The PCB I designed is 6-layer. I will create a chassis ground in the form of a frame surrounding the mounting holes and add a Y capacitor between and to the signal GND. And I will surround this chassis ground and adding stitching vias on the entire layer of the PCB.
The part that stuck in my head is that the circular connectors in the middle do not contact the PCB. Ethernet signals from circular connectors first go to an ethernet isolation transformer and then go to the other connector. For the Ethernet isolation transformer midpoint, I need to make a Bob Smith ground to the chassis. However, I cannot do this from the middle connectors.This type of connector is mechanically connected to the chassis from the body but has no connection with the pcb. If I bring the chassis ground around the edges of the PCB to the middle point where it is the ethernet transformer, should I add all the lower layers to the chassis ground? Or do you have another suggestion? Another aspect of the job is that the other signals will pass through the lower layers.