Administrator Guide

Sample Congurations
The following example congurations show how to enable BGP and set up some peer groups. These examples are not comprehensive
directions. They are intended to give you some guidance with typical congurations.
To support your own IP addresses, interfaces, names, and so on, you can copy and paste from these examples to your CLI. Be sure that you
make the necessary changes.
The following illustration shows the congurations described on the following examples. These congurations 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 Congurations
Example of Enabling BGP (Router 1)
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 te 1/21
R1(conf-if-te-1/21)#ip address 10.0.1.21/24
R1(conf-if-te-1/21)#no shutdown
R1(conf-if-te-1/21)#show config
!
interface TengigabitEthernet 1/21
Border Gateway Protocol IPv4 (BGPv4)
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