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Chapter 5. BGP Theory and Operation > Aggregation of Routing Information
Aggregation of Routing Information
BGP allows for the aggregation of routing information at any point in the network, whether across iBGP or eBGP connections. Normally, however, to maintain a consistent routing policy throughout an autonomous system, it is good design practice to aggregate only at eBGP connections.
Important points to consider when using BGP aggregation include the following:
