My design requires Ethernet TX/RX differential signals to be routed from Ethernet magnetics to VPX backplane connectors P1 & P2. As per Ethernet PCB design requirements the module signal ground should be isolated from Chassis ground of Ethernet signals. I am able to isolate the two ground planes upto the backplane connector. The requirement is that Ethernet signals on secondary side of magnetics should have chassis ground as reference and should never overlap with any other signal traces/ground planes. Since backplane connectors have signal ground pins to be connected the overlap between Ethernet signals and signal ground will happen. Which means the isolation is lost. What can be the solution for this issue?