diff --git a/protos/voltha_protos/device.proto b/protos/voltha_protos/device.proto
index 8f9293a..142f8e9 100644
--- a/protos/voltha_protos/device.proto
+++ b/protos/voltha_protos/device.proto
@@ -7,7 +7,6 @@
 package voltha;
 
 import "google/protobuf/any.proto";
-import "google/protobuf/timestamp.proto";
 import "voltha_protos/common.proto";
 import "voltha_protos/meta.proto";
 import "voltha_protos/openflow_13.proto";
@@ -223,74 +222,6 @@
     repeated Port items = 1;
 }
 
-// A complete device state
-message DeviceState {
-    common.AdminState.Types admin_state = 1;
-    common.OperStatus.Types oper_status = 2;
-    common.ConnectStatus.Types connect_status = 3;
-}
-
-// A device state change
-message DeviceStatesChange {
-    DeviceState previous = 1;
-    DeviceState current = 2;
-}
-
-// A device update filter
-message DeviceUpdateFilter {
-    // Device Id
-    string device_id = 1;
-
-    // Provide update starting from this timestamp, inclusive
-    google.protobuf.Timestamp from_timestamp = 2;
-
-    // Provide update starting to this timestamp, inclusive
-    google.protobuf.Timestamp to_timestamp = 3;
-
-    // The operation that triggered the update, e.g. portCreated
-    string operation = 4;
-
-    // The ID of that operation, e.g. log correlation ID
-    string operation_id = 5;
-
-    // Component initiating the request, e.g. openolt
-    string requested_by = 6;
-
-    // Operation status
-    common.OperationResp status = 7;
-}
-
-// A device update
-message DeviceUpdate {
-    // Device Id
-    string device_id = 1;
-
-    // Timestamp of the update
-    google.protobuf.Timestamp timestamp = 2;
-
-    // The operation that triggered the update, e.g. portCreated
-    string operation = 3;
-
-    // The ID of that operation, e.g. log correlation ID
-    string operation_id = 4;
-
-    // Component initiating the request, e.g. openolt
-    string requested_by = 5;
-
-    // State change, if any, as a result of that update
-    DeviceStatesChange state_change = 6;
-
-    // Operation status
-    common.OperationResp status = 7;
-
-    // A brief description to provide more context to this update
-    string description = 8;
-}
-
-message DeviceUpdates {
-    repeated DeviceUpdate items = 1;
-}
-
 // A Physical Device instance
 message Device {
     // Voltha's device identifier
@@ -357,6 +288,8 @@
 
     common.OperStatus.Types oper_status = 17 [(access) = READ_ONLY];
 
+    string reason = 22 [(access) = READ_ONLY];  //  Used in FAILED state
+
     common.ConnectStatus.Types connect_status = 18 [(access) = READ_ONLY];
 
     // TODO additional common attribute here