The described technology is generally directed towards overcoming a radio link interruption event, for example caused in the mmWave spectrum by a physical blockage between user equipment and a communications network distributed unit. Described is executing an inter-distributed unit beam switch in response to a radio link interruption trigger when no beams are available to support the user equipment from the distributed unit currently serving the user equipment. The inter-distributed unit beam switch may be performed by notifying a flow control process of the radio link interruption, which can switch to a different distributed unit such as selected by beam quality measurements.