diff --git a/openolt.proto b/openolt.proto
index 312d789..f94b11f 100644
--- a/openolt.proto
+++ b/openolt.proto
@@ -50,6 +50,7 @@
         OnuDiscIndication onu_disc_ind = 4;
         OnuIndication onu_ind = 5;
         OmciIndication omci_ind = 6;
+        DataIndication data_ind = 7;
     }
 }
 
@@ -86,6 +87,13 @@
     bytes pkt = 3;
 }
 
+message DataIndication {
+    fixed32 intf_id = 1;
+    fixed32 gemport_id = 2;
+    fixed32 flow_id = 3;
+    bytes data = 4;
+}
+
 message Onu {
     fixed32 intf_id = 1;
     fixed32 onu_id = 2;