0 ENABLING BGP ROUTINGHERE ARE THE STEPS NEEDED TO ENABLE AND CONFIG...

BGP4 Case Studies/Tutorial

Here are the steps needed to enable and configure BGP.

Let us assume you want to have two routers RTA and RTB talk BGP. In the

first example RTA and RTB are in different autonomous systems and in the

second example both routers belong to the same AS.

We start by defining the router process and define the AS number that the

routers belong to:

The command used to enable BGP on a router is:

router bgp

autonomous-system

RTA#

router bgp 100

RTB#

router bgp 200

The above statements indicate that RTA is running BGP and it belongs to

AS100 and RTB is running BGP and it belongs to AS200 and so on.

The next step in the configuration process is to define BGP neighbors.

The neighbor definition indicates which routers we are trying to talk to

with BGP.

The next section will introduce you to what is involved in forming a

valid peer connection.