diff --git a/internal/pkg/core/l2oam/msg_toam_set.go b/internal/pkg/core/l2oam/msg_toam_set.go
new file mode 100644
index 0000000..7aa6bec
--- /dev/null
+++ b/internal/pkg/core/l2oam/msg_toam_set.go
@@ -0,0 +1,223 @@
+/*
+ * Copyright 2020-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 l2oam
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+)
+
+// TOAMSetRequest is a structure for SET request of TOAM message
+type TOAMSetRequest struct {
+	layers.BaseLayer
+	Opcode uint8
+	Flags      uint16
+	OAMPDUCode uint8
+	OUId       []byte // Organizationally Unique Identifier: 2a:ea:15 (Tibit Communications)
+	TOMIOpcode uint8
+	CTBranch   uint8
+	CTType     uint16
+	CTLength   uint8
+	CTInstance uint32
+	OCBranch   uint8
+	OCType     uint16
+	OCLength   uint8
+	OCInstance uint32
+	VcBranch uint8
+	VcLeaf   uint16
+	VcLength uint8
+	ECLength uint8
+	ECValue  []byte
+	ECList []ECValueSet
+	EndBranch uint8
+}
+
+// ECValueSet is a structure for Vc-EC object
+type ECValueSet struct {
+	Length uint8
+	Value  []byte
+}
+
+// String returns the string expression of TOAMSetRequest
+func (d *TOAMSetRequest) String() string {
+	message := fmt.Sprintf("Opcode:%x, Flags:%x, OAMPDUCode:%x, OUId:%v", d.Opcode, d.Flags, d.OAMPDUCode, hex.EncodeToString(d.OUId))
+	message = fmt.Sprintf("%s, TOMIOpcode:%x", message, d.TOMIOpcode)
+	message = fmt.Sprintf("%s, CTBranch:%x, CTType:%x, CTLength:%x, CTInstance:%x", message, d.CTBranch, d.CTType, d.CTLength, d.CTInstance)
+	message = fmt.Sprintf("%s, OCBranch:%x, OCType:%x, OCLength:%x, OCInstance:%x", message, d.OCBranch, d.OCType, d.OCLength, d.OCInstance)
+	message = fmt.Sprintf("%s, VcBranch:%x, VcLeaf:%x, VcLength:%x", message, d.VcBranch, d.VcLeaf, d.VcLength)
+	message = fmt.Sprintf("%s, ECLength:%x, ECValue:%v, EndBranch:%x", message, d.ECLength, hex.EncodeToString(d.ECValue), d.EndBranch)
+	return message
+}
+
+// Len returns the length of TOAMSetRequest
+func (d *TOAMSetRequest) Len() int {
+	if d.VcLength != 0x80 {
+		return 22 + int(d.CTLength) + int(d.OCLength) + int(d.VcLength)
+	}
+	return 22 + int(d.CTLength) + int(d.OCLength)
+
+}
+
+// LayerType returns the ethernet type of TOAMSetRequest
+func (d *TOAMSetRequest) LayerType() gopacket.LayerType { return layers.LayerTypeEthernet }
+
+// SerializeTo serializes a data structure to byte arrays
+func (d *TOAMSetRequest) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error {
+	plen := int(d.Len())
+	data, err := b.PrependBytes(plen)
+	if err != nil {
+		return err
+	}
+
+	i := 0
+	data[i] = byte(d.Opcode)
+	i++
+	binary.BigEndian.PutUint16(data[i:i+2], d.Flags)
+	i += 2
+	data[i] = byte(d.OAMPDUCode)
+	i++
+	copy(data[i:i+len(d.OUId)], d.OUId)
+	i += len(d.OUId)
+	data[i] = byte(d.TOMIOpcode)
+	i++
+	data[i] = byte(d.CTBranch)
+	i++
+	binary.BigEndian.PutUint16(data[i:i+2], d.CTType)
+	i += 2
+	data[i] = byte(d.CTLength)
+	i++
+	binary.BigEndian.PutUint32(data[i:i+4], d.CTInstance)
+	i += 4
+	data[i] = byte(d.OCBranch)
+	i++
+	binary.BigEndian.PutUint16(data[i:i+2], d.OCType)
+	i += 2
+	data[i] = byte(d.OCLength)
+	i++
+	binary.BigEndian.PutUint32(data[i:i+4], d.OCInstance)
+	i += 4
+	data[i] = byte(d.VcBranch)
+	i++
+	binary.BigEndian.PutUint16(data[i:i+2], d.VcLeaf)
+	i += 2
+	data[i] = byte(d.VcLength)
+	i++
+	if d.VcLength != 0x80 {
+		// EC
+		data[i] = byte(d.ECLength)
+		i++
+		copy(data[i:i+int(d.ECLength)], d.ECValue)
+		i += int(d.ECLength)
+	}
+	if d.ECList != nil {
+		for _, ecSet := range d.ECList {
+			data[i] = byte(ecSet.Length)
+			i++
+			copy(data[i:i+int(ecSet.Length)], ecSet.Value)
+			i += int(ecSet.Length)
+		}
+	}
+
+	data[i] = byte(d.EndBranch)
+
+	return nil
+}
+
+// TOAMSetResponse is a structure for SET response of TOAM message
+type TOAMSetResponse struct {
+	layers.BaseLayer
+	Opcode uint8
+	Flags      uint16
+	OAMPDUCode uint8
+	OUId       []byte // Organizationally Unique Identifier: 2a:ea:15 (Tibit Communications)
+	TOMIOpcode uint8
+	CTBranch   uint8
+	CTType     uint16
+	CTLength   uint8
+	CTInstance uint32
+	OCBranch   uint8
+	OCType     uint16
+	OCLength   uint8
+	OCInstance uint32
+	VcBranch      uint8
+	VcLeaf        uint16
+	VcTOMIResCode uint8
+	EndBranch uint8
+}
+
+// String returns the string expression of TOAMSetResponse
+func (d *TOAMSetResponse) String() string {
+	message := fmt.Sprintf("Opcode:%x, Flags:%x, OAMPDUCode:%x, OUId:%v", d.Opcode, d.Flags, d.OAMPDUCode, hex.EncodeToString(d.OUId))
+	message = fmt.Sprintf("%s, TOMIOpcode:%x", message, d.TOMIOpcode)
+	message = fmt.Sprintf("%s, CTBranch:%x, CTType:%x, CTLength:%x, CTInstance:%x", message, d.CTBranch, d.CTType, d.CTLength, d.CTInstance)
+	message = fmt.Sprintf("%s, OCBranch:%x, OCType:%x, OCLength:%x, OCInstance:%x", message, d.OCBranch, d.OCType, d.OCLength, d.OCInstance)
+	message = fmt.Sprintf("%s, VcBranch:%x, VcLeaf:%x, VcTOMIResCode:%x, EndBranch:%x", message, d.VcBranch, d.VcLeaf, d.VcTOMIResCode, d.EndBranch)
+	return message
+}
+
+// Len returns the length of TOAMSetResponse
+func (d *TOAMSetResponse) Len() int {
+	return 34 + int(d.CTLength) + int(d.OCLength)
+}
+
+// LayerType returns the ethernet type of TOAMSetResponse
+func (d *TOAMSetResponse) LayerType() gopacket.LayerType { return layers.LayerTypeEthernet }
+
+// Decode decodes byte arrays to a data structure
+func (d *TOAMSetResponse) Decode(data []byte) error {
+	i := 0
+	d.Opcode = data[i]
+	i++
+	d.Flags = binary.BigEndian.Uint16(data[i : i+2])
+	i += 2
+	d.OAMPDUCode = data[i]
+	i++
+	d.OUId = data[i : i+3]
+	i += len(d.OUId)
+	d.TOMIOpcode = data[i]
+	i++
+	d.CTBranch = data[i]
+	i++
+	d.CTType = binary.BigEndian.Uint16(data[i : i+2])
+	i += 2
+	d.CTLength = data[i]
+	i++
+	d.CTInstance = binary.BigEndian.Uint32(data[i : i+4])
+	i += 4
+	d.OCBranch = data[i]
+	i++
+	d.OCType = binary.BigEndian.Uint16(data[i : i+2])
+	i += 2
+	d.OCLength = data[i]
+	i++
+	d.OCInstance = binary.BigEndian.Uint32(data[i : i+4])
+	i += 4
+	d.VcBranch = data[i]
+	i++
+	d.VcLeaf = binary.BigEndian.Uint16(data[i : i+2])
+	i += 2
+	d.VcTOMIResCode = data[i]
+	i++
+	d.EndBranch = data[i]
+
+	return nil
+}