Implementing Routing Policy on Cisco IOS XR Software

Information About Implementing Routing Policy

RP/0/RP0/CPU0:router# edit route-policy policy_A

----------------------------------------

== MicroEMACS 3.8b () == rpl_edit.139281 == if destination in (2001::/8) then

drop

endif end-policy

!

== MicroEMACS 3.8b () == rpl_edit.139281 == Parsing.

83 bytes parsed in 1 sec (82)bytes/sec Committing.

1 items committed in 1 sec (0)items/sec Updating.

Updated Commit database in 1 sec

RP/0/RP0/CPU0:router#

If there are parse errors, you are asked whether editing should continue:

RP/0/RP0/CPU0:router#edit route-policy policy_B

==MicroEMACS 3.8b () == rpl_edit.141738 route-policy policy_B

set metric-type type_1

if destination in (2001::/8) then drop

endif end-policy

!

==MicroEMACS 3.8b () == rpl_edit.141738 == Parsing.

105 bytes parsed in 1 sec (103)bytes/sec

%Syntax/Authorization errors in one or more commands.!! CONFIGURATION FAILED DUE TO SYNTAX/AUTHORIZATION ERRORS

set metric-type type_1

if destination in (2001::/8) then drop

endif end-policy

!

Continue editing? [no]:

If you answer yes, the editor continues on the text buffer from where you left off. If you answer no, the running configuration is not changed and the editing session is ended.

Editing Routing Policy Configuration Elements Using the CLI

The CLI allows you to enter and delete route policy statements. You can complete a policy configuration block by entering applicable commands such as end-policyor end-set. Alternatively, the CLI interpreter allows you to use the exit command to complete a policy configuration block. The abort command is used to discard the current policy configuration and return to global configuration mode.

Cisco IOS XR Routing Configuration Guide

RC-236

Page 252
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Cisco Systems IOS XR manual Editing Routing Policy Configuration Elements Using the CLI, RC-236

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.