diff --git a/relaxed_decode.go b/relaxed_decode.go
new file mode 100644
index 0000000..adf3fb2
--- /dev/null
+++ b/relaxed_decode.go
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
+ * 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 omci
+
+import (
+	"fmt"
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	me "github.com/opencord/omci-lib-go/generated"
+)
+
+type UnknownAttributeInfo struct {
+	EntityClass    me.ClassID
+	EntityInstance uint16
+	AttributeMask  uint16
+	AttributeData  []byte
+}
+type UnknownAttributes struct {
+	// Each Attributes entry relates one or more unknown attributes to a specific managed
+	// entity. For message types such as MIB Upload Next responses, there may be multiple
+	// Managed Entities in a single response if the Extended Message set is being used.
+	Attributes []UnknownAttributeInfo
+
+	gopacket.Layer
+	layers.BaseLayer
+	MsgLayerType gopacket.LayerType
+}
+
+// SerializeTo provides serialization of an Get Next Message Type Response
+func (msg *UnknownAttributes) String() string {
+	return fmt.Sprintf("Unknown Attributes, %v Managed Entities", len(msg.Attributes))
+}
+
+// LayerType returns LayerTypeGetNextResponse
+func (msg *UnknownAttributes) LayerType() gopacket.LayerType {
+	return LayerTypeUnknownAttributes
+}
+
+// CanDecode returns the set of layer types that this DecodingLayer can decode
+func (msg *UnknownAttributes) CanDecode() gopacket.LayerClass {
+	return LayerTypeUnknownAttributes
+}
+
+// LayerContents returns the bytes of the packet layer.
+func (msg *UnknownAttributes) LayerContents() []byte {
+	return msg.Contents
+}
+
+// LayerPayload returns the bytes contained within the packet layer
+func (msg *UnknownAttributes) LayerPayload() []byte {
+	return msg.Payload
+}
+
+// NextLayerType returns the layer type contained by this DecodingLayer.
+func (msg *UnknownAttributes) NextLayerType() gopacket.LayerType {
+	return gopacket.LayerTypeZero
+}
+
+// DecodeFromBytes decodes the given bytes of a Get Next Response into this layer
+func (msg *UnknownAttributes) DecodeFromBytes(_ []byte, _ gopacket.PacketBuilder) error {
+	// This is not a real layer. It is used to pass on relaxed decode error information
+	// as an ErrorLayer
+	return fmt.Errorf("This function is never called.  This is an error layer that gets assigned")
+}
+
+func decodeUnknownAttributes(_ []byte, _ gopacket.PacketBuilder) error {
+	return fmt.Errorf("This function is never called.  This is an error layer that gets assigned")
+}
+
+func (msg *UnknownAttributes) Error() error {
+	return fmt.Errorf("%v managed entities with Unknown Attributes detected during decode",
+		len(msg.Attributes))
+}
+
+func newUnknownAttributesLayer(prevLayer gopacket.Layer, errInfo []me.IRelaxedDecodeError, p gopacket.PacketBuilder) error {
+	// Add the previous layer
+	p.AddLayer(prevLayer)
+
+	// Append unknown attributes layer and also set ErrorLayer
+
+	errLayer := &UnknownAttributes{
+		Attributes:   make([]UnknownAttributeInfo, 0),
+		MsgLayerType: LayerTypeUnknownAttributes,
+	}
+	for _, item := range errInfo {
+		unknown, ok := item.(*me.UnknownAttributeDecodeError)
+		if !ok {
+			return fmt.Errorf("only UnknownAttributeDecodeError information can be encoded. Found %T",
+				unknown)
+		}
+		data := UnknownAttributeInfo{
+			EntityClass:    unknown.EntityClass,
+			EntityInstance: unknown.EntityInstance,
+			AttributeMask:  unknown.AttributeMask,
+		}
+		if unknown.Contents != nil {
+			data.AttributeData = make([]byte, len(unknown.Contents))
+			copy(data.AttributeData, unknown.Contents)
+		}
+		errLayer.Attributes = append(errLayer.Attributes, data)
+	}
+	p.AddLayer(errLayer)
+	p.SetErrorLayer(errLayer)
+
+	// Return a valid error so that packet decoding stops
+	return errLayer.Error()
+}