US Patent 11082298 Controller-based datacenter network bandwidth policy sharing

A method of allocating network bandwidth in a network that includes several tenant virtual machines (VMs). The method calculates a first bandwidth reservation for a flow between a source VM and a destination VM that are hosted on two different host machines. The source VM sends packets to a first set of VMs that includes the destination VM. The destination VM receives packets from a second set of VMs that includes the source VM. The method receives a second bandwidth reservation for the flow calculated at the destination. The method sets the bandwidth reservation for the flow as a minimum of the first and second bandwidth reservations.