Implementing Routing Policy on Cisco IOS XR Software

Additional References

pass

endif end-policy

!

route-policy common-inbound apply filter-bogons

set origin igp

set community (2:333) end-policy

!

route-policy set-lpref-prepend($lpref,$as,$prependcnt) set local-preference $lpref

prepend as-path $as $prependcnt end-policy

Translating Cisco IOS Route Maps to Cisco IOS XR Routing Policy Language: Example

RPL performs the same functions as route-maps. See the Converting Cisco IOS Configurations to Cisco IOS XR Configurations guide.

Additional References

The following sections provide references related to implementing RPL.

Related Documents

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Routing policy language commands: complete

Routing Policy Language Commands on Cisco IOS XR Software,

command syntax, command modes, command history,

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defaults, usage guidelines, and examples

 

 

 

Regular expression syntax

“Understanding Regular Expressions, Special Characters and

 

Patterns” appendix in the Cisco IOS XR Getting Started Guide

 

 

Standards

Standards

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Draft-ietf-idr-bgp4-26.txt

A Border Gateway Protocol 4, by Y. Rekhter, T.Li, S. Hares

 

 

Cisco IOS XR Routing Configuration Guide

RC-244

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Cisco Systems manual Routing Policy Language Commands on Cisco IOS XR Software, RC-244

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.