Open fronthaul network system

An open fronthaul network system comprising:

• a plurality of remote radio head (RRH) devices configured to transmit and receive data of a wireless terminal;
• a radio access network (RAN) device configured to transmit and receive the data of the wireless terminal to allocate a MAC address to a frame;
• a plurality of optical line terminals (OLTs);
• a mobile communication core network;
• and
• an open fronthaul device connected to the mobile communication core network,
• wherein the open fronthaul device includes:
• a software defined network (SDN) controller including a plurality of openflow edge switches connected to the RRH device via Ethernet, connected to the RAN device via the Ethernet, or connected to the OLT via a passive optical network (PON),in which the openflow edge switches are configured to acquire information of the openflow edge switches belonging to a switch group;
• and
• a legacy routing container configured to treat a switch group including at least some switches among the switches as a virtual router to generate routing information for a packet introduced into any one switch of the switch group, and
• the legacy routing container is configured to map a plurality of network devices, which are connected to the openflow switches configured to generate legacy routing information for a flow processing inquiry message of the controller based on information of at least one virtual router, with information of an external network that is directly connected to the virtual router.