diff --git a/incubator/protobuf/src/main/proto/models/Device.proto b/incubator/protobuf/src/main/proto/models/Device.proto
new file mode 100644
index 0000000..75cf0f5
--- /dev/null
+++ b/incubator/protobuf/src/main/proto/models/Device.proto
@@ -0,0 +1,51 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net";
+
+package Device;
+
+message DeviceDescription {
+  string device_Uri = 1;
+  DeviceType type = 2;
+  string manufacturer = 3;
+  string hw_version = 4;
+  string sw_version = 5;
+  string serial_number = 6;
+  string chassis_id = 7;
+  map<string, string> annotations = 8;
+  bool is_default_available = 9;
+}
+
+enum MastershipRole {
+  NONE = 0;
+  MASTER = 1;
+  STANDBY = 2;
+}
+
+enum DeviceType {
+  OTHER = 0;
+  SWITCH = 1;
+  ROUTER = 2;
+  ROADM = 3;
+  OTN = 4;
+  ROADM_OTN = 5;
+  FIREWALL = 6;
+  BALANCER = 7;
+  IPS = 8;
+  IDS = 9;
+  CONTROLLER = 10;
+  VIRTUAL = 11;
+  FIBER_SWITCH = 12;
+  MICROWAVE = 13;
+}
+
+// Corresponds to org.onosproject.net.Device.
+message DeviceCore {
+  string deviceId = 1;
+  DeviceType type = 2;
+  string manufacturer = 3;
+  string hw_version = 4;
+  string sw_version = 5;
+  string serial_number = 6;
+  string chassis_id = 7;
+  map<string, string> annotations = 8;
+}
diff --git a/incubator/protobuf/src/main/proto/models/DeviceEvent.proto b/incubator/protobuf/src/main/proto/models/DeviceEvent.proto
new file mode 100644
index 0000000..f834aa1
--- /dev/null
+++ b/incubator/protobuf/src/main/proto/models/DeviceEvent.proto
@@ -0,0 +1,28 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net";
+
+
+import "models/Device.proto";
+import "models/Port.proto";
+
+package DeviceEvent;
+
+// Corresponds to org.onosproject.net.device.DeviceEvent.
+message DeviceNotification {
+    Device.DeviceCore device = 1;
+    DeviceEventType deviceEventType = 2;
+    Port.PortCore port = 3;
+}
+
+enum DeviceEventType {
+    DEVICE_ADDED = 0;
+    DEVICE_UPDATED = 1;
+    DEVICE_REMOVED = 2;
+    DEVICE_SUSPENDED = 3;
+    DEVICE_AVAILABILITY_CHANGED = 4;
+    PORT_ADDED = 5;
+    PORT_UPDATED = 6;
+    PORT_REMOVED = 7;
+    PORT_STATS_UPDATED = 8;
+}
+
diff --git a/incubator/protobuf/src/main/proto/models/Link.proto b/incubator/protobuf/src/main/proto/models/Link.proto
new file mode 100644
index 0000000..a1ae8ff
--- /dev/null
+++ b/incubator/protobuf/src/main/proto/models/Link.proto
@@ -0,0 +1,60 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net";
+
+package Link;
+
+enum LinkType {
+  // Signifies that this is a direct single-segment link.
+  DIRECT = 0;
+
+  // Signifies that this link is potentially comprised from multiple
+  // underlying segments or hops, and as such should be used to tag
+  // links traversing optical paths, tunnels or intervening 'dark'
+  // switches.
+  INDIRECT = 1;
+
+  // Signifies that this link is an edge, i.e. host link.
+  EDGE = 2;
+
+  // Signifies that this link represents a logical link backed by
+  // some form of a tunnel, e.g., GRE, MPLS, ODUk, OCH.
+  TUNNEL = 3;
+
+  // Signifies that this link is realized by fiber (either single channel or WDM).
+  OPTICAL = 4;
+
+  // Signifies that this link is a virtual link or a pseudo-wire.
+  VIRTUAL = 5;
+}
+
+message ConnectPoint {
+  oneof element_id {
+    // DeviceID as String DeviceId#toString
+    string device_id = 1;
+
+    // TODO add support to other element_id if required
+  }
+  // PortNumber as String PortNumber#toString
+  string port_number = 2;
+}
+
+enum LinkState {
+    ACTIVE = 0;
+    INACTIVE = 1;
+}
+
+// Corresponds to org.onosproject.net.Link.
+message LinkCore {
+  LinkState state = 1;
+  ConnectPoint src = 2;
+  ConnectPoint dst = 3;
+  LinkType type = 4;
+  map<string, string> annotations = 5;
+}
+
+message LinkDescription {
+  ConnectPoint src = 1;
+  ConnectPoint dst = 2;
+  LinkType type = 3;
+  map<string, string> annotations = 4;
+}
diff --git a/incubator/protobuf/src/main/proto/models/LinkEvent.proto b/incubator/protobuf/src/main/proto/models/LinkEvent.proto
new file mode 100644
index 0000000..fcd13fb
--- /dev/null
+++ b/incubator/protobuf/src/main/proto/models/LinkEvent.proto
@@ -0,0 +1,19 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net";
+
+package LinkEvent;
+
+import "models/Link.proto";
+
+// Corresponds to org.onosproject.net.link.LinkEvent.
+message LinkNotification {
+    LinkEventType linkEventType = 2;
+    Link.LinkCore link = 3;
+}
+
+// Link Event Types
+enum LinkEventType {
+    LINK_ADDED = 0;
+    LINK_UPDATED = 1;
+    LINK_REMOVED = 2;
+}
diff --git a/incubator/protobuf/src/main/proto/models/Port.proto b/incubator/protobuf/src/main/proto/models/Port.proto
new file mode 100644
index 0000000..a3fd34d
--- /dev/null
+++ b/incubator/protobuf/src/main/proto/models/Port.proto
@@ -0,0 +1,48 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net";
+
+package Port;
+
+enum PortType {
+  // Signifies copper-based connectivity.
+  COPPER = 0;
+  // Signifies optical fiber-based connectivity.
+  FIBER = 1;
+  // Signifies optical fiber-based packet port.
+  PACKET = 2;
+  // Signifies optical fiber-based optical tributary port (called T-port).
+  //The signal from the client side will be formed into a ITU G.709 (OTN) frame.
+  ODUCLT = 3;
+  // Signifies optical fiber-based Line-side port (called L-port).
+  OCH = 4;
+  // Signifies optical fiber-based WDM port (called W-port).
+  //Optical Multiplexing Section (See ITU G.709).
+  OMS = 5;
+  // Signifies virtual port.
+  VIRTUAL = 6;
+}
+
+message PortDescription {
+  // PortNumber as String PortNumber#toString
+  string port_number = 1;
+  bool is_enabled = 2;
+  PortType type = 3;
+  int64 port_speed = 4;
+  map<string, string> annotations = 8;
+}
+
+// Corresponds to org.onosproject.net.Port.
+message PortCore {
+  string port_number = 1;
+  bool is_enabled = 2;
+  PortType type = 3;
+  int64 port_speed = 4;
+  map<string, string> annotations = 5;
+}
+
+message PortStatistics {
+  int32 port = 1;
+  int64 packets_received = 2;
+  int64 packets_sent = 3;
+  // TODO add all other fields
+}