Implementing IS-IS on Cisco IOS XR Software

How to Implement IS-IS on Cisco IOS XR Software

Configuring Authentication for IS-IS

This task explains how to configure authentication for IS-IS. This task is optional.

Authentication is available to limit the establishment of adjacencies by using the hello-passwordconfiguration, and to limit the exchange of LSPs by using the LSP password.

IS-IS supports plain-text authentication, which does not provide security against hackers or other unauthorized users. Plain-text authentication allows you to configure a password to prevent unauthorized networking devices from forming adjacencies with this router. The password is exchanged as plain text and is potentially visible to an agent able to view the IS-IS packets.

IS-IS stores a configured password using simple encryption. However, the plain-text form of the password is used in LSPs, sequence number protocols (SNPs), and hello packets, which would be visible to a process that can view IS-IS packets. The passwords can be entered in plain text (preceded by a 0) or encrypted (preceded by a 7) form.

To set the domain password, configure the lsp-passwordfor Level 2; to set the area password, configure the lsp-passwordfor Level 1.

SUMMARY STEPS

1.configure

2.router isis instance-id

3.lsp-password {hmac-md5 text} {clear encrypted} password [level {1 2}] [send-only] [snp send-only]

4.interface type instance

5.hello-password {hmac-md5 text} {clear encrypted} password [level {1 2}] [send-only]

6.end or commit

DETAILED STEPS

 

Command or Action

Purpose

Step 1

 

 

configure

Enters global configuration mode.

 

Example:

 

 

RP/0/RP0/CPU0:router# configure

 

Step 2

 

 

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-type

 

 

command.

 

 

 

Cisco IOS XR Routing Configuration Guide

RC-108

Page 124
Image 124
Cisco Systems IOS XR manual Configuring Authentication for IS-IS, RC-108

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.