  We study the symmetric degrees-of-freedom (DoF) of partially connected
interference networks under linear coding strategies at transmitters without
channel state information beyond topology. We assume that the receivers are
equipped with reconfigurable antennas that can switch among their preset modes.
In such a network setting, we characterize the class of network topologies in
which half linear symmetric DoF is achievable. Moreover, we derive a general
upper bound on the linear symmetric DoF for arbitrary network topologies. We
also show that this upper bound is tight if the transmitters have at most two
co-interferers.
