diff --git a/rw_core/core/adapter_proxy.go b/rw_core/core/adapter_proxy.go
index b26b161..d21cfdb 100644
--- a/rw_core/core/adapter_proxy.go
+++ b/rw_core/core/adapter_proxy.go
@@ -266,29 +266,125 @@
 	return nil, nil
 }
 
-func (ap *AdapterProxy) DownloadImage(device voltha.Device, download voltha.ImageDownload) error {
-	log.Debug("DownloadImage")
-	return nil
+func (ap *AdapterProxy) DownloadImage(ctx context.Context, device *voltha.Device, download *voltha.ImageDownload) error {
+	log.Debugw("DownloadImage", log.Fields{"deviceId": device.Id, "image": download.Name})
+	rpc := "download_image"
+	toTopic := kafka.CreateSubTopic(device.Type, device.Id)
+	args := make([]*kafka.KVArg, 2)
+	args[0] = &kafka.KVArg{
+		Key:   "device",
+		Value: device,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "request",
+		Value: download,
+	}
+	// Use a device specific topic as we are the only core handling requests for this device
+	replyToTopic := kafka.CreateSubTopic(ap.kafkaICProxy.DefaultTopic.Name, device.Id)
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &toTopic, &replyToTopic, true, args...)
+	log.Debugw("DownloadImage-response", log.Fields{"deviceId": device.Id, "success": success})
+
+	return unPackResponse(rpc, device.Id, success, result)
 }
 
-func (ap *AdapterProxy) GetImageDownloadStatus(device voltha.Device, download voltha.ImageDownload) error {
-	log.Debug("GetImageDownloadStatus")
-	return nil
+func (ap *AdapterProxy) GetImageDownloadStatus(ctx context.Context, device *voltha.Device, download *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownloadStatus", log.Fields{"deviceId": device.Id, "image": download.Name})
+	rpc := "get_image_download_status"
+	toTopic := kafka.CreateSubTopic(device.Type, device.Id)
+	args := make([]*kafka.KVArg, 2)
+	args[0] = &kafka.KVArg{
+		Key:   "device",
+		Value: device,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "request",
+		Value: download,
+	}
+	// Use a device specific topic as we are the only core handling requests for this device
+	replyToTopic := kafka.CreateSubTopic(ap.kafkaICProxy.DefaultTopic.Name, device.Id)
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &toTopic, &replyToTopic, true, args...)
+	log.Debugw("GetImageDownloadStatus-response", log.Fields{"deviceId": device.Id, "success": success})
+
+	if success {
+		unpackResult := &voltha.ImageDownload{}
+		if err := ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, status.Errorf(codes.InvalidArgument, "%s", err.Error())
+		}
+		return unpackResult, nil
+	} else {
+		unpackResult := &ic.Error{}
+		var err error
+		if err = ptypes.UnmarshalAny(result, unpackResult); err != nil {
+			log.Warnw("cannot-unmarshal-response", log.Fields{"error": err})
+			return nil, err
+		}
+		log.Debugw("GetImageDownloadStatus-return", log.Fields{"deviceid": device.Id, "success": success, "error": err})
+		return nil, status.Errorf(codes.Internal, "%s", unpackResult.Reason)
+	}
 }
 
-func (ap *AdapterProxy) CancelImageDownload(device voltha.Device, download voltha.ImageDownload) error {
-	log.Debug("CancelImageDownload")
-	return nil
+func (ap *AdapterProxy) CancelImageDownload(ctx context.Context, device *voltha.Device, download *voltha.ImageDownload) error {
+	log.Debugw("CancelImageDownload", log.Fields{"deviceId": device.Id, "image": download.Name})
+	rpc := "cancel_image_download"
+	toTopic := kafka.CreateSubTopic(device.Type, device.Id)
+	args := make([]*kafka.KVArg, 2)
+	args[0] = &kafka.KVArg{
+		Key:   "device",
+		Value: device,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "request",
+		Value: download,
+	}
+	// Use a device specific topic as we are the only core handling requests for this device
+	replyToTopic := kafka.CreateSubTopic(ap.kafkaICProxy.DefaultTopic.Name, device.Id)
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &toTopic, &replyToTopic, true, args...)
+	log.Debugw("CancelImageDownload-response", log.Fields{"deviceId": device.Id, "success": success})
+
+	return unPackResponse(rpc, device.Id, success, result)
 }
 
-func (ap *AdapterProxy) ActivateImageUpdate(device voltha.Device, download voltha.ImageDownload) error {
-	log.Debug("ActivateImageUpdate")
-	return nil
+func (ap *AdapterProxy) ActivateImageUpdate(ctx context.Context, device *voltha.Device, download *voltha.ImageDownload) error {
+	log.Debugw("ActivateImageUpdate", log.Fields{"deviceId": device.Id, "image": download.Name})
+	rpc := "activate_image_update"
+	toTopic := kafka.CreateSubTopic(device.Type, device.Id)
+	args := make([]*kafka.KVArg, 2)
+	args[0] = &kafka.KVArg{
+		Key:   "device",
+		Value: device,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "request",
+		Value: download,
+	}
+	// Use a device specific topic as we are the only core handling requests for this device
+	replyToTopic := kafka.CreateSubTopic(ap.kafkaICProxy.DefaultTopic.Name, device.Id)
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &toTopic, &replyToTopic, true, args...)
+	log.Debugw("ActivateImageUpdate-response", log.Fields{"deviceId": device.Id, "success": success})
+
+	return unPackResponse(rpc, device.Id, success, result)
 }
 
-func (ap *AdapterProxy) RevertImageUpdate(device voltha.Device, download voltha.ImageDownload) error {
-	log.Debug("RevertImageUpdate")
-	return nil
+func (ap *AdapterProxy) RevertImageUpdate(ctx context.Context, device *voltha.Device, download *voltha.ImageDownload) error {
+	log.Debugw("RevertImageUpdate", log.Fields{"deviceId": device.Id, "image": download.Name})
+	rpc := "revert_image_update"
+	toTopic := kafka.CreateSubTopic(device.Type, device.Id)
+	args := make([]*kafka.KVArg, 2)
+	args[0] = &kafka.KVArg{
+		Key:   "device",
+		Value: device,
+	}
+	args[1] = &kafka.KVArg{
+		Key:   "request",
+		Value: download,
+	}
+	// Use a device specific topic as we are the only core handling requests for this device
+	replyToTopic := kafka.CreateSubTopic(ap.kafkaICProxy.DefaultTopic.Name, device.Id)
+	success, result := ap.kafkaICProxy.InvokeRPC(ctx, rpc, &toTopic, &replyToTopic, true, args...)
+	log.Debugw("RevertImageUpdate-response", log.Fields{"deviceId": device.Id, "success": success})
+
+	return unPackResponse(rpc, device.Id, success, result)
 }
 
 func (ap *AdapterProxy) SelfTestDevice(device voltha.Device) (*voltha.SelfTestResponse, error) {
diff --git a/rw_core/core/adapter_request_handler.go b/rw_core/core/adapter_request_handler.go
index d7e1b0a..6893179 100644
--- a/rw_core/core/adapter_request_handler.go
+++ b/rw_core/core/adapter_request_handler.go
@@ -495,3 +495,34 @@
 	go rhp.deviceMgr.PacketIn(deviceId.Id, uint32(portNo.Val), packet.Payload)
 	return new(empty.Empty), nil
 }
+
+
+func (rhp *AdapterRequestHandlerProxy) UpdateImageDownload(args []*ic.Argument) (*empty.Empty, error) {
+	if len(args) < 2 {
+		log.Warn("invalid-number-of-args", log.Fields{"args": args})
+		err := errors.New("invalid-number-of-args")
+		return nil, err
+	}
+	deviceId := &voltha.ID{}
+	img := &voltha.ImageDownload{}
+	for _, arg := range args {
+		switch arg.Key {
+		case "device_id":
+			if err := ptypes.UnmarshalAny(arg.Value, deviceId); err != nil {
+				log.Warnw("cannot-unmarshal-device-id", log.Fields{"error": err})
+				return nil, err
+			}
+		case "image_download":
+			if err := ptypes.UnmarshalAny(arg.Value, img); err != nil {
+				log.Warnw("cannot-unmarshal-imgaeDownload", log.Fields{"error": err})
+				return nil, err
+			}
+		}
+	}
+	log.Debugw("UpdateImageDownload", log.Fields{"deviceId": deviceId.Id, "image-download": img})
+	if rhp.TestMode { // Execute only for test cases
+		return nil, nil
+	}
+	go rhp.deviceMgr.updateImageDownload(deviceId.Id, img)
+	return new(empty.Empty), nil
+}
diff --git a/rw_core/core/device_agent.go b/rw_core/core/device_agent.go
index 3ccf808..b50ca94 100644
--- a/rw_core/core/device_agent.go
+++ b/rw_core/core/device_agent.go
@@ -302,6 +302,241 @@
 	return nil
 }
 
+func (agent *DeviceAgent) downloadImage(ctx context.Context, img *voltha.ImageDownload) (*voltha.OperationResp, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("downloadImage", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		if device.AdminState != voltha.AdminState_ENABLED {
+			log.Debugw("device-not-enabled", log.Fields{"id": agent.deviceId})
+			return nil, status.Errorf(codes.FailedPrecondition, "deviceId:%s, expected-admin-state:%s", agent.deviceId, voltha.AdminState_ENABLED)
+		}
+		// Save the image
+		clonedImg := proto.Clone(img).(*voltha.ImageDownload)
+		clonedImg.State = voltha.ImageDownload_DOWNLOAD_REQUESTED
+		cloned := proto.Clone(device).(*voltha.Device)
+		if cloned.ImageDownloads == nil {
+			cloned.ImageDownloads = []*voltha.ImageDownload{clonedImg}
+		} else {
+			cloned.ImageDownloads = append(cloned.ImageDownloads, clonedImg)
+		}
+		cloned.AdminState = voltha.AdminState_DOWNLOADING_IMAGE
+		if afterUpdate := agent.clusterDataProxy.Update("/devices/"+agent.deviceId, cloned, false, ""); afterUpdate == nil {
+			return nil, status.Errorf(codes.Internal, "failed-update-device:%s", agent.deviceId)
+		}
+		// Send the request to the adapter
+		if err := agent.adapterProxy.DownloadImage(ctx, cloned, clonedImg); err != nil {
+			log.Debugw("downloadImage-error", log.Fields{"id": agent.lastData.Id, "error": err, "image": img.Name})
+			return nil, err
+		}
+	}
+	return &voltha.OperationResp{Code: voltha.OperationResp_OPERATION_SUCCESS}, nil
+}
+
+// isImageRegistered is a helper method to figure out if an image is already registered
+func isImageRegistered(img *voltha.ImageDownload, device *voltha.Device) bool {
+	for _, image := range device.ImageDownloads {
+		if image.Id == img.Id && image.Name == img.Name {
+			return true
+		}
+	}
+	return false
+}
+
+func (agent *DeviceAgent) cancelImageDownload(ctx context.Context, img *voltha.ImageDownload) (*voltha.OperationResp, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("cancelImageDownload", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		// Verify whether the Image is in the list of image being downloaded
+		if !isImageRegistered(img, device) {
+			return nil, status.Errorf(codes.FailedPrecondition, "deviceId:%s, image-not-registered:%s", agent.deviceId, img.Name)
+		}
+
+		// Update image download state
+		cloned := proto.Clone(device).(*voltha.Device)
+		for _, image := range cloned.ImageDownloads {
+			if image.Id == img.Id && image.Name == img.Name {
+				image.State = voltha.ImageDownload_DOWNLOAD_CANCELLED
+			}
+		}
+
+		//If device is in downloading state, send the request to cancel the download
+		if device.AdminState == voltha.AdminState_DOWNLOADING_IMAGE {
+			if err := agent.adapterProxy.CancelImageDownload(ctx, device, img); err != nil {
+				log.Debugw("cancelImageDownload-error", log.Fields{"id": agent.lastData.Id, "error": err, "image": img.Name})
+				return nil, err
+			}
+			// Set the device to Enabled
+			cloned.AdminState = voltha.AdminState_ENABLED
+			if afterUpdate := agent.clusterDataProxy.Update("/devices/"+agent.deviceId, cloned, false, ""); afterUpdate == nil {
+				return nil, status.Errorf(codes.Internal, "failed-update-device:%s", agent.deviceId)
+			}
+		}
+	}
+	return &voltha.OperationResp{Code: voltha.OperationResp_OPERATION_SUCCESS}, nil
+	}
+
+func (agent *DeviceAgent) activateImage(ctx context.Context, img *voltha.ImageDownload) (*voltha.OperationResp, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("activateImage", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		// Verify whether the Image is in the list of image being downloaded
+		if !isImageRegistered(img, device) {
+			return nil, status.Errorf(codes.FailedPrecondition, "deviceId:%s, image-not-registered:%s", agent.deviceId, img.Name)
+		}
+
+		if device.AdminState == voltha.AdminState_DOWNLOADING_IMAGE {
+			return nil, status.Errorf(codes.FailedPrecondition, "deviceId:%s, device-in-downloading-state:%s", agent.deviceId, img.Name)
+		}
+		// Update image download state
+		cloned := proto.Clone(device).(*voltha.Device)
+		for _, image := range cloned.ImageDownloads {
+			if image.Id == img.Id && image.Name == img.Name {
+				image.ImageState = voltha.ImageDownload_IMAGE_ACTIVATING
+			}
+		}
+		// Set the device to downloading_image
+		cloned.AdminState = voltha.AdminState_DOWNLOADING_IMAGE
+		if afterUpdate := agent.clusterDataProxy.Update("/devices/"+agent.deviceId, cloned, false, ""); afterUpdate == nil {
+			return nil, status.Errorf(codes.Internal, "failed-update-device:%s", agent.deviceId)
+		}
+
+		if err := agent.adapterProxy.ActivateImageUpdate(ctx, device, img); err != nil {
+			log.Debugw("activateImage-error", log.Fields{"id": agent.lastData.Id, "error": err, "image": img.Name})
+			return nil, err
+		}
+		// The status of the AdminState will be changed following the update_download_status response from the adapter
+		// The image name will also be removed from the device list
+	}
+	return &voltha.OperationResp{Code: voltha.OperationResp_OPERATION_SUCCESS}, nil}
+
+
+func (agent *DeviceAgent) revertImage(ctx context.Context, img *voltha.ImageDownload) (*voltha.OperationResp, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("revertImage", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		// Verify whether the Image is in the list of image being downloaded
+		if !isImageRegistered(img, device) {
+			return nil, status.Errorf(codes.FailedPrecondition, "deviceId:%s, image-not-registered:%s", agent.deviceId, img.Name)
+		}
+
+		if device.AdminState != voltha.AdminState_ENABLED {
+			return nil, status.Errorf(codes.FailedPrecondition, "deviceId:%s, device-not-enabled-state:%s", agent.deviceId, img.Name)
+		}
+		// Update image download state
+		cloned := proto.Clone(device).(*voltha.Device)
+		for _, image := range cloned.ImageDownloads {
+			if image.Id == img.Id && image.Name == img.Name {
+				image.ImageState = voltha.ImageDownload_IMAGE_REVERTING
+			}
+		}
+		if afterUpdate := agent.clusterDataProxy.Update("/devices/"+agent.deviceId, cloned, false, ""); afterUpdate == nil {
+			return nil, status.Errorf(codes.Internal, "failed-update-device:%s", agent.deviceId)
+		}
+
+		if err := agent.adapterProxy.RevertImageUpdate(ctx, device, img); err != nil {
+			log.Debugw("revertImage-error", log.Fields{"id": agent.lastData.Id, "error": err, "image": img.Name})
+			return nil, err
+		}
+	}
+	return &voltha.OperationResp{Code: voltha.OperationResp_OPERATION_SUCCESS}, nil
+	}
+
+
+func (agent *DeviceAgent) getImageDownloadStatus(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("getImageDownloadStatus", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		if resp, err := agent.adapterProxy.GetImageDownloadStatus(ctx, device, img); err != nil {
+			log.Debugw("getImageDownloadStatus-error", log.Fields{"id": agent.lastData.Id, "error": err, "image": img.Name})
+			return nil, err
+		} else {
+			return resp, nil
+		}
+	}
+}
+
+func (agent *DeviceAgent) updateImageDownload(img *voltha.ImageDownload) error{
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("updateImageDownload", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		// Update the image as well as remove it if the download was cancelled
+		cloned := proto.Clone(device).(*voltha.Device)
+		clonedImages := make([]*voltha.ImageDownload, len(cloned.ImageDownloads))
+		for _, image := range cloned.ImageDownloads {
+			if image.Id == img.Id && image.Name == img.Name {
+				if image.State != voltha.ImageDownload_DOWNLOAD_CANCELLED {
+					clonedImages = append(clonedImages, img)
+				}
+			}
+		}
+		cloned.ImageDownloads = clonedImages
+		// Set the Admin state to enabled if required
+		if (img.State != voltha.ImageDownload_DOWNLOAD_REQUESTED &&
+			img.State != voltha.ImageDownload_DOWNLOAD_STARTED) ||
+			(img.ImageState != voltha.ImageDownload_IMAGE_ACTIVATING){
+			cloned.AdminState = voltha.AdminState_ENABLED
+		}
+
+		if afterUpdate := agent.clusterDataProxy.Update("/devices/"+agent.deviceId, cloned, false, ""); afterUpdate == nil {
+			return status.Errorf(codes.Internal, "failed-update-device:%s", agent.deviceId)
+		}
+	}
+	return nil
+}
+
+func (agent *DeviceAgent) getImageDownload(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("getImageDownload", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		for _, image := range device.ImageDownloads {
+			if image.Id == img.Id && image.Name == img.Name {
+				return image, nil
+			}
+		}
+		return nil, status.Errorf(codes.NotFound, "image-not-found:%s", img.Name)
+	}
+}
+
+func (agent *DeviceAgent) listImageDownloads(ctx context.Context, deviceId string) (*voltha.ImageDownloads, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debugw("listImageDownloads", log.Fields{"id": agent.deviceId})
+	// Get the most up to date the device info
+	if device, err := agent.getDeviceWithoutLock(); err != nil {
+		return nil, status.Errorf(codes.NotFound, "%s", agent.deviceId)
+	} else {
+		return &voltha.ImageDownloads{Items:device.ImageDownloads}, nil
+	}
+}
+
 // getPorts retrieves the ports information of the device based on the port type.
 func (agent *DeviceAgent) getPorts(ctx context.Context, portType voltha.Port_PortType) *voltha.Ports {
 	log.Debugw("getPorts", log.Fields{"id": agent.deviceId, "portType": portType})
@@ -380,7 +615,10 @@
 			return nil
 		}
 		// Perform the state transition in it's own go routine
-		agent.deviceMgr.processTransition(previous, current)
+		if err := agent.deviceMgr.processTransition(previous, current); err != nil {
+			log.Errorw("failed-process-transition", log.Fields{"deviceId": previous.Id,
+				"previousAdminState": previous.AdminState, "currentAdminState": current.AdminState})
+		}
 		return nil
 	}(args...)
 
diff --git a/rw_core/core/device_manager.go b/rw_core/core/device_manager.go
index 3f27e10..76475f9 100644
--- a/rw_core/core/device_manager.go
+++ b/rw_core/core/device_manager.go
@@ -583,6 +583,113 @@
 	return nil
 }
 
+
+func (dMgr *DeviceManager) downloadImage(ctx context.Context, img *voltha.ImageDownload, ch chan interface{}) {
+	log.Debugw("downloadImage", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	var res interface{}
+	var err error
+	if agent := dMgr.getDeviceAgent(img.Id); agent != nil {
+		if res, err = agent.downloadImage(ctx, img); err != nil {
+			log.Debugw("downloadImage-failed", log.Fields{"err": err, "imageName": img.Name})
+			res = err
+		}
+	} else {
+		res = status.Errorf(codes.NotFound, "%s", img.Id)
+	}
+	sendResponse(ctx, ch, res)
+}
+
+func (dMgr *DeviceManager) cancelImageDownload(ctx context.Context, img *voltha.ImageDownload, ch chan interface{}) {
+	log.Debugw("cancelImageDownload", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	var res interface{}
+	var err error
+	if agent := dMgr.getDeviceAgent(img.Id); agent != nil {
+		if res, err = agent.cancelImageDownload(ctx, img); err != nil {
+			log.Debugw("cancelImageDownload-failed", log.Fields{"err": err, "imageName": img.Name})
+			res = err
+		}
+	} else {
+		res = status.Errorf(codes.NotFound, "%s", img.Id)
+	}
+	sendResponse(ctx, ch, res)
+}
+
+func (dMgr *DeviceManager) activateImage(ctx context.Context, img *voltha.ImageDownload, ch chan interface{}) {
+	log.Debugw("activateImage", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	var res interface{}
+	var err error
+	if agent := dMgr.getDeviceAgent(img.Id); agent != nil {
+		if res, err = agent.activateImage(ctx, img); err != nil {
+			log.Debugw("activateImage-failed", log.Fields{"err": err, "imageName": img.Name})
+			res = err
+		}
+	} else {
+		res = status.Errorf(codes.NotFound, "%s", img.Id)
+	}
+	sendResponse(ctx, ch, res)
+}
+
+func (dMgr *DeviceManager) revertImage(ctx context.Context, img *voltha.ImageDownload, ch chan interface{}) {
+	log.Debugw("revertImage", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	var res interface{}
+	var err error
+	if agent := dMgr.getDeviceAgent(img.Id); agent != nil {
+		if res, err = agent.revertImage(ctx, img); err != nil {
+			log.Debugw("revertImage-failed", log.Fields{"err": err, "imageName": img.Name})
+			res = err
+		}
+	} else {
+		res = status.Errorf(codes.NotFound, "%s", img.Id)
+	}
+	sendResponse(ctx, ch, res)
+}
+
+func (dMgr *DeviceManager) getImageDownloadStatus(ctx context.Context, img *voltha.ImageDownload, ch chan interface{}) {
+	log.Debugw("getImageDownloadStatus", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	var res interface{}
+	var err error
+	if agent := dMgr.getDeviceAgent(img.Id); agent != nil {
+		if res, err = agent.getImageDownloadStatus(ctx, img); err != nil {
+			log.Debugw("getImageDownloadStatus-failed", log.Fields{"err": err, "imageName": img.Name})
+			res = err
+		}
+	} else {
+		res = status.Errorf(codes.NotFound, "%s", img.Id)
+	}
+	sendResponse(ctx, ch, res)
+}
+
+
+func (dMgr *DeviceManager) updateImageDownload(deviceId string, img *voltha.ImageDownload) error {
+	log.Debugw("updateImageDownload", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		if err := agent.updateImageDownload(img); err != nil {
+			log.Debugw("updateImageDownload-failed", log.Fields{"err": err, "imageName": img.Name})
+			return err
+		}
+	} else {
+		return status.Errorf(codes.NotFound, "%s", img.Id)
+	}
+	return nil
+}
+
+func (dMgr *DeviceManager) getImageDownload(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	log.Debugw("getImageDownload", log.Fields{"deviceid": img.Id, "imageName": img.Name})
+	if agent := dMgr.getDeviceAgent(img.Id); agent != nil {
+		return agent.getImageDownload(ctx, img)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", img.Id)
+}
+
+func (dMgr *DeviceManager) listImageDownloads(ctx context.Context, deviceId string) (*voltha.ImageDownloads, error) {
+	log.Debugw("listImageDownloads", log.Fields{"deviceId": deviceId})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.listImageDownloads(ctx, deviceId)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+}
+
+
 func (dMgr *DeviceManager) activateDevice(cDevice *voltha.Device) error {
 	log.Info("activateDevice")
 	return nil
diff --git a/rw_core/core/grpc_nbi_api_handler.go b/rw_core/core/grpc_nbi_api_handler.go
index d11c420..dd777c0 100644
--- a/rw_core/core/grpc_nbi_api_handler.go
+++ b/rw_core/core/grpc_nbi_api_handler.go
@@ -37,6 +37,13 @@
 
 const MAX_RESPONSE_TIME = 500 // milliseconds
 
+const (
+	IMAGE_DOWNLOAD = iota
+	CANCEL_IMAGE_DOWNLOAD     = iota
+	ACTIVATE_IMAGE = iota
+	REVERT_IMAGE = iota
+)
+
 type APIHandler struct {
 	deviceMgr        *DeviceManager
 	logicalDeviceMgr *LogicalDeviceManager
@@ -425,6 +432,67 @@
 	return waitForNilResponseOnSuccess(ctx, ch)
 }
 
+func (handler *APIHandler) acquireTransaction(ctx context.Context) (*KVTransaction, error) {
+	txn, err := handler.createKvTransaction(ctx)
+	if txn == nil {
+		return nil,  err
+	} else if txn.Acquired(MAX_RESPONSE_TIME) {
+		return txn, nil
+	} else {
+		txn.Close()
+		return nil, errors.New("failed-to-seize-request")
+	}
+}
+
+// processImageRequest is a helper method to execute an image download request
+func (handler *APIHandler) processImageRequest(ctx context.Context, img *voltha.ImageDownload, requestType int) (*common.OperationResp, error) {
+	log.Debugw("processImageDownload", log.Fields{"img": *img, "requestType": requestType})
+	if isTestMode(ctx) {
+		resp := &common.OperationResp{Code: common.OperationResp_OPERATION_SUCCESS}
+		return resp, nil
+	}
+
+	if txn, err := handler.acquireTransaction(ctx); err != nil {
+		return &common.OperationResp{}, err
+	} else {
+		defer txn.Close()
+	}
+
+	failedresponse := &common.OperationResp{Code:voltha.OperationResp_OPERATION_FAILURE}
+
+	ch := make(chan interface{})
+	defer close(ch)
+	switch requestType {
+	case IMAGE_DOWNLOAD:
+		go handler.deviceMgr.downloadImage(ctx, img, ch)
+	case CANCEL_IMAGE_DOWNLOAD:
+		go handler.deviceMgr.cancelImageDownload(ctx, img, ch)
+	case ACTIVATE_IMAGE:
+		go handler.deviceMgr.activateImage(ctx, img, ch)
+	case REVERT_IMAGE:
+		go handler.deviceMgr.revertImage(ctx, img, ch)
+	default:
+		log.Warn("invalid-request-type", log.Fields{"requestType": requestType})
+		return failedresponse, status.Errorf(codes.InvalidArgument, "%d", requestType)
+	}
+	select {
+	case res := <-ch:
+		if res != nil {
+			if err, ok := res.(error); ok {
+				return failedresponse, err
+			}
+			if opResp, ok := res.(*common.OperationResp); ok {
+				return opResp, nil
+			}
+		}
+		log.Warnw("download-image-unexpected-return-type", log.Fields{"result": res})
+		return failedresponse, status.Errorf(codes.Internal, "%s", res)
+	case <-ctx.Done():
+		log.Debug("downloadImage-client-timeout")
+		return nil, ctx.Err()
+	}
+}
+
 func (handler *APIHandler) DownloadImage(ctx context.Context, img *voltha.ImageDownload) (*common.OperationResp, error) {
 	log.Debugw("DownloadImage-request", log.Fields{"img": *img})
 	if isTestMode(ctx) {
@@ -432,36 +500,109 @@
 		return resp, nil
 	}
 
-	return nil, errors.New("UnImplemented")
+	return handler.processImageRequest(ctx, img, IMAGE_DOWNLOAD)
 }
 
 func (handler *APIHandler) CancelImageDownload(ctx context.Context, img *voltha.ImageDownload) (*common.OperationResp, error) {
-	log.Debugw("CancelImageDownload-request", log.Fields{"img": *img})
+	log.Debugw("cancelImageDownload-request", log.Fields{"img": *img})
 	if isTestMode(ctx) {
 		resp := &common.OperationResp{Code: common.OperationResp_OPERATION_SUCCESS}
 		return resp, nil
 	}
-	return nil, errors.New("UnImplemented")
+	return handler.processImageRequest(ctx, img, CANCEL_IMAGE_DOWNLOAD)
 }
 
 func (handler *APIHandler) ActivateImageUpdate(ctx context.Context, img *voltha.ImageDownload) (*common.OperationResp, error) {
-	log.Debugw("ActivateImageUpdate-request", log.Fields{"img": *img})
+	log.Debugw("activateImageUpdate-request", log.Fields{"img": *img})
 	if isTestMode(ctx) {
 		resp := &common.OperationResp{Code: common.OperationResp_OPERATION_SUCCESS}
 		return resp, nil
 	}
-	return nil, errors.New("UnImplemented")
+
+	return handler.processImageRequest(ctx, img, ACTIVATE_IMAGE)
 }
 
 func (handler *APIHandler) RevertImageUpdate(ctx context.Context, img *voltha.ImageDownload) (*common.OperationResp, error) {
-	log.Debugw("RevertImageUpdate-request", log.Fields{"img": *img})
+	log.Debugw("revertImageUpdate-request", log.Fields{"img": *img})
 	if isTestMode(ctx) {
 		resp := &common.OperationResp{Code: common.OperationResp_OPERATION_SUCCESS}
 		return resp, nil
 	}
-	return nil, errors.New("UnImplemented")
+
+	return handler.processImageRequest(ctx, img, REVERT_IMAGE)
 }
 
+func (handler *APIHandler) GetImageDownloadStatus(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	log.Debugw("getImageDownloadStatus-request", log.Fields{"img": *img})
+	if isTestMode(ctx) {
+		resp := &voltha.ImageDownload{State: voltha.ImageDownload_DOWNLOAD_SUCCEEDED}
+		return resp, nil
+	}
+
+	failedresponse := &voltha.ImageDownload{State: voltha.ImageDownload_DOWNLOAD_UNKNOWN}
+
+	if txn, err := handler.acquireTransaction(ctx); err != nil {
+		return  failedresponse, err
+	} else {
+		defer txn.Close()
+	}
+
+	ch := make(chan interface{})
+	defer close(ch)
+	go handler.deviceMgr.getImageDownloadStatus(ctx, img, ch)
+
+	select {
+	case res := <-ch:
+		if res != nil {
+			if err, ok := res.(error); ok {
+				return failedresponse, err
+			}
+			if downloadResp, ok := res.(*voltha.ImageDownload); ok {
+				return downloadResp, nil
+			}
+		}
+		log.Warnw("download-image-status", log.Fields{"result": res})
+		return failedresponse, status.Errorf(codes.Internal, "%s", res)
+	case <-ctx.Done():
+		log.Debug("downloadImage-client-timeout")
+		return failedresponse, ctx.Err()
+	}
+}
+
+func (handler *APIHandler) GetImageDownload(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownload-request", log.Fields{"img": *img})
+	if isTestMode(ctx) {
+		resp := &voltha.ImageDownload{State: voltha.ImageDownload_DOWNLOAD_SUCCEEDED}
+		return resp, nil
+	}
+
+	if download, err := handler.deviceMgr.getImageDownload(ctx, img); err != nil {
+		return &voltha.ImageDownload{State: voltha.ImageDownload_DOWNLOAD_UNKNOWN}, err
+	} else {
+		return download, nil
+	}
+}
+
+func (handler *APIHandler) ListImageDownloads(ctx context.Context, id *voltha.ID) (*voltha.ImageDownloads, error) {
+	log.Debugw("ListImageDownloads-request", log.Fields{"deviceId": id.Id})
+	if isTestMode(ctx) {
+		resp := &voltha.ImageDownloads{Items:[]*voltha.ImageDownload{}}
+		return resp, nil
+	}
+
+	if downloads, err := handler.deviceMgr.listImageDownloads(ctx, id.Id); err != nil {
+		failedResp := &voltha.ImageDownloads{
+			Items:[]*voltha.ImageDownload{
+				&voltha.ImageDownload{State: voltha.ImageDownload_DOWNLOAD_UNKNOWN},
+		},
+		}
+		return failedResp, err
+	} else {
+		return downloads, nil
+	}
+}
+
+
 func (handler *APIHandler) UpdateDevicePmConfigs(ctx context.Context, configs *voltha.PmConfigs) (*empty.Empty, error) {
 	log.Debugw("UpdateDevicePmConfigs-request", log.Fields{"configs": *configs})
 	if isTestMode(ctx) {
@@ -559,8 +700,7 @@
 			}
 		}
 	}
-	log.Debugw("ReceivePacketsIn-request-done", log.Fields{"packetsIn": packetsIn})
-	return nil
+	//TODO: FInd an elegant way to get out of the above loop when the Core is stopped
 }
 
 func (handler *APIHandler) sendChangeEvent(deviceId string, portStatus *openflow_13.OfpPortStatus) {
@@ -586,8 +726,8 @@
 			log.Errorw("Failed to send change event", log.Fields{"error": err})
 		}
 	}
-	return nil
-}
+	// TODO: put the packet in the queue
+	}
 
 func (handler *APIHandler) Subscribe(
 	ctx context.Context,