Implementing OSPF on Cisco IOS XR Software

How to Implement OSPF on Cisco IOS XR Software

 

Command or Action

Purpose

Step 8

 

 

message-digest-key key-idmd5 {key clear key

Defines an OSPF virtual link.

 

encrypted key}

• See the “Virtual Link and Transit Area for OSPF”

 

 

 

Example:

section on page RC-138to understand a virtual link.

 

• The key-idargument is a number in the range from 1 to

 

RP/0/RP0/CPU0:router(config-ospf-ar-vl)#

 

255. The key argument is an alphanumeric string of up

 

message-digest-key 4 md5 yourkey

 

 

to 16 characters. The routers at both ends of the virtual

 

 

link must have the same key identifier and key to be

 

 

able to route OSPF traffic.

 

 

• The authentication-keykey command is not supported

 

 

for OSPFv3.

 

 

• Once the key is encrypted it must remain encrypted.

Step 9

 

 

Repeat all of the steps in this task on the ABR that is

—

 

at the other end of the virtual link. Specify the same

 

 

key ID and key that you specified for the virtual link

 

 

on this router.

 

Step 10

 

 

end

Saves configuration changes.

 

or

• When you issue the end command, the system prompts

 

 

 

commit

you to commit changes:

 

 

Uncommitted changes found, commit them before

 

Example:

exiting(yes/no/cancel)?

 

RP/0/RP0/CPU0:router(config-ospf-ar-vl)# end

[cancel]:

 

 

 

or

– Entering yes saves configuration changes to the

 

RP/0/RP0/CPU0:router(config-ospf-ar-vl)# commit

 

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.

Step 11

 

 

show ospf [process-name][area-id]

(Optional) Displays the parameters and the current state of

 

virtual-links

OSPF virtual links.

 

or

 

 

show ospfv3 [process-name]virtual-links

 

 

Example:

 

 

RP/0/RP0/CPU0:router# show ospf 1 2

 

 

virtual-links

 

 

or

 

 

RP/0/RP0/CPU0:router# show ospfv3 1

 

 

virtual-links

 

 

 

 

Cisco IOS XR Routing Configuration Guide

RC-163

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Cisco Systems IOS XR manual RC-163
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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.
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