Implementing BGP on Cisco IOS XR Software

Information About Implementing BGP on Cisco IOS XR Software

Router Configuration Mode

The following example shows how to enter router configuration mode:

RP/0/RP0/CPU0:router# configuration

RP/0/RP0/CPU0:router(config)# router bgp 140

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

Global Address Family Configuration Mode

The following example shows how to enter global address family configuration mode:

RP/0/RP0/CPU0:router(config)# router bgp 140

RP/0/RP0/CPU0:router(config-bgp)# address-family ipv4 multicast

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

Neighbor Configuration Mode

The following example shows how to enter neighbor configuration mode:

RP/0/RP0/CPU0:router(config)# router bgp 140

RP/0/RP0/CPU0:router(config-bgp)# neighbor 10.0.0.1

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

Neighbor Address Family Configuration Mode

The following example shows how to enter neighbor address family configuration mode:

RP/0/RP0/CPU0:router(config)# router bgp 140

RP/0/RP0/CPU0:router(config-bgp)# neighbor 10.0.0.1

RP/0/RP0/CPU0:router(config-bgp-nbr)# address-family ipv4 unicast

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

Neighbor Submode

Cisco IOS XR BGP uses a neighbor submode to make it possible to enter configurations without having to prefix every configuration with the neighbor keyword and the neighbor address:

Cisco IOS XR software has a submode available for neighbors in which it is not necessary for every command to have a “neighbor x.x.x.x” prefix.

In Cisco IOS XR software, the configuration is as follows:

Router(config-bgp-af)# neighbor 192.23.1.2

Router(config-bgp-nbr)# remote-as 2002

Router(config-bgp-nbr)#address-family ipv4 multicast

An address family configuration submode inside the neighbor configuration submode is available for entering address family-specific neighbor configurations. In Cisco IOS XR, the configuration is as follows:

Router(config-bgp-af)# neighbor 2002::2

Router(config-bgp-nbr)# remote-as 2002

Router(config-bgp-nbr)#address-family ipv6 unicast

Router(config-bgp-nbr-af)# next-hop-self

Router(config-bgp-nbr-af)# route-policy one in

You must enter neighbor-specific IPv4 or IPv6 commands in neighbor address-family configuration submode. In Cisco IOS XR software, the configuration is as follows:

Router(config-bgp)# router bgp 109

Router(config-bgp)#neighbor 192.168.40.24

Cisco IOS XR Routing Configuration Guide

RC-5

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Cisco Systems IOS XR manual Neighbor Submode, Router Configuration Mode, Global Address Family Configuration Mode

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.