0/4

 

Step 8

 

 

address-family ipv4 [unicast]

Specifies the IPv4 address family and enters interface

 

 

address family configuration mode.

 

Example:

This example specifies the unicast IPv4 address family.

 

RP/0/RP0/CPU0:router(config-isis-if)#

 

 

address-family ipv4 unicast

 

Step 9

 

 

exit

Exits interface configuration mode, and returns the router to

 

 

interface configuration mode.

 

Example:

 

 

RP/0/RP0/CPU0:router(config-if)# exit

 

Step 10

 

 

address-family ipv6 [unicast]

Specifies the IPv6 address family and enters interface

 

 

address family configuration mode.

 

Example:

This example specifies the unicast IPv6 address family.

 

RP/0/RP0/CPU0:router(config-isis-if)#

 

 

address-family ipv6 unicast

 

 

 

 

Cisco IOS XR Routing Configuration Guide

RC-100

Page 116
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Cisco Systems IOS XR manual RC-100

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.