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BGP Flap Definition: BGP flap is the continuous and rapid change in BGP route advertisement announcements due to frequent status updates, potentially causing network instability and performance issues.
BGP Flap refers to the repeated and rapid changes in the routing information carried by the Border Gateway Protocol (BGP) between two internet routers. This instability in the BGP routing tables can result from network issues, misconfigurations, or flapping routes between different paths, causing disruptions in the network's connectivity and performance.