diff --git a/neutron_lib/plugins/ml2/ovs_constants.py b/neutron_lib/plugins/ml2/ovs_constants.py
index 4350224c1..3a2d860a8 100644
--- a/neutron_lib/plugins/ml2/ovs_constants.py
+++ b/neutron_lib/plugins/ml2/ovs_constants.py
@@ -156,11 +156,21 @@ DVR_PROCESS_PHYSICAL = 1
 LOCAL_VLAN_TRANSLATION = 2
 DVR_NOT_LEARN_PHYSICAL = 3
 
+METADATA_EGRESS_NAT = 80
+METADATA_EGRESS_OUTPUT = 87
+METADATA_IP_ARP_RESPONDER = 90
+METADATA_INGRESS_DIRECT = 91
+
 PHY_BR_ALL_TABLES = (
     LOCAL_SWITCHING,
     DVR_PROCESS_PHYSICAL,
     LOCAL_VLAN_TRANSLATION,
-    DVR_NOT_LEARN_PHYSICAL)
+    DVR_NOT_LEARN_PHYSICAL,
+    METADATA_EGRESS_NAT,
+    METADATA_EGRESS_OUTPUT,
+    METADATA_IP_ARP_RESPONDER,
+    METADATA_INGRESS_DIRECT,
+)
 
 # --- end of OpenFlow table IDs