Routers that have a BGP session to Route Reflector is called as BGP Route Reflector Client. RR simplifies the logical topology of the network, reduces the total number of BGP sessions in the network, and reduces the configuration of the BGP routers.Īs you can see in the above topology, BGP Route Reflector is a central node which all the other BGP routers in the network build an IBGP neighborship with. As you can see, from each router, there is a BGP connection to each and every other BGP router inside the network. The above topology shows IBGP Full Mesh design. The requirement with IBGP, every BGP router needs to have a BGP neighborship with all the other BGP routers in one particular BGP Autonomous System. Route Reflector is not a special device, it is a regular router, which can run any routing protocol, it can be a physical or virtual router that needs to have BGP code, that's all.īGP Route Reflector is an alternative to BGP full mesh. In IBGP, BGP neighborship is created between the routers which have the same BGP Autonomous System number.īGP Route Reflector as I said above, is only used in IBGP. In EBGP, BGP neighborship is created between two routers that have different BGP Autonomous System numbers. Let's extend the definition a bit.īGP Route Reflector is only used in IBGP. It offers an alternative to the logical full-mesh requirement of the internal border gateway protocol (IBGP).Ībove is the Wikipedia definition of a BGP Route Reflector. What is BGP Route Reflector?Ī BGP route reflector (RR) is a network routing component for BGP. I am explaining this topic in deep detail in my CCIE Enterprise Infrastructure Training and also my specialized BGP Zero to Hero course. In this post, I will explain to you the BGP Route Reflector basics, after you read this post, you will be able to answer any questions regarding BGP Route Reflectors.
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