Implementing BGP on Cisco IOS XR Software

How to Implement BGP on Cisco IOS XR Software

Logging Neighbor Changes

Logging neighbor changes is enabled by default. Use the log neighbor changes disable command to turn off logging. The log neighbor changes disable command can also be used to turn logging back on if it has been disabled.

Adjusting BGP Timers

Perform this task to set the timers for BGP neighbors.

BGP uses certain timers to control periodic activities, such as the sending of keepalive messages and the interval after which a neighbor is assumed to be down if no messages are received from the neighbor during the interval. The values set using the timers bgp command can be overridden on particular neighbors using the timers command in the neighbor configuration mode.

SUMMARY STEPS

1.configure

2.router bgp autonomous-system-number

3.timers bgp keepalive hold-time

4.neighbor ip-address

5.timers keepalive hold-time

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 bgp autonomous-system-number

Enters BGP configuration mode allowing you to configure

 

 

the BGP routing process.

 

Example:

 

 

RP/0/RP0/CPU0:router(config)# router bgp 120

 

Step 3

 

 

timers bgp keepalive hold-time

Sets a default keepalive time of 30 seconds and a default

 

 

hold time of 90 seconds for all neighbors.

 

Example:

 

 

RP/0/RP0/CPU0:router(config-bgp)# timers bgp 30

 

 

90

 

 

 

 

Cisco IOS XR Routing Configuration Guide

RC-34

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Cisco Systems IOS XR manual Logging Neighbor Changes, Adjusting BGP Timers, RC-34

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.