Cognitive Radio Networks are being developed to provide high speed and spectrum efficient wireless access for mobile users. These networks integrate multi hop access in combination with concurrent use of multiple wireless access interfaces. For efficient use of radio resources route decisions in Cognitive Radio Networks are based on wireless interface and link status information which need to be monitored at each single wireless interface separately. We have designed and implemented a Wireless Monitor which monitors multiple wireless interfaces simultaneously. The Wireless Monitor measures 7 wireless parameters which are combined for link status detection inside an interface status monitor. In this paper we report wireless monitor results which have been obtained when multiple Wi-Fi interfaces are bonded showing the effectiveness of the monitored parameters for interface and link status detection in Cognitive Radio Networks.