Communication device, communication system, communication method, and non-transitory computer readable medium storing communication program

A communication system comprising:

• first and second communication devices;
• and
• first and second wireless LAN access points connected to the second communication device,
• wherein the first communication device includes:
• a first wireless LAN interface configured to wirelessly communicate with the first wireless LAN access point;
• a second wireless LAN interface configured to wirelessly communicate with the second wireless LAN access point;
• an encapsulation unit configured to encapsulate, in accordance with a specified encapsulation protocol, a transmission frame to be transmitted to the second communication device via Layer 2 tunneling;
• and
• a redundancy unit configured to generate a first encapsulated frame where a MAC address of the first wireless LAN interface is set to a source MAC address and a second encapsulated frame where a MAC address of the second wireless LAN interface is set to a source MAC address by using the encapsulated transmission frame,
• the first wireless LAN interface wirelessly transmits the generated first encapsulated frame to the first wireless LAN access point, and
• the second wireless LAN interface wirelessly transmits the generated second encapsulated frame to the second wireless LAN access point.

A communication method comprising:

• encapsulating, in accordance with a specified encapsulation protocol, a transmission frame to be transmitted to a communication device at other side via Layer 2 tunneling;
• generating a first encapsulated frame where a MAC address of a first wireless LAN interface is set to a source MAC address and a second encapsulated frame where a MAC address of a second wireless LAN interface is set to a source MAC address by using the encapsulated transmission frame, the first wireless LAN interface being configured to wirelessly communicate with a first wireless LAN access point, and the second wireless LAN interface being configured to wirelessly communicate with a second wireless LAN access point;
• wirelessly transmitting the generated first encapsulated frame from the first wireless LAN interface to the first wireless LAN access point;
• and
• wirelessly transmitting the generated second encapsulated frame from the second wireless LAN interface to the second wireless LAN access point.

A non-transitory computer readable medium storing a communication program causing a computer to execute a process comprising:

• encapsulating, in accordance with a specified encapsulation protocol, a transmission frame to be transmitted to a communication device at other side via Layer 2 tunneling;
• generating a first encapsulated frame where a MAC address of a first wireless LAN interface is set to a source MAC address and a second encapsulated frame where a MAC address of a second wireless LAN interface is set to a source MAC address by using the encapsulated transmission frame, the first wireless LAN interface being configured to wirelessly communicate with a first wireless LAN access point, and the second wireless LAN interface being configured to wirelessly communicate with a second wireless LAN access point;
• wirelessly transmitting the generated first encapsulated frame from the first wireless LAN interface to the first wireless LAN access point;
• and
• wirelessly transmitting the generated second encapsulated frame from the second wireless LAN interface to the second wireless LAN access point.

A communication device comprising:

• a receiving unit configured to receive a first encapsulated frame from a communication device at other side through a first wireless LAN access point connected by wire and receive a second encapsulated frame from the communication device at other side through a second wireless LAN access point connected by wire;
• a redundancy unit configured to select any one of the first encapsulated frame and the second encapsulated frame;
• and
• a decapsulation unit configured to decapsulate the selected encapsulated frame in accordance with a specified encapsulation protocol.