Configuring Route Reflection for iBGP

Configuring Route Reflection for iBGP
In this section, you will learn to configure basic route reflection. After that, we will turn our
focus to multiple route reflectors within a single cluster.
Basic route reflection configuration is pretty simple. You need to decide what device will
be the route reflector, and then you need to set up the iBGP connections appropriately. The
configuration for setting up route reflection occurs on the route reflector. The client needs no
special configuration, nor does it realize anything different is taking place, nor does it behave
any differently. The following additional command is the only command that is needed to
configure a route reflector:
neighbor
peer-address
route-reflector-client
peer-address
- the IP address of the BGP speaker you want to peer with.
The
neighbor
peer
_
address
route-reflector-client
command needs to be entered for
each peer that you want to become a client of this route reflector and receive other iBGP originated
routes.
Let’s implement what we have just learned. Refer to Figure 9.3.
We will use R1 as the route reflector, and the client peers will be R2, R3, and R4. When configuring
iBGP, use the loopback interface address of each device for the BGP session and turn
off synchronization. The loopback interface information is as follows:
R1 Lo0-1.1.1.1
R2 Lo0-2.2.2.2
R3 Lo0-3.3.3.3
R4 Lo0-4.4.4.4