fix the fttb subscriber vlan filter

Change-Id: I12c874dc53eb0c8479141c2818272bbc29721d86
diff --git a/internal/pkg/core/device_handler.go b/internal/pkg/core/device_handler.go
index af7fef3..e6236fc 100755
--- a/internal/pkg/core/device_handler.go
+++ b/internal/pkg/core/device_handler.go
@@ -3302,6 +3302,10 @@
 	if loSetVlan == uint16(of.OfpVlanId_OFPVID_NONE) && loMatchVlan == uint16(of.OfpVlanId_OFPVID_PRESENT) {
 		logger.Debugw(ctx, "flow-add vlan-any/copy", log.Fields{"device-id": dh.DeviceID})
 		loSetVlan = loMatchVlan //both 'transparent' (copy any)
+	} else if loSetVlan == uint16(of.OfpVlanId_OFPVID_NONE) && loMatchVlan != uint16(of.OfpVlanId_OFPVID_PRESENT) &&
+		loInnerCvlan != uint16(of.OfpVlanId_OFPVID_NONE) {
+		loSetVlan = loMatchVlan
+		logger.Debugw(ctx, "flow-add, double tagged case, set setvlan to matchvlan ", log.Fields{"device-id": dh.DeviceID, "loSetVlan": loSetVlan, "loMatchVlan": loMatchVlan})
 	} else {
 		//looks like OMCI value 4097 (copyFromOuter - for Uni double tagged) is not supported here
 		if loSetVlan != uint16(of.OfpVlanId_OFPVID_PRESENT) {