diff --git a/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.c b/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.c
index f199dc69309..f1ccb44db0f 100644
--- a/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.c
+++ b/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.c
@@ -32,7 +32,8 @@
 static void rteth_838x_create_tx_header(struct rteth_frag *frag, unsigned int port, int prio)
 {
 	/* cpu_tag[0] is reserved on the RTL83XX SoCs */
-	frag->cpu_tag[1] = 0x0400;  /* BIT 10: RTL8380_CPU_TAG */
+	frag->cpu_tag[1] = FIELD_PREP(RTETH_838X_TAG1_PROTO_MASK, RTETH_838X_TAG1_PROTO) |
+			   RTETH_838X_TAG1_BP_FLTR2;
 	frag->cpu_tag[2] = 0x0200;  /* Set only AS_DPM, to enable DPM settings below */
 	frag->cpu_tag[3] = 0x0000;
 	frag->cpu_tag[4] = BIT(port) >> 16;
diff --git a/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.h b/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.h
index c32b1075986..1026edcfd33 100644
--- a/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.h
+++ b/target/linux/realtek/files-6.18/drivers/net/ethernet/realtek/rtl838x_eth.h
@@ -27,6 +27,10 @@
 #define RTETH_838X_QM_PKT2CPU_INTPRI_CNT	3
 #define RTETH_838X_RMA_CTRL_0			(0x4300)
 #define RTETH_838X_RMA_CTRL_1			(0x4304)
+#define RTETH_838X_TAG1_PROTO_MASK		GENMASK(15, 8)
+#define RTETH_838X_TAG1_PROTO			0x04
+/* TX CPU tag: bypass the egress spanning-tree port state and egress VLAN filtering */
+#define RTETH_838X_TAG1_BP_FLTR2		BIT(4)
 
 #define RTETH_839X_CPU_PORT			52
 #define RTETH_839X_DMA_IF_CTRL			(0x786c)