The embodiments herein relate to a method and a system for switch data frames in a network comprising a plurality of switch devices. The method comprising: assigning to each switch device, a SW-ID, exchanging SW-IDs between switch devices; building a routing table, for each switch device; receiving a frame at a switch device. If the frame is a broadcast frame, generating separate copies of the frame; modifying a destination MAC address of each generated copy of the frame by including in the destination MAC address an indicator value; and further including the SW-ID of a corresponding switch device and based on the routing table and the cost indicating in the routing table, transmitting or forwarding each modified frame towards the switch device having the SW-ID indicated in the frame.