Method for repairing data frame routes that comprises: - receiving, through a network bridge (P n) port wherein said port has an assigned port identity, a frame (t n) comprising a source MAC address and a destination MAC address; - associating, in a recording unit, the source MAC address of the received frame to the port identity of the bridge (P n) that received the frame (t n) in the first place, with an expiration indicator of the frame and the arrival time of the frame; - deleting, in the recording unit, the associations that a port of bridge (P n) may have when a line failure is detected in said port or when the address validity timer expires; when the received frame (t n) does not have its destination MAC address associated to any port in the recording unit of the bridge (P n) and there is a port, in the recording unit of the bridge (P n) receiving the frame, which is associated to the source MAC address of the received frame, the method further comprises: - routing without modification, the frames (t n) whose source MAC address is associated with the port through which they are received, towards the port associated with said source MAC address; - rejecting the subsequent unicast frames (t n) received whose destination MAC address is listed in log of addresses being repaired. - setting a guard time that blocks the modification of the source MAC address-input port association and the creation of new associations of said MAC address to other ports of the same bridge, characterized in that if the guard time has elapsed without having received a repairing frame through the port associated with the source MAC address and the route repairing frame arrives through a port different to the one associated with the source MAC address of the frame (t n), the port through which the frame (t n) has been received is associated to the source MAC address being repaired. - receiving, through a network bridge (P n) port wherein said port has an assigned port identity, a frame (t n) comprising a source MAC address and a destination MAC address; - associating, in a recording unit, the source MAC address of the received frame to the port identity of the bridge (P n) that received the frame (t n) in the first place, with an expiration indicator of the frame and the arrival time of the frame; - deleting, in the recording unit, the associations that a port of bridge (P n) may have when a line failure is detected in said port or when the address validity timer expires; when the received frame (t n) does not have its destination MAC address associated to any port in the recording unit of the bridge (P n) and there is a port, in the recording unit of the bridge (P n) receiving the frame, which is associated to the source MAC address of the received frame, the method further comprises: - routing without modification, the frames (t n) whose source MAC address is associated with the port through which they are received, towards the port associated with said source MAC address; - rejecting the subsequent unicast frames (t n) received whose destination MAC address is listed in log of addresses being repaired. - setting a guard time that blocks the modification of the source MAC address-input port association and the creation of new associations of said MAC address to other ports of the same bridge, characterized in that if the guard time has elapsed without having received a repairing frame through the port associated with the source MAC address and the route repairing frame arrives through a port different to the one associated with the source MAC address of the frame (t n), the port through which the frame (t n) has been received is associated to the source MAC address being repaired.