A hybrid network communication method is disclosed. A gateway device receives a first association request of a multimode device through a first physical interface, where the first association request includes a MAC address of a second physical interface of the multimode device. The gateway device receives a second association request of the multimode device through a third physical interface, where the second association request includes a MAC address of a fourth physical interface of the multimode device. The gateway device obtains an IPv6 address of the multimode device, and records a first correspondence and a second correspondence. The first correspondence includes the IPv6 address of the multimode device, the MAC address of the second physical interface, and the first physical interface. The second correspondence includes the IPv6 address of the multimode device, the MAC address of the fourth physical interface, and the third physical interface.