A method in a physical network controller (130) for configuring physical resources to provide a physical layer connection in a communication network (100). The physical layer connection provides physical connectivity to the upper layer network connection controlled by the upper layer network controller (120) in a hierarchical configuration with the physical network controller (130). The method includes a physical network controller (130) receiving (210) an indication of a minimum traffic capacity for a physical layer connection. The physical network controller sets a physical resource according to the received instruction (220). [Selection] Figure 2
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