Due to its characteristics of long transmitting distance and high speed, SpaceFibre is widely used in aerospace applications, and its plug-and-play technology (SpFi-PnP) facilitates the on-board management of on-board devices and enables the measurement and control of on-board networks. In large-scale space-borne bus network, width traversal algorithm was applied to search the network devices, and the network manager of SpaceFibre was designed to realize plug and play of the bus network in real time. Experiments show that the network manager can detect the equipments and monitor the real-time information of the node device in the router network. OPNET modeling analysis was made on the end-to-end delay of the SpaceFibre optic network, so as to evaluate the performance of the network using width traversal algorithm. Data streams were sent using the whole packet and sub-packet mechanism at the source node module. The results show that the sub-packet mechanism works better, and the best network delay realizes when the number of packet group is 10.