RouteReflectors
Route Reflectors are a BGP mechanism used to scale iBGP in large networks. In a traditional iBGP mesh, every router must maintain a session with every other iBGP peer, which becomes impractical as the network grows. A route reflector design designates one or more routers as route reflectors and configures other routers as route reflector clients. The reflector learns routes from its clients (and from other reflectors) and reflects those routes to its clients, reducing the number of iBGP sessions needed while preserving route information and policy.
Key concepts include the route reflector itself, its clients, and the cluster concept. A cluster represents
Route Reflectors are widely used in service provider networks, large data centers, and enterprises to scale
Limitations and considerations include potential suboptimal routing if a reflector path is not the best available,