A communication relay apparatus includes a plurality of LAN ports configured to receive LAN cables respectively, at least one switch configured to switch to any one of a plurality of states, and an aggregator configured to specify a combination of two or more of the plurality of LAN ports in accordance with a state that is designated in the at least one switch, and conduct redundancy or expansion of a communication bandwidth with respect to a communication performed through the LAN cables that are received in the specified LAN ports.