  This paper proposes a passive optical backplane as a new network topology for
composable computing infrastructures. The topology provides a high capacity,
low-latency and flexible fabric that interconnects disaggregated resource
components. The network topology is dedicated to inter-resource communication
between composed logical hosts to ensure effective performance. We formulated a
mixed integer linear programming (MILP) model that dynamically creates logical
networks to support intra logical host communication over the physical network
topology. The MILP performs energy efficient logical network instantiation
given each application resource demand. The topology can achieve 1Tbps capacity
per resource node given appropriate wavelength transmission data rate and the
right number of wavelengths per node.
