BGP and Cloud Routing.

Updated Apr 28, 2026

Short answer

BGP (Border Gateway Protocol) is the routing protocol of the internet, exchanging routing and reachability information.

Deep explanation

In cloud environments, BGP is heavily used in Direct Connect, ExpressRoute, and dynamic VPN routing. When a new subnet is created in an AWS VPC, BGP automatically advertises the new route to the on-premises corporate router, eliminating manual static route management.

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