Index: /src/router/services/sysinit/sysinit-wrt54g2v11.c
===================================================================
--- /src/router/services/sysinit/sysinit-wrt54g2v11.c (revision 12224)
+++ /src/router/services/sysinit/sysinit-wrt54g2v11.c (revision 12401)
@@ -198,4 +198,19 @@
 void enable_dtag_vlan(int enable)
 {
-
-}
+    if (enable) {
+	system("swconfig dev eth0 set reset 1");
+	system("swconfig dev eth0 set vlan 1");
+	system("swconfig dev eth0 vlan 1 set ports \"0t 2 3 4 5\"");
+	system("swconfig dev eth0 vlan 7 set ports \"0t 1t\"");
+	system("swconfig dev eth0 vlan 8 set ports \"0t 1t\"");
+	system("swconfig dev eth0 set apply");
+    }else{
+	system("swconfig dev eth0 set reset 1");
+	system("swconfig dev eth0 set vlan 1");
+	system("swconfig dev eth0 vlan 1 set ports \"0t 2 3 4 5\"");
+	system("swconfig dev eth0 vlan 2 set ports \"0t 1\"");
+	system("swconfig dev eth0 set apply");
+    
+    }
+
+}