BGP (Border Gateway Protocol) uses multipathing to provide redundancy and load balancing in case of multiple available paths between two routers. When multiple paths exist, BGP can distribute traffic across them based on the path’s cost or preference. Multipathing allows BGP to use all available paths simultaneously, providing faster data transfer rates and better network performance. Additionally, multipathing provides a backup in case one path fails, ensuring continuous network connectivity. BGP can also use multipathing to provide better load balancing when multiple peers are available. In this case, BGP selects the path with the lowest cost or preference, and distributes traffic across all available paths in that group. Overall, multipathing is a critical feature of BGP that helps to enhance network performance, reliability, and resilience.
