A hybrid network communication method, wherein the method comprises: receiving, by a gateway device (80, 100), a first association request of a first multimode device through a first physical interface (801, 901, 1001, 1101), wherein the first association request comprises a Media Access Control, MAC, address of a second physical interface (802, 902, 1002, 1102), the first multimode device supports a first communication protocol and a second communication protocol, the first physical interface (801, 901, 1001, 1101) is a physical interface of the gateway device (80, 100), the second physical interface (802, 902, 1002, 1102) is a physical interface of the first multimode device, and a protocol type used by the first physical interface (801, 901, 1001, 1101) and the second physical interface (802, 902, 1002, 1102) is the first communication protocol; receiving, by the gateway device (80, 100), a second association request of the first multimode device through a third physical interface (803, 1003), wherein the second association request comprises a MAC address of a fourth physical interface, the third physical interface (803, 1003) is a physical interface of the gateway device (80, 100), the fourth physical interface is a physical interface of the first multimode device, and a protocol type used by the third physical interface (803, 1003) and the fourth physical interface is the second communication protocol; obtaining, by the gateway device (80, 100), an Internet Protocol version 6, IPv6, address of the first multimode device; and recording, by the gateway device (80, 100), a first correspondence and a second correspondence, wherein the first correspondence comprises a correspondence among the IPv6 address of the first multimode device, the MAC address of the second physical interface (802, 902, 1002, 1102), and the first physical interface (801, 901, 1001, 1101), and the second correspondence comprises a correspondence among the IPv6 address of the first multimode device, the MAC address of the fourth physical interface, and the third physical interface (803, 1003). receiving, by a gateway device (80, 100), a first association request of a first multimode device through a first physical interface (801, 901, 1001, 1101), wherein the first association request comprises a Media Access Control, MAC, address of a second physical interface (802, 902, 1002, 1102), the first multimode device supports a first communication protocol and a second communication protocol, the first physical interface (801, 901, 1001, 1101) is a physical interface of the gateway device (80, 100), the second physical interface (802, 902, 1002, 1102) is a physical interface of the first multimode device, and a protocol type used by the first physical interface (801, 901, 1001, 1101) and the second physical interface (802, 902, 1002, 1102) is the first communication protocol; receiving, by the gateway device (80, 100), a second association request of the first multimode device through a third physical interface (803, 1003), wherein the second association request comprises a MAC address of a fourth physical interface, the third physical interface (803, 1003) is a physical interface of the gateway device (80, 100), the fourth physical interface is a physical interface of the first multimode device, and a protocol type used by the third physical interface (803, 1003) and the fourth physical interface is the second communication protocol; obtaining, by the gateway device (80, 100), an Internet Protocol version 6, IPv6, address of the first multimode device; and recording, by the gateway device (80, 100), a first correspondence and a second correspondence, wherein the first correspondence comprises a correspondence among the IPv6 address of the first multimode device, the MAC address of the second physical interface (802, 902, 1002, 1102), and the first physical interface (801, 901, 1001, 1101), and the second correspondence comprises a correspondence among the IPv6 address of the first multimode device, the MAC address of the fourth physical interface, and the third physical interface (803, 1003).