Administrator Guide

The following illustration shows the configurations described on the following examples. These
configurations show how to create BGP areas using physical and virtual links. They include setting up the
interfaces and peers groups with each other.
Figure 25. Sample Configurations
Example of Enabling BGP (Router 1)
Example of Enabling BGP (Router 2)
Example of Enabling BGP (Router 3)
Example of Enabling Peer Groups (Router 1)
Example of Enabling Peer Groups (Router 2)
Example of Enabling Peer Groups (Router 3)
R1# conf
R1(conf)#int loop 0
R1(conf-if-lo-0)#ip address 192.168.128.1/24
R1(conf-if-lo-0)#no shutdown
R1(conf-if-lo-0)#show config
!
interface Loopback 0
ip address 192.168.128.1/24
no shutdown
R1(conf-if-lo-0)#int gig 1/21
Border Gateway Protocol IPv4 (BGPv4) 252