Communication device, communication method, and program

A communication device comprising a processor configured to execute operations comprising:

• connecting to a plurality of communication devices configuring Multihoming for one customer network device via a communication network and does not configure the Multihoming;
• notifying each of the plurality of communication devices configuring the Multihoming of identifiers of the plurality of communication devices configuring the Multihoming and a Weight reference value according to a communication state of each of the plurality of communication devices configuring the Multihoming.

A communication method, comprising:

• creating a selection list, wherein the selection list includes an identifier of a communication device of a plurality of communication devices and a Weight reference value of the communication device of the plurality of communication devices, the plurality of communication devices the Multihoming based at least on the identifier of the communication device of the plurality of communication devices and the Weight reference value of the communication device of the plurality of communication devices according to a communication state of the communication device of the plurality of communication devices based on a notification received by the communication device from another device, and the Multihoming includes the plurality of communication devices connected to one customer network device and further connected to a communication network;
• and
• selecting, from the created selection list, a designated forwarder and a backup designated forwarder, wherein the designated forwarder forwards traffic to the customer network device, and the backup designated forwarder is to become a new designated forwarder when a failure occurs in the designated forwarder, based on a predetermined condition of the Weight reference value.

(canceled)