diff --git a/ponsim/v2/common/flow_sort.go b/ponsim/v2/common/flow_sort.go
index f62f7ca..0e4a085 100644
--- a/ponsim/v2/common/flow_sort.go
+++ b/ponsim/v2/common/flow_sort.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package common
 
 import (
diff --git a/ponsim/v2/common/interval_handler.go b/ponsim/v2/common/interval_handler.go
index 973865e..813b0b2 100644
--- a/ponsim/v2/common/interval_handler.go
+++ b/ponsim/v2/common/interval_handler.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package common
 
 import (
diff --git a/ponsim/v2/common/interval_handler_test.go b/ponsim/v2/common/interval_handler_test.go
index e1f060f..c28cb42 100644
--- a/ponsim/v2/common/interval_handler_test.go
+++ b/ponsim/v2/common/interval_handler_test.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package common
 
 import (
diff --git a/ponsim/v2/common/logger.go b/ponsim/v2/common/logger.go
index 7749dd2..15b2de9 100644
--- a/ponsim/v2/common/logger.go
+++ b/ponsim/v2/common/logger.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package common
 
 import (
diff --git a/ponsim/v2/common/net_utils.go b/ponsim/v2/common/net_utils.go
index c37c4ef..d203883 100644
--- a/ponsim/v2/common/net_utils.go
+++ b/ponsim/v2/common/net_utils.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package common
 
 import (
diff --git a/ponsim/v2/core/ponsim_alarm.go b/ponsim/v2/core/ponsim_alarm.go
index e99b84d..d1564ba 100644
--- a/ponsim/v2/core/ponsim_alarm.go
+++ b/ponsim/v2/core/ponsim_alarm.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/core/ponsim_api_type.go b/ponsim/v2/core/ponsim_api_type.go
index f178c9b..ad2dc84 100644
--- a/ponsim/v2/core/ponsim_api_type.go
+++ b/ponsim/v2/core/ponsim_api_type.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 type PonSimApiType uint8
diff --git a/ponsim/v2/core/ponsim_device.go b/ponsim/v2/core/ponsim_device.go
index c13d003..a1931f8 100644
--- a/ponsim/v2/core/ponsim_device.go
+++ b/ponsim/v2/core/ponsim_device.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/core/ponsim_device_state.go b/ponsim/v2/core/ponsim_device_state.go
index a5805a2..d716a94 100644
--- a/ponsim/v2/core/ponsim_device_state.go
+++ b/ponsim/v2/core/ponsim_device_state.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 type PonSimDeviceState uint8
diff --git a/ponsim/v2/core/ponsim_device_type.go b/ponsim/v2/core/ponsim_device_type.go
index 306440c..811ac81 100644
--- a/ponsim/v2/core/ponsim_device_type.go
+++ b/ponsim/v2/core/ponsim_device_type.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 type PonSimDeviceType uint8
diff --git a/ponsim/v2/core/ponsim_interface.go b/ponsim/v2/core/ponsim_interface.go
index d73d2ca..fbceae2 100644
--- a/ponsim/v2/core/ponsim_interface.go
+++ b/ponsim/v2/core/ponsim_interface.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/core/ponsim_metric.go b/ponsim/v2/core/ponsim_metric.go
index d28c420..953a438 100644
--- a/ponsim/v2/core/ponsim_metric.go
+++ b/ponsim/v2/core/ponsim_metric.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/core/ponsim_olt.go b/ponsim/v2/core/ponsim_olt.go
index 2485a67..508f455 100644
--- a/ponsim/v2/core/ponsim_olt.go
+++ b/ponsim/v2/core/ponsim_olt.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/core/ponsim_onu.go b/ponsim/v2/core/ponsim_onu.go
index f58d473..1037cb9 100644
--- a/ponsim/v2/core/ponsim_onu.go
+++ b/ponsim/v2/core/ponsim_onu.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/core/xponsim_device.go b/ponsim/v2/core/xponsim_device.go
index aa7d64a..e5ccdd3 100644
--- a/ponsim/v2/core/xponsim_device.go
+++ b/ponsim/v2/core/xponsim_device.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package core
 
 import (
diff --git a/ponsim/v2/grpc/grpc_security.go b/ponsim/v2/grpc/grpc_security.go
index 6dab468..4345a85 100644
--- a/ponsim/v2/grpc/grpc_security.go
+++ b/ponsim/v2/grpc/grpc_security.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package grpc
 
 type GrpcSecurity struct {
diff --git a/ponsim/v2/grpc/grpc_server.go b/ponsim/v2/grpc/grpc_server.go
index aaa8a4d..6c952a1 100644
--- a/ponsim/v2/grpc/grpc_server.go
+++ b/ponsim/v2/grpc/grpc_server.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package grpc
 
 import (
diff --git a/ponsim/v2/grpc/nbi/bal_handler.go b/ponsim/v2/grpc/nbi/bal_handler.go
index 5cbafb3..c3eadf8 100644
--- a/ponsim/v2/grpc/nbi/bal_handler.go
+++ b/ponsim/v2/grpc/nbi/bal_handler.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package nbi
 
 import (
diff --git a/ponsim/v2/grpc/nbi/ponsim_handler.go b/ponsim/v2/grpc/nbi/ponsim_handler.go
index 763f4bc..9e4fb0c 100644
--- a/ponsim/v2/grpc/nbi/ponsim_handler.go
+++ b/ponsim/v2/grpc/nbi/ponsim_handler.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package nbi
 
 import (
diff --git a/ponsim/v2/grpc/nbi/xponsim_handler.go b/ponsim/v2/grpc/nbi/xponsim_handler.go
index fbc63eb..28cb205 100644
--- a/ponsim/v2/grpc/nbi/xponsim_handler.go
+++ b/ponsim/v2/grpc/nbi/xponsim_handler.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package nbi
 
 import (
diff --git a/ponsim/v2/grpc/sbi/common_handler.go b/ponsim/v2/grpc/sbi/common_handler.go
index 4c59af6..ee1d036 100644
--- a/ponsim/v2/grpc/sbi/common_handler.go
+++ b/ponsim/v2/grpc/sbi/common_handler.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package sbi
 
 import (
diff --git a/ponsim/v2/grpc/sbi/olt_handler.go b/ponsim/v2/grpc/sbi/olt_handler.go
index bb058ca..a264532 100644
--- a/ponsim/v2/grpc/sbi/olt_handler.go
+++ b/ponsim/v2/grpc/sbi/olt_handler.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package sbi
 
 import (
diff --git a/ponsim/v2/ponsim.go b/ponsim/v2/ponsim.go
index fad0972..20f8b86 100644
--- a/ponsim/v2/ponsim.go
+++ b/ponsim/v2/ponsim.go
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package main
 
 import (
diff --git a/ponsim/v2/scripts/build_protos.sh b/ponsim/v2/scripts/build_protos.sh
index 39fc31e..4c8ceaa 100644
--- a/ponsim/v2/scripts/build_protos.sh
+++ b/ponsim/v2/scripts/build_protos.sh
@@ -1,4 +1,17 @@
 #!/bin/sh
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 export SRC_DIR="$1"