Surveys in ISP and telecommunication companies around the world showed that power consumption of network significantly elevated over the years. Furthermore, studies indicated that major contributors to the power consumption of network are the power consumed by routers and switch during the runtime. Therefore, minimizing the power consumption of these network equipments is becoming an issue of increasing importance in the field of green network. To minimize the power consumption of the network, it is important to identify the relationship between network parameters and their effect on power consumption of the network equipments. The objective of this paper is to propose a method, based on fuzzy logic, to identify this relationship and use it to predict/ estimate the saving of power consumption when deploying new network equipments. Moreover, it can also be developed as a strategy to control the desired level of power consumption by tuning the network parameters. This study only focuses on impact of four network parameters, which are bandwidth, number of connections, traffic-load, and hibernation-mode, to the power consumption of an Ethernet switch. A test bed of extensive experimentations is implemented in order to measure the data to cover all possible combination of scenarios.