This article will show you how to record the in-vehicle Ethernet communication between two devices (e.g. ECU) as shown in the wiring diagram below.The link between DUT_1 and DUT_2 must be split into two segments and reconnected via the Media Gateway.The middle RJ-45 port is used to record the communication between the two DUTs (e.g. ECU). The middle RJ-45 port is used to record the communication between the two DUTs, and the leftmost RJ-45 port is used to configure the Media Gateway. follow the 19 steps to complete the configuration in one step.