diff --git a/board/netconf/rootfs/lib/infix/cli-pretty b/board/netconf/rootfs/lib/infix/cli-pretty
index 84b6f15c..5804b1c0 100755
--- a/board/netconf/rootfs/lib/infix/cli-pretty
+++ b/board/netconf/rootfs/lib/infix/cli-pretty
@@ -50,6 +50,7 @@ class Iface:
         self.oper_status = data.get('oper-status', '')
         self.autoneg = self.get_json_data('unknown', 'ieee802-ethernet-interface:ethernet',
                                           'auto-negotiation', 'enable')
+        self.duplex = self.get_json_data('', 'ieee802-ethernet-interface:ethernet', 'duplex')
         self.phys_address = data.get('phys-address', '')
 
         if data.get('statistics'):
@@ -189,6 +190,9 @@ class Iface:
             val = "on" if self.autoneg else "off"
             print(f"{'auto-negotiation':<{20}}: {val}")
 
+        if self.duplex:
+            print(f"{'duplex':<{20}}: {self.duplex}")
+
         if self.phys_address:
             print(f"{'physical address':<{20}}: {self.phys_address}")
 
diff --git a/board/netconf/rootfs/lib/infix/yanger b/board/netconf/rootfs/lib/infix/yanger
index d80fc7b3..ac32547b 100755
--- a/board/netconf/rootfs/lib/infix/yanger
+++ b/board/netconf/rootfs/lib/infix/yanger
@@ -307,6 +307,14 @@ def add_ethtool_std(ifname, iface_out):
         else:
             insert(iface_out, "ieee802-ethernet-interface:ethernet", "auto-negotiation", "enable", False)
 
+    if "Duplex" in result:
+        if result['Duplex'] == "Half":
+            insert(iface_out, "ieee802-ethernet-interface:ethernet", "duplex", "half")
+        elif result['Duplex'] == "Full":
+            insert(iface_out, "ieee802-ethernet-interface:ethernet", "duplex", "full")
+        else:
+            insert(iface_out, "ieee802-ethernet-interface:ethernet", "duplex", "unknown")
+
 if __name__ == "__main__":
     yang_data = {
         "ietf-interfaces:interfaces": {