diff --git a/etc/vswitch.conf b/etc/vswitch.conf
index ead8aab..e596a6e 100644
--- a/etc/vswitch.conf
+++ b/etc/vswitch.conf
@@ -1,4 +1,4 @@
-MTU = 1400
+MTU = 1500
 DEVICENAME = switch0
 DEVICEADDR = 10.0.9.2
 DEVICEMASK = 255.255.255.0
diff --git a/tap/libtap.go b/tap/libtap.go
index e3b5d50..dd23502 100644
--- a/tap/libtap.go
+++ b/tap/libtap.go
@@ -37,7 +37,7 @@ func (vd *Vswitchdevice) SetDeviceConf() {
 
 	vd.mtu, vd.err = strconv.Atoi(conf.GetConfigItem("MTU"))
 
-	vd.frame = make([]byte, vd.mtu)
+	vd.frame = make([]byte, vd.mtu+22) // considering the header AND the VLAN tagging (if existing) = 22 bytes more
 
 	log.Printf("[TAP] MTU SET TO: %v", vd.mtu)