Gateway with improved QoS awareness

The present invention is related to a device and a method for exchanging data frames over a networking device. In particular, the device exchanges data between a WAN and one or more LAN segments in an optimized way leading to a better Quality of Experience for the end user. The networking device (1) comprises an interface (2) for exchanging data frames over an access network, at least a first and a second subnet interface (4,5) for exchanging data frames and arranged for being coupled to a network, a memory (6) for storing classification rules, a classification agent (7) coupled to the memory (6) and arranged for extracting information from an incoming data frame and for applying the classification rules to the extracted information in order to determine the interface via which said incoming data frame is to be forwarded, and a Quality of Service monitoring agent (9) being arranged for retrieving Quality of Service information from the subnet interfaces (4,5) and for dynamically updating at least one of the classification rules according to said QoS information.