Implementing Routing Policy on Cisco IOS XR Software

How to Implement Routing Policy

 

Command or Action

Purpose

Step 5

 

 

route-policy policy-name{in out}

Attaches the route-policy, which must be well formed

 

 

and predefined.

 

Example:

 

 

RP/0/RP0/CPU0:router(config-bgp-nbr-af)#

 

 

route-policy example1 in

 

Step 6

 

 

end

Saves configuration changes.

 

or

When you issue the end command, the system

 

 

 

commit

prompts you to commit changes:

 

 

Uncommitted changes found, commit them

 

Example:

before exiting(yes/no/cancel)?

 

RP/0/RP0/CPU0:router(config-bgp-nbr-af)# end

[cancel]:

 

 

 

or

Entering yes saves configuration changes to

 

RP/0/RP0/CPU0:router(config-bgp-nbr-af)# commit

 

the running configuration file, exits the

 

 

configuration session, and returns the router

 

 

to EXEC mode.

 

 

Entering no exits the configuration session

 

 

and returns the router to EXEC mode without

 

 

committing the configuration changes.

 

 

Entering cancel leaves the router in the

 

 

current configuration session without exiting

 

 

or committing the configuration changes.

 

 

Use the commit command to save the configuration

 

 

changes to the running configuration file and remain

 

 

within the configuration session.

 

 

 

Modifying a Routing Policy Using the Microemacs Editor

This task explains how to modify an existing routing policy using the microemacs editor.

SUMMARY STEPS

1.edit {route-policy prefix-set as-path-set community-set extended-community-set}name

2.show rpl route-policy name [detail]

3.show rpl prefix-set name

Cisco IOS XR Routing Configuration Guide

RC-240

Page 256
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Cisco Systems IOS XR manual Modifying a Routing Policy Using the Microemacs Editor, RC-240

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.