Abstract: Computing device and method for transmitting a multicast command for synchronized media switch. The computing device generates a multicast IP packet comprising a command for switching from a first media stream to a second media stream. The command comprises synchronization information defining when to perform the switch. The computing device transmits the multicast IP packet comprising the switch command to a remote computing device receiving the first and second media streams. The synchronization information consists of a time or a given video frame at which the switch shall be performed. According to a particular aspect, the computing device is a transceiving unit (e.g. an SFP unit) comprising a housing adapted to being inserted into a chassis of a hosting unit. According to another particular aspect, the multicast IP packet is compliant with the SAP protocol and the command is compliant with the SDP format.