Implementing BGP on Cisco IOS XR Software

Information About Implementing BGP on Cisco IOS XR Software

Last reset 00:00:25, due to BGP neighbor initialized

External BGP neighbor not directly connected.

The inheritance rules used when groups are inheriting configuration from other groups are the same as the rules given for neighbors inheriting from groups.

Template Inheritance

You can use the following show commands described to monitor BGP inheritance information:

show bgp neighbors, page RC-11

show bgp af-group, page RC-12

show bgp session-group, page RC-13

show bgp neighbor-group, page RC-14

show bgp neighbors

Use the show bgp neighbors command to display information about the BGP configuration for neighbors.

Use the configuration keyword to display the effective configuration for the neighbor, including any settings that have been inherited from session groups, neighbor groups, or address family groups used by this neighbor.

Use the inheritance keyword to display the session groups, neighbor groups, and address family groups from which this neighbor is capable of inheriting configuration .

The show bgp neighbors command examples that follow are based on the sample configuration:

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

RP/0/RP0/CPU0:router(config-bgp)#af-group GROUP_3 address-family ipv4 unicast

RP/0/RP0/CPU0:router(config-bgp-afgrp)# next-hop-self

RP/0/RP0/CPU0:router(config-bgp-afgrp)# route-policy POLICY_1 in

RP/0/RP0/CPU0:router(config-bgp0afgrp)# exit

RP/0/RP0/CPU0:router(config-bgp)# session-group GROUP_2

RP/0/RP0/CPU0:router(config-bgp-sngrp)# advertisement-interval 15

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

RP/0/RP0/CPU0:router(config-bgp)# neighbor-group GROUP_1

RP/0/RP0/CPU0:router(config-bgp-nbrgrp)# use session-group GROUP_2

RP/0/RP0/CPU0:router(config-bgp-nbrgrp)# ebgp-multihop 3

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

RP/0/RP0/CPU0:router(config-bgp-nbrgrp-af)# weight 100

RP/0/RP0/CPU0:router(config-bgp-nbrgrp-af)# send-community-ebgp

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

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

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

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

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

RP/0/RP0/CPU0:router(config-bgp)# neighbor 192.168.0.1

RP/0/RP0/CPU0:router(config-bgp-nbr)# remote-as 2

RP/0/RP0/CPU0:router(config-bgp-nbr)# use neighbor-group GROUP_1

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

RP/0/RP0/CPU0:router(config-bgp-nbr-af)# use af-group GROUP_3

RP/0/RP0/CPU0:router(config-bgp-nbr-af)# weight 200

Cisco IOS XR Routing Configuration Guide

RC-11

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Image 27
Cisco Systems IOS XR manual Template Inheritance, Show bgp neighbors, RC-11

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.