diff --git a/libraries/technology/eth_10g/tech_eth_10g.vhd b/libraries/technology/eth_10g/tech_eth_10g.vhd
index f2037baea1eba75d1b831865ccf0a6688dc2a91b..6ffed7b0a82c3bb9da46471a609a84529025b028 100644
--- a/libraries/technology/eth_10g/tech_eth_10g.vhd
+++ b/libraries/technology/eth_10g/tech_eth_10g.vhd
@@ -50,6 +50,7 @@ ENTITY tech_eth_10g IS
   GENERIC (
     g_technology          : NATURAL := c_tech_select_default;
     g_sim                 : BOOLEAN := FALSE;
+    g_sim_level           : NATURAL := 0;     -- 0 = use IP; 1 = use fast serdes model
     g_nof_channels        : NATURAL := 1;
     g_link_status_check   : STD_LOGIC_VECTOR(c_tech_mac_10g_link_status_w-1 DOWNTO 0) := "11";
     g_pre_header_padding  : BOOLEAN := FALSE
@@ -58,6 +59,7 @@ ENTITY tech_eth_10g IS
     -- Transceiver PLL reference clock
     tr_ref_clk_644   : IN  STD_LOGIC := '0';   -- 644.531250 MHz for 10GBASE-R
     tr_ref_clk_156   : IN  STD_LOGIC := '0';   -- 156.25     MHz for XAUI
+    tr_ref_rst_156   : IN  STD_LOGIC := '0';   --                for XAUI
     
     -- Calibration & reconfig clock
     cal_rec_clk      : IN  STD_LOGIC := '0';   -- for XAUI;
@@ -111,6 +113,7 @@ BEGIN
     u0 : ENTITY work.tech_eth_10g_stratixiv
     GENERIC MAP (
       g_sim                 => g_sim,
+      g_sim_level           => g_sim_level,
       g_nof_channels        => g_nof_channels,
       g_link_status_check   => g_link_status_check,
       g_pre_header_padding  => g_pre_header_padding
@@ -118,6 +121,7 @@ BEGIN
     PORT MAP (
       -- Transceiver PLL reference clock
       tr_ref_clk_156   => tr_ref_clk_156,
+      tr_ref_rst_156   => tr_ref_rst_156,
       
       -- Calibration & reconfig clock
       cal_rec_clk      => cal_rec_clk,
@@ -156,6 +160,7 @@ BEGIN
     u0 : ENTITY work.tech_eth_10g_arria10
     GENERIC MAP (
       g_sim                 => g_sim,
+      g_sim_level           => g_sim_level,
       g_nof_channels        => g_nof_channels,
       g_link_status_check   => g_link_status_check,
       g_pre_header_padding  => g_pre_header_padding