12/24/2022 0 Comments Reflector 2 tutorial![]() ![]() Using one more RR prevent one node failure effects and provide a redundant BGP topology.ĭifferent RRs can belong to the same Cluster or to different Clusters. Especially for redundancy purpose, two Route Reflectors are used in large networks. But there can be one more RRs in a BGP Topology. In simple BGP designs there can be one Route Reflector. Non clients are the routers that is not located in this Cluster. ![]() RR Server and RR Clients are together form a “ Cluster”. Route Reflectors are Hubs and RR Clients are Spokes here. This mechanism is also a Hub and Spoke toplogy. Without fullmesh, all iBGP Routers learn all BGP Routes. These RR Clients send updates to RR Server and the full mesh requirement is bypassed. With Route Reflector mechanism, the Router that will be a Route Reflector (RR) become RR Server and the other iBGP neighbors are configured as RR Clients on this RR Server. There are three different Router roles in Route Reflector mechanism of BGP. ![]() Route Reflector Operation BGP Route Reflector Router Roles One router is selected as RR and the other routers are connected and send updates to RR Router only. In this BGP Topology, without Route Reflector mechanism, all the iBGP Neigbors need to be connected together as full mesh.īy using a Route Reflector, this Full mesh requirement is bypassed. You can test you BGP Knowledge on BGP Questions Page. So, the iBGP connections in a BGP topology is reduced. Here, full mesh requirement is bypassed, all iBGP peers do not need to be connected eachother. BGP Route Reflectors are connected to all iBGP Peers and they learn the BGP routes form iBGP Peers, then they send this routes to orther iBGP Peers. All the BGP Route Reflectors are Server and the other iBGP peers are Client in this topology. This is important especially for large networks.īGP Route Reflector (RR) system is a Client/Server System. With this mechanism less bandwith and CPU usage is provided in BGP Topology. BGP Route Reflector (RR) is a BGP Mechanism used to bypass this iBGP Full Mesh requirement and provide all iBGP Routing information to all iBGP peers.
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