Initiating a session over a High Definition Base T (HDBaseT) network. This may involve receiving a message requesting an initiation of a session from an initiation apparatus over an Ethernet network; and transmitting, a response message in response to the request message to the initiation apparatus over the Ethernet network. The request message may include a first source entity reference field for identifying the initiation apparatus and a first destination entity reference field for identifying the session partner, the first source entity reference field includes a Medium Access Control (MAC) address for identifying a management entity contained in the initiation apparatus and a HDBaseT group port identifier (TPG ID) for identifying a port of the initiation apparatus, and the first destination entity reference field includes a Medium Access Control (MAC) address for identifying a management entity contained in the session partner and a HDBaseT group port identifier (TPG ID) for identifying a port of the session partner.