diff --git a/sys/dev/pci/ixgbe/ixgbe.c b/sys/dev/pci/ixgbe/ixgbe.c
index aacbb7e636c1..1105db9c10b1 100644
--- a/sys/dev/pci/ixgbe/ixgbe.c
+++ b/sys/dev/pci/ixgbe/ixgbe.c
@@ -1,4 +1,4 @@
-/* $NetBSD: ixgbe.c,v 1.333 2023/10/06 14:37:04 msaitoh Exp $ */
+/* $NetBSD: ixgbe.c,v 1.334 2023/10/06 14:40:06 msaitoh Exp $ */
 
 /******************************************************************************
 
@@ -64,7 +64,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ixgbe.c,v 1.333 2023/10/06 14:37:04 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ixgbe.c,v 1.334 2023/10/06 14:40:06 msaitoh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -117,6 +117,7 @@ static const ixgbe_vendor_info_t ixgbe_vendor_info_array[] =
 	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_XAUI_LOM, 0, 0, 0},
 	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_CX4, 0, 0, 0},
 	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_T3_LOM, 0, 0, 0},
+	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_LS, 0, 0, 0},
 	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_COMBO_BACKPLANE, 0, 0, 0},
 	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_BACKPLANE_FCOE, 0, 0, 0},
 	{IXGBE_INTEL_VENDOR_ID, IXGBE_DEV_ID_82599_SFP_SF2, 0, 0, 0},
diff --git a/sys/dev/pci/ixgbe/ixgbe_82599.c b/sys/dev/pci/ixgbe/ixgbe_82599.c
index 4b38e505e1f1..8f737b358e60 100644
--- a/sys/dev/pci/ixgbe/ixgbe_82599.c
+++ b/sys/dev/pci/ixgbe/ixgbe_82599.c
@@ -1,4 +1,4 @@
-/* $NetBSD: ixgbe_82599.c,v 1.30 2023/10/04 04:31:25 msaitoh Exp $ */
+/* $NetBSD: ixgbe_82599.c,v 1.31 2023/10/06 14:40:06 msaitoh Exp $ */
 
 /******************************************************************************
   SPDX-License-Identifier: BSD-3-Clause
@@ -36,7 +36,7 @@
 /*$FreeBSD: head/sys/dev/ixgbe/ixgbe_82599.c 331224 2018-03-19 20:55:05Z erj $*/
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ixgbe_82599.c,v 1.30 2023/10/04 04:31:25 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ixgbe_82599.c,v 1.31 2023/10/06 14:40:06 msaitoh Exp $");
 
 #include "ixgbe_type.h"
 #include "ixgbe_82599.h"
@@ -571,6 +571,9 @@ enum ixgbe_media_type ixgbe_get_media_type_82599(struct ixgbe_hw *hw)
 	case IXGBE_DEV_ID_82599_T3_LOM:
 		media_type = ixgbe_media_type_copper;
 		break;
+	case IXGBE_DEV_ID_82599_LS:
+		media_type = ixgbe_media_type_fiber_lco;
+		break;
 	case IXGBE_DEV_ID_82599_QSFP_SF_QP:
 		media_type = ixgbe_media_type_fiber_qsfp;
 		break;
diff --git a/sys/dev/pci/ixgbe/ixgbe_type.h b/sys/dev/pci/ixgbe/ixgbe_type.h
index fdc1957e081e..f8fa959aff69 100644
--- a/sys/dev/pci/ixgbe/ixgbe_type.h
+++ b/sys/dev/pci/ixgbe/ixgbe_type.h
@@ -1,4 +1,4 @@
-/* $NetBSD: ixgbe_type.h,v 1.58 2023/10/06 14:37:04 msaitoh Exp $ */
+/* $NetBSD: ixgbe_type.h,v 1.59 2023/10/06 14:40:06 msaitoh Exp $ */
 
 /******************************************************************************
   SPDX-License-Identifier: BSD-3-Clause
@@ -108,6 +108,7 @@
 #define IXGBE_DEV_ID_82599_KR			0x1517
 #define IXGBE_DEV_ID_82599_COMBO_BACKPLANE	PCI_PRODUCT_INTEL_82599_COMBO_BACKPLANE
 #define IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ	0x000C
+#define IXGBE_DEV_ID_82599_LS			0x154F
 #define IXGBE_DEV_ID_82599_CX4			PCI_PRODUCT_INTEL_82599_CX4
 #define IXGBE_DEV_ID_82599_SFP			PCI_PRODUCT_INTEL_82599_SFP
 #define IXGBE_SUBDEV_ID_82599_SFP_WOL0		0x1071
@@ -3796,6 +3797,7 @@ enum ixgbe_media_type {
 	ixgbe_media_type_fiber,
 	ixgbe_media_type_fiber_fixed,
 	ixgbe_media_type_fiber_qsfp,
+	ixgbe_media_type_fiber_lco,
 	ixgbe_media_type_copper,
 	ixgbe_media_type_backplane,
 	ixgbe_media_type_cx4,