With the rapid development of smart cars, the number of ADAS and a large number of sensors has increased, making smart cars usher in the transition stage from distributed to domain centralized, from more than 100 ECUs in the whole car to 5 DCUs, and the control functions are rapidly concentrated. In the domain-centralized automotive architecture design, the domain controller is in need of powerful computing power, ultra-high real-time performance, and a large number of communication peripherals. Therefore, a large number of high-speed transmission requirements have brought about changes in in-vehicle network communication, so some netizens believe that Ethernet will become the network backbone medium of the inter-domain controller network and be used to replace the existing serial networks (such as MOST and FlexRay), The future high-speed bus will be dominated by Ethernet.