<div dir="ltr"><p style="box-sizing:border-box;margin:0px 0px 8px;color:rgb(38,38,38);font-family:intel-clear;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="box-sizing:border-box">Hi,</span></p><p style="box-sizing:border-box;margin:0px 0px 8px;color:rgb(38,38,38);font-family:intel-clear;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"><span style="box-sizing:border-box">I
 am trying to establish a uni-directional Ethernet link where a singular
 fiber is used to transmit data to the receiver in the DPDK environment. The Rx of the transmit side and the Tx of the 
receive side are not physically connected, like in a Data diode 
scenario. The ethernet controller on both sides is intel 82580.<br></span></p><p style="box-sizing:border-box;margin:0px 0px 8px;color:rgb(38,38,38);font-family:intel-clear;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"> my problem is that when I detach the RX line from one side, both sides' links go down. <br></p><p style="box-sizing:border-box;margin:0px 0px 8px;color:rgb(38,38,38);font-family:intel-clear;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"> Could anyone please give me some advice to solve this problem and establish a valid unidirectional ethernet link?</p></div>