Hybrid network communication method, device, and system

A hybrid network communication method, the method comprising:

• receiving, by a multimode device supporting a first communication protocol and a second communication protocol, a first notification from a gateway device through a first physical interface, the first notification comprising a MAC address of a second physical interface, the first physical interface is a physical interface of the multimode device, the second physical interface is a physical interface of the gateway device, and a protocol type used by the first physical interface and the second physical interface is the first communication protocol;
• receiving, by the multimode device, a second notification from the gateway device through a third physical interface, the second notification comprising a MAC address of a fourth physical interface, the third physical interface being a physical interface of the multimode device, the fourth physical interface being a physical interface of the gateway device, and a protocol type used by the third physical interface and the fourth physical interface comprising the second communication protocol;
• recording, by the multimode device, a first default gateway correspondence and a second default gateway correspondence, the first default gateway correspondence comprising a correspondence among a default IP address, the MAC address of the second physical interface, and the first physical interface;
• and the second default gateway correspondence comprising a correspondence among the default IP address, the MAC address of the fourth physical interface, and the third physical interface;
• and
• when sending a first packet, setting, by the multimode device, a destination MAC address of the first packet to the MAC address of the second physical interface based on the first default gateway correspondence to obtain a second packet, and sending the second packet through the first physical interface;
• or setting, by the multimode device, a destination MAC address of the first packet to the MAC address of the fourth physical interface based on the second default gateway correspondence to obtain a third packet, and sending the third packet through the third physical interface.

A gateway device used in a hybrid network, the gateway device comprising:

• a first physical interface, the first physical interface using a first communication protocol;
• and
• a second physical interface, the second physical interface using a second communication protocol;
• and
• the gateway device being configured to:
• receive a first association request of a multimode device through the first physical interface, the first association request comprising a MAC address of a third physical interface, the multimode device supports the first communication protocol and the second communication protocol, the third physical interface is a physical interface of the multimode device, and a protocol type used by the third physical interface is the first communication protocol;
• receive a second association request of the multimode device through the second physical interface, the second association request comprising a MAC address of a fourth physical interface, the fourth physical interface is a physical interface of the multimode device, and a protocol type used by the fourth physical interface is the second communication protocol;
• obtain an Internet Protocol version 6 (IPv6) address of the multimode device;
• and
• record a first correspondence and a second correspondence, the first correspondence comprising a correspondence among the IPv6 address of the multimode device, the MAC address of the third physical interface, and the first physical interface, and the second correspondence comprises a correspondence among the IPv6 address of the multimode device, the MAC address of the fourth physical interface, and the second physical interface.