Each method has its use cases in large networks, but the crucial factor is whether your AS is large or very large.

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Border Gateway Protocol (BGP) is crucial for managing large-scale networks. When dealing with internal BGP (iBGP) setups, network engineers can use BGP route reflectors for simpler, hub-and-spoke topologies, or BGP confederations for subdividing a network into more manageable sub-ASes. While route reflectors offer simplicity and reduced administrative overhead, they may introduce latency and scalability issues in extremely large networks. On the other hand, BGP confederations provide greater scalability and optimized routing but come with increased complexity. Choosing the right option depends on network size, scalability needs, and performance requirements.

BGP Confederations vs. BGP Route Reflectors and Which to Use

Understanding BGP Route Reflectors and BGP Confederations

Which Approach Is Better: BGP RR or BGP Confederation?