The increasing cost of powering high performance networking infrastructure has led to the proposal of various energy saving schemes. The On/Off technique, being the most common energy saving scheme, consists of powering down partially or entirely a network infrastructure for energy saving purposes. Despite their capability to achieve great energy savings, On/Off networks experience high packet-loss rates due to the absence of reliability on packet delivery. Moreover, they cannot guarantee any response time to user applications. This paper presents the design and implementation of MFO2N; Experimental results show a correlation between offered quality of service and overall network power consumption, revealing that a trade-off should be made.