I am trying to configure the zynq 7000 ethernet port for a loopback test. I have the interface configured so that it works. I then turn off Tx and RX, set the loopback bit, then enable tx & rx. I am following the guidance in ug585 TRM WRT bit 11 in net_cfg. I then transmit a message and then attempt to receive a message. No data is received. I think what I need is a full/complete description of the steps necessary to enable loopback.