Understanding the BGP Route Reflector Rules
BGP Route Reflectors (RR) simplify IBGP by reflecting routes between peers, reducing the need for a full-mesh setup. Here’s how it works:
➤ Rule 1: If a RR receives a route from a non-RR client, it reflects it only to other RR clients, not non-RR clients.
➤ Rule 2: If a RR receives a route from an RR client, it reflects it to both RR and non-RR clients. The originating RR client also receives the route but discards it.
➤ Rule 3: If a RR receives a route from an EBGP peer, it reflects it to both RR and non-RR clients.
These rules allow Route Reflectors to improve BGP scalability by reducing the number of IBGP peerings and simplifying route distribution.
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