In an Ethernet network divided into multiple domains, a method for Ethernet data frame data learning includes: receiving through a bridge port of a domain of the Ethernet network an Ethernet data frame containing a source Media Access Control (MAC) address; and generating a forwarding matching entry including a destination MAC address, the length of a forwarding mask and a bridge egress-port identifier; wherein the destination MAC address is acquired by matching the source MAC address with the length of the forwarding mask. In a method for Ethernet data frame forwarding, a bridge forwards the Ethernet data frame according to a MAC forwarding matching table including a destination MAC address, the length of a forwarding mask and a bridge egress-port identifier. An Ethernet network and a bridge are also provided. The number of entries included in the MAC forwarding matching table o is reduced effectively.