diff --git a/ro_core/core/core.go b/ro_core/core/core.go
new file mode 100644
index 0000000..0ba9b1b
--- /dev/null
+++ b/ro_core/core/core.go
@@ -0,0 +1,134 @@
+/*
+ * Copyright 2018-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 (
+	"context"
+	grpcserver "github.com/opencord/voltha-go/common/grpc"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/kvstore"
+	"github.com/opencord/voltha-go/db/model"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"github.com/opencord/voltha-go/ro_core/config"
+	"google.golang.org/grpc"
+)
+
+type Core struct {
+	instanceId        string
+	genericMgr        *ModelProxyManager
+	deviceMgr         *DeviceManager
+	logicalDeviceMgr  *LogicalDeviceManager
+	grpcServer        *grpcserver.GrpcServer
+	grpcNBIAPIHandler *APIHandler
+	config            *config.ROCoreFlags
+	clusterDataRoot   model.Root
+	localDataRoot     model.Root
+	clusterDataProxy  *model.Proxy
+	localDataProxy    *model.Proxy
+	exitChannel       chan int
+	kvClient          kvstore.Client
+}
+
+func init() {
+	log.AddPackage(log.JSON, log.DebugLevel, nil)
+}
+
+func NewCore(id string, cf *config.ROCoreFlags, kvClient kvstore.Client) *Core {
+	var core Core
+	core.instanceId = id
+	core.exitChannel = make(chan int, 1)
+	core.config = cf
+	core.kvClient = kvClient
+
+	// Setup the KV store
+	// Do not call NewBackend constructor; it creates its own KV client
+	// Commented the backend for now until the issue between the model and the KV store
+	// is resolved.
+	backend := model.Backend{
+		Client:     kvClient,
+		StoreType:  cf.KVStoreType,
+		Host:       cf.KVStoreHost,
+		Port:       cf.KVStorePort,
+		Timeout:    cf.KVStoreTimeout,
+		PathPrefix: "service/voltha"}
+	core.clusterDataRoot = model.NewRoot(&voltha.Voltha{}, &backend)
+	core.localDataRoot = model.NewRoot(&voltha.CoreInstance{}, &backend)
+	core.clusterDataProxy = core.clusterDataRoot.CreateProxy("/", false)
+	core.localDataProxy = core.localDataRoot.CreateProxy("/", false)
+	return &core
+}
+
+func (core *Core) Start(ctx context.Context) {
+	log.Info("starting-adaptercore", log.Fields{"coreId": core.instanceId})
+	core.genericMgr = newModelProxyManager(core.clusterDataProxy)
+	core.deviceMgr = newDeviceManager(core.clusterDataProxy, core.instanceId)
+	core.logicalDeviceMgr = newLogicalDeviceManager(core.deviceMgr, core.clusterDataProxy)
+	go core.startDeviceManager(ctx)
+	go core.startLogicalDeviceManager(ctx)
+	go core.startGRPCService(ctx)
+
+	log.Info("adaptercore-started")
+}
+
+func (core *Core) Stop(ctx context.Context) {
+	log.Info("stopping-adaptercore")
+	core.exitChannel <- 1
+	// Stop all the started services
+	core.grpcServer.Stop()
+	core.logicalDeviceMgr.stop(ctx)
+	core.deviceMgr.stop(ctx)
+	log.Info("adaptercore-stopped")
+}
+
+//startGRPCService creates the grpc service handlers, registers it to the grpc server
+// and starts the server
+func (core *Core) startGRPCService(ctx context.Context) {
+	//	create an insecure gserver server
+	core.grpcServer = grpcserver.NewGrpcServer(core.config.GrpcHost, core.config.GrpcPort, nil, false)
+	log.Info("grpc-server-created")
+
+	core.grpcNBIAPIHandler = NewAPIHandler(core.genericMgr, core.deviceMgr, core.logicalDeviceMgr)
+	core.logicalDeviceMgr.setGrpcNbiHandler(core.grpcNBIAPIHandler)
+	//	Create a function to register the core GRPC service with the GRPC server
+	f := func(gs *grpc.Server) {
+		voltha.RegisterVolthaServiceServer(
+			gs,
+			core.grpcNBIAPIHandler,
+		)
+	}
+
+	core.grpcServer.AddService(f)
+	log.Info("grpc-service-added")
+
+	//	Start the server
+	core.grpcServer.Start(context.Background())
+	log.Info("grpc-server-started")
+}
+
+func (core *Core) startDeviceManager(ctx context.Context) {
+	// TODO: Interaction between the logicaldevicemanager and devicemanager should mostly occur via
+	// callbacks.  For now, until the model is ready, devicemanager will keep a reference to the
+	// logicaldevicemanager to initiate the creation of logical devices
+	log.Info("starting-DeviceManager")
+	core.deviceMgr.start(ctx, core.logicalDeviceMgr)
+	log.Info("started-DeviceManager")
+}
+
+func (core *Core) startLogicalDeviceManager(ctx context.Context) {
+	log.Info("starting-Logical-DeviceManager")
+	core.logicalDeviceMgr.start(ctx)
+	log.Info("started-Logical-DeviceManager")
+}
diff --git a/ro_core/core/device_agent.go b/ro_core/core/device_agent.go
new file mode 100644
index 0000000..1ae1275
--- /dev/null
+++ b/ro_core/core/device_agent.go
@@ -0,0 +1,193 @@
+/*
+ * Copyright 2018-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 (
+	"context"
+	"github.com/gogo/protobuf/proto"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/model"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"sync"
+)
+
+type DeviceAgent struct {
+	deviceId         string
+	deviceType       string
+	lastData         *voltha.Device
+	deviceMgr        *DeviceManager
+	clusterDataProxy *model.Proxy
+	exitChannel      chan int
+	lockDevice       sync.RWMutex
+}
+
+//newDeviceAgent creates a new device agent along as creating a unique ID for the device and set the device state to
+//preprovisioning
+func newDeviceAgent(device *voltha.Device, deviceMgr *DeviceManager, cdProxy *model.Proxy) *DeviceAgent {
+	var agent DeviceAgent
+	agent.deviceId = device.Id
+	agent.deviceType = device.Type
+	agent.lastData = device
+	agent.deviceMgr = deviceMgr
+	agent.exitChannel = make(chan int, 1)
+	agent.clusterDataProxy = cdProxy
+	agent.lockDevice = sync.RWMutex{}
+	return &agent
+}
+
+// start save the device to the data model and registers for callbacks on that device
+func (agent *DeviceAgent) start(ctx context.Context) {
+	log.Debugw("starting-device-agent", log.Fields{"device": agent.lastData})
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debug("device-agent-started")
+}
+
+// stop stops the device agent.  Not much to do for now
+func (agent *DeviceAgent) stop(ctx context.Context) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	log.Debug("stopping-device-agent")
+	agent.exitChannel <- 1
+	log.Debug("device-agent-stopped")
+}
+
+// GetDevice retrieves the latest device information from the data model
+func (agent *DeviceAgent) getDevice() (*voltha.Device, error) {
+	agent.lockDevice.Lock()
+	defer agent.lockDevice.Unlock()
+	if device := agent.clusterDataProxy.Get("/devices/"+agent.deviceId, 1, false, ""); device != nil {
+		if d, ok := device.(*voltha.Device); ok {
+			cloned := proto.Clone(d).(*voltha.Device)
+			return cloned, nil
+		}
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// getDeviceWithoutLock is a helper function to be used ONLY by any device agent function AFTER it has acquired the device lock.
+// This function is meant so that we do not have duplicate code all over the device agent functions
+func (agent *DeviceAgent) getDeviceWithoutLock() (*voltha.Device, error) {
+	if device := agent.clusterDataProxy.Get("/devices/"+agent.deviceId, 1, false, ""); device != nil {
+		if d, ok := device.(*voltha.Device); ok {
+			cloned := proto.Clone(d).(*voltha.Device)
+			return cloned, nil
+		}
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// 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})
+	ports := &voltha.Ports{}
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		for _, port := range device.Ports {
+			if port.Type == portType {
+				ports.Items = append(ports.Items, port)
+			}
+		}
+	}
+	return ports
+}
+
+// ListDevicePorts retrieves the ports information for a particular device.
+func (agent *DeviceAgent) ListDevicePorts(ctx context.Context) (*voltha.Ports, error) {
+	log.Debugw("ListDevicePorts", log.Fields{"id": agent.deviceId})
+	ports := &voltha.Ports{}
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		for _, entry := range device.GetPorts() {
+			ports.Items = append(ports.Items, entry)
+		}
+		return ports, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// ListDevicePmConfigs retrieves the ports information for a particular device.
+func (agent *DeviceAgent) ListDevicePmConfigs(ctx context.Context) (*voltha.PmConfigs, error) {
+	log.Debugw("ListDevicePmConfigs", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		return device.GetPmConfigs(), nil
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// ListDeviceFlows retrieves the ports information for a particular device.
+func (agent *DeviceAgent) ListDeviceFlows(ctx context.Context) (*voltha.Flows, error) {
+	log.Debugw("ListDeviceFlows", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		return device.GetFlows(), nil
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// ListDeviceFlows retrieves the ports information for a particular device.
+func (agent *DeviceAgent) ListDeviceFlowGroups(ctx context.Context) (*voltha.FlowGroups, error) {
+	log.Debugw("ListDeviceFlowGroups", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		return device.GetFlowGroups(), nil
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// GetImageDownloadStatus retrieves the download status of an image of a particular device.
+func (agent *DeviceAgent) GetImageDownloadStatus(ctx context.Context, imageName string) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownloadStatus", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		for _, img := range device.GetImageDownloads() {
+			if img.GetName() == imageName {
+				return img, nil
+			}
+		}
+		return nil, status.Errorf(codes.NotFound, "device-%s, image-%s", agent.deviceId, imageName)
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// GetImageDownload retrieves the image download for a particular device.
+func (agent *DeviceAgent) GetImageDownload(ctx context.Context, imageName string) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownload", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		for _, img := range device.GetImageDownloads() {
+			if img.GetName() == imageName {
+				return img, nil
+			}
+		}
+		return nil, status.Errorf(codes.NotFound, "device-%s, image-%s", agent.deviceId, imageName)
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// ListImageDownloads retrieves the image downloads for a particular device.
+func (agent *DeviceAgent) ListImageDownloads(ctx context.Context) (*voltha.ImageDownloads, error) {
+	log.Debugw("ListImageDownloads", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		return &voltha.ImageDownloads{Items: device.GetImageDownloads()}, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
+
+// GetImages retrieves the list of images for a particular device.
+func (agent *DeviceAgent) GetImages(ctx context.Context) (*voltha.Images, error) {
+	log.Debugw("GetImages", log.Fields{"id": agent.deviceId})
+	if device, _ := agent.deviceMgr.GetDevice(agent.deviceId); device != nil {
+		return device.GetImages(), nil
+	}
+	return nil, status.Errorf(codes.NotFound, "device-%s", agent.deviceId)
+}
\ No newline at end of file
diff --git a/ro_core/core/device_manager.go b/ro_core/core/device_manager.go
new file mode 100644
index 0000000..1851e27
--- /dev/null
+++ b/ro_core/core/device_manager.go
@@ -0,0 +1,268 @@
+/*
+ * Copyright 2018-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 (
+	"context"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/model"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"sync"
+)
+
+type DeviceManager struct {
+	deviceAgents        map[string]*DeviceAgent
+	logicalDeviceMgr    *LogicalDeviceManager
+	clusterDataProxy    *model.Proxy
+	coreInstanceId      string
+	exitChannel         chan int
+	lockDeviceAgentsMap sync.RWMutex
+}
+
+func newDeviceManager(cdProxy *model.Proxy, coreInstanceId string) *DeviceManager {
+	var deviceMgr DeviceManager
+	deviceMgr.exitChannel = make(chan int, 1)
+	deviceMgr.deviceAgents = make(map[string]*DeviceAgent)
+	deviceMgr.coreInstanceId = coreInstanceId
+	deviceMgr.clusterDataProxy = cdProxy
+	deviceMgr.lockDeviceAgentsMap = sync.RWMutex{}
+	return &deviceMgr
+}
+
+func (dMgr *DeviceManager) start(ctx context.Context, logicalDeviceMgr *LogicalDeviceManager) {
+	log.Info("starting-device-manager")
+	dMgr.logicalDeviceMgr = logicalDeviceMgr
+	log.Info("device-manager-started")
+}
+
+func (dMgr *DeviceManager) stop(ctx context.Context) {
+	log.Info("stopping-device-manager")
+	dMgr.exitChannel <- 1
+	log.Info("device-manager-stopped")
+}
+
+func sendResponse(ctx context.Context, ch chan interface{}, result interface{}) {
+	if ctx.Err() == nil {
+		// Returned response only of the ctx has not been cancelled/timeout/etc
+		// Channel is automatically closed when a context is Done
+		ch <- result
+		log.Debugw("sendResponse", log.Fields{"result": result})
+	} else {
+		// Should the transaction be reverted back?
+		log.Debugw("sendResponse-context-error", log.Fields{"context-error": ctx.Err()})
+	}
+}
+
+func (dMgr *DeviceManager) addDeviceAgentToMap(agent *DeviceAgent) {
+	dMgr.lockDeviceAgentsMap.Lock()
+	defer dMgr.lockDeviceAgentsMap.Unlock()
+	if _, exist := dMgr.deviceAgents[agent.deviceId]; !exist {
+		dMgr.deviceAgents[agent.deviceId] = agent
+	}
+}
+
+func (dMgr *DeviceManager) deleteDeviceAgentToMap(agent *DeviceAgent) {
+	dMgr.lockDeviceAgentsMap.Lock()
+	defer dMgr.lockDeviceAgentsMap.Unlock()
+	delete(dMgr.deviceAgents, agent.deviceId)
+}
+
+func (dMgr *DeviceManager) getDeviceAgent(deviceId string) *DeviceAgent {
+	// TODO If the device is not in memory it needs to be loaded first
+	dMgr.lockDeviceAgentsMap.Lock()
+	defer dMgr.lockDeviceAgentsMap.Unlock()
+	if agent, ok := dMgr.deviceAgents[deviceId]; ok {
+		return agent
+	}
+	return nil
+}
+
+func (dMgr *DeviceManager) listDeviceIdsFromMap() *voltha.IDs {
+	dMgr.lockDeviceAgentsMap.Lock()
+	defer dMgr.lockDeviceAgentsMap.Unlock()
+	result := &voltha.IDs{Items: make([]*voltha.ID, 0)}
+	for key, _ := range dMgr.deviceAgents {
+		result.Items = append(result.Items, &voltha.ID{Id: key})
+	}
+	return result
+}
+
+func (dMgr *DeviceManager) GetDevice(id string) (*voltha.Device, error) {
+	log.Debugw("GetDevice", log.Fields{"deviceid": id})
+	if agent := dMgr.getDeviceAgent(id); agent != nil {
+		return agent.getDevice()
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", id)
+}
+
+func (dMgr *DeviceManager) IsRootDevice(id string) (bool, error) {
+	device, err := dMgr.GetDevice(id)
+	if err != nil {
+		return false, err
+	}
+	return device.Root, nil
+}
+
+// GetDevice retrieves the latest device information from the data model
+func (dMgr *DeviceManager) ListDevices() (*voltha.Devices, error) {
+	log.Debug("ListDevices")
+	result := &voltha.Devices{}
+	if devices := dMgr.clusterDataProxy.Get("/devices", 0, false, ""); devices != nil {
+		for _, device := range devices.([]interface{}) {
+			if agent := dMgr.getDeviceAgent(device.(*voltha.Device).Id); agent == nil {
+				agent = newDeviceAgent(device.(*voltha.Device), dMgr, dMgr.clusterDataProxy)
+				dMgr.addDeviceAgentToMap(agent)
+				agent.start(nil)
+			}
+			result.Items = append(result.Items, device.(*voltha.Device))
+		}
+	}
+	return result, nil
+}
+
+// ListDeviceIds retrieves the latest device IDs information from the data model (memory data only)
+func (dMgr *DeviceManager) ListDeviceIds() (*voltha.IDs, error) {
+	log.Debug("ListDeviceIDs")
+	// Report only device IDs that are in the device agent map
+	return dMgr.listDeviceIdsFromMap(), nil
+}
+
+//ReconcileDevices is a request to a voltha core to managed a list of devices based on their IDs
+func (dMgr *DeviceManager) ReconcileDevices(ctx context.Context, ids *voltha.IDs, ch chan interface{}) {
+	log.Debug("ReconcileDevices")
+	var res interface{}
+	if ids != nil {
+		toReconcile := len(ids.Items)
+		reconciled := 0
+		for _, id := range ids.Items {
+			//	 Act on the device only if its not present in the agent map
+			if agent := dMgr.getDeviceAgent(id.Id); agent == nil {
+				//	Device Id not in memory
+				log.Debugw("reconciling-device", log.Fields{"id": id.Id})
+				// Load device from model
+				if device := dMgr.clusterDataProxy.Get("/devices/"+id.Id, 0, false, ""); device != nil {
+					agent = newDeviceAgent(device.(*voltha.Device), dMgr, dMgr.clusterDataProxy)
+					dMgr.addDeviceAgentToMap(agent)
+					agent.start(nil)
+					reconciled += 1
+				} else {
+					log.Warnw("device-inexistent", log.Fields{"id": id.Id})
+				}
+			} else {
+				reconciled += 1
+			}
+		}
+		if toReconcile != reconciled {
+			res = status.Errorf(codes.DataLoss, "less-device-reconciled:%d/%d", reconciled, toReconcile)
+		}
+	} else {
+		res = status.Errorf(codes.InvalidArgument, "empty-list-of-ids")
+	}
+	sendResponse(ctx, ch, res)
+}
+
+func (dMgr *DeviceManager) getPorts(ctx context.Context, deviceId string, portType voltha.Port_PortType) (*voltha.Ports, error) {
+	log.Debugw("getPorts", log.Fields{"deviceid": deviceId, "portType": portType})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.getPorts(ctx, portType), nil
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) ListDevicePorts(ctx context.Context, deviceId string) (*voltha.Ports, error) {
+	log.Debugw("ListDevicePorts", log.Fields{"deviceid": deviceId})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.ListDevicePorts(ctx)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) ListDevicePmConfigs(ctx context.Context, deviceId string) (*voltha.PmConfigs, error) {
+	log.Debugw("ListDevicePmConfigs", log.Fields{"deviceid": deviceId})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.ListDevicePmConfigs(ctx)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) ListDeviceFlows(ctx context.Context, deviceId string) (*voltha.Flows, error) {
+	log.Debugw("ListDeviceFlows", log.Fields{"deviceid": deviceId})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.ListDeviceFlows(ctx)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) ListDeviceFlowGroups(ctx context.Context, deviceId string) (*voltha.FlowGroups, error) {
+	log.Debugw("ListDeviceFlowGroups", log.Fields{"deviceid": deviceId})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.ListDeviceFlowGroups(ctx)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) GetImageDownloadStatus(ctx context.Context, deviceId string, imageName string) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownloadStatus", log.Fields{"deviceid": deviceId, "imagename": imageName})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.GetImageDownloadStatus(ctx, imageName)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) GetImageDownload(ctx context.Context, deviceId string, imageName string) ( *voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownload", log.Fields{"deviceid": deviceId, "imagename": imageName})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.GetImageDownload(ctx, imageName)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+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)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) GetImages(ctx context.Context, deviceId string) ( *voltha.Images, error) {
+	log.Debugw("GetImages", log.Fields{"deviceid": deviceId})
+	if agent := dMgr.getDeviceAgent(deviceId); agent != nil {
+		return agent.GetImages(ctx)
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", deviceId)
+
+}
+
+func (dMgr *DeviceManager) getParentDevice(childDevice *voltha.Device) *voltha.Device {
+	//	Sanity check
+	if childDevice.Root {
+		// childDevice is the parent device
+		return childDevice
+	}
+	parentDevice, _ := dMgr.GetDevice(childDevice.ParentId)
+	return parentDevice
+}
diff --git a/ro_core/core/grpc_nbi_api_handler.go b/ro_core/core/grpc_nbi_api_handler.go
new file mode 100644
index 0000000..5727983
--- /dev/null
+++ b/ro_core/core/grpc_nbi_api_handler.go
@@ -0,0 +1,254 @@
+/*
+ * Copyright 2018-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 (
+	"context"
+	"errors"
+	"github.com/golang/protobuf/ptypes/empty"
+	da "github.com/opencord/voltha-go/common/core/northbound/grpc"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/protos/common"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+)
+
+type APIHandler struct {
+	commonMgr        *ModelProxyManager
+	deviceMgr        *DeviceManager
+	logicalDeviceMgr *LogicalDeviceManager
+	da.DefaultAPIHandler
+}
+
+func NewAPIHandler(generalMgr *ModelProxyManager, deviceMgr *DeviceManager, lDeviceMgr *LogicalDeviceManager) *APIHandler {
+	handler := &APIHandler{
+		commonMgr:        generalMgr,
+		deviceMgr:        deviceMgr,
+		logicalDeviceMgr: lDeviceMgr,
+	}
+	return handler
+}
+
+// isTestMode is a helper function to determine a function is invoked for testing only
+func isTestMode(ctx context.Context) bool {
+	md, _ := metadata.FromIncomingContext(ctx)
+	_, exist := md[common.TestModeKeys_api_test.String()]
+	return exist
+}
+
+// waitForNilResponseOnSuccess is a helper function to wait for a response on channel ch where an nil
+// response is expected in a successful scenario
+func waitForNilResponseOnSuccess(ctx context.Context, ch chan interface{}) (*empty.Empty, error) {
+	select {
+	case res := <-ch:
+		if res == nil {
+			return new(empty.Empty), nil
+		} else if err, ok := res.(error); ok {
+			return new(empty.Empty), err
+		} else {
+			log.Warnw("unexpected-return-type", log.Fields{"result": res})
+			err = status.Errorf(codes.Internal, "%s", res)
+			return new(empty.Empty), err
+		}
+	case <-ctx.Done():
+		log.Debug("client-timeout")
+		return nil, ctx.Err()
+	}
+}
+
+// GetVoltha returns the contents of all components (i.e. devices, logical_devices, ...)
+func (handler *APIHandler) GetVoltha(ctx context.Context, empty *empty.Empty) (*voltha.Voltha, error) {
+	log.Debug("GetVoltha")
+	return handler.commonMgr.GetVoltha(ctx)
+}
+
+// ListCoreInstances returns details on the running core containers
+func (handler *APIHandler) ListCoreInstances(ctx context.Context, empty *empty.Empty) (*voltha.CoreInstances, error) {
+	log.Debug("ListCoreInstances")
+	return handler.commonMgr.ListCoreInstances(ctx)
+}
+
+// GetCoreInstance returns the details of a specific core container
+func (handler *APIHandler) GetCoreInstance(ctx context.Context, id *voltha.ID) (*voltha.CoreInstance, error) {
+	log.Debugw("GetCoreInstance", log.Fields{"id": id})
+	return handler.commonMgr.GetCoreInstance(ctx, id.Id)
+}
+
+// ListAdapters returns the contents of all adapters known to the system
+func (handler *APIHandler) ListAdapters(ctx context.Context, empty *empty.Empty) (*voltha.Adapters, error) {
+	log.Debug("ListDevices")
+	return handler.commonMgr.ListAdapters(ctx)
+}
+
+// GetDevice returns the details a specific device
+func (handler *APIHandler) GetDevice(ctx context.Context, id *voltha.ID) (*voltha.Device, error) {
+	log.Debugw("GetDevice-request", log.Fields{"id": id})
+	return handler.deviceMgr.GetDevice(id.Id)
+}
+
+// ListDevices returns the contents of all devices known to the system
+func (handler *APIHandler) ListDevices(ctx context.Context, empty *empty.Empty) (*voltha.Devices, error) {
+	log.Debug("ListDevices")
+	return handler.deviceMgr.ListDevices()
+}
+
+// ListDeviceIds returns the list of device ids managed by a voltha core
+func (handler *APIHandler) ListDeviceIds(ctx context.Context, empty *empty.Empty) (*voltha.IDs, error) {
+	log.Debug("ListDeviceIDs")
+	if isTestMode(ctx) {
+		out := &voltha.IDs{Items: make([]*voltha.ID, 0)}
+		return out, nil
+	}
+	return handler.deviceMgr.ListDeviceIds()
+}
+
+// ListDevicePorts returns the ports details for a specific device entry
+func (handler *APIHandler) ListDevicePorts(ctx context.Context, id *voltha.ID) (*voltha.Ports, error) {
+	log.Debugw("ListDevicePorts", log.Fields{"deviceid": id})
+	return handler.deviceMgr.ListDevicePorts(ctx, id.Id)
+}
+
+// ListDevicePmConfigs returns the PM config details for a specific device entry
+func (handler *APIHandler) ListDevicePmConfigs(ctx context.Context, id *voltha.ID) (*voltha.PmConfigs, error) {
+	log.Debugw("ListDevicePmConfigs", log.Fields{"deviceid": id})
+	return handler.deviceMgr.ListDevicePmConfigs(ctx, id.Id)
+}
+
+// ListDeviceFlows returns the flow details for a specific device entry
+func (handler *APIHandler) ListDeviceFlows(ctx context.Context, id *voltha.ID) (*voltha.Flows, error) {
+	log.Debugw("ListDeviceFlows", log.Fields{"deviceid": id})
+	return handler.deviceMgr.ListDeviceFlows(ctx, id.Id)
+}
+
+// ListDeviceFlowGroups returns the flow group details for a specific device entry
+func (handler *APIHandler) ListDeviceFlowGroups(ctx context.Context, id *voltha.ID) (*voltha.FlowGroups, error) {
+	log.Debugw("ListDeviceFlowGroups", log.Fields{"deviceid": id})
+	return handler.deviceMgr.ListDeviceFlowGroups(ctx, id.Id)
+}
+
+// ListDeviceTypes returns all the device types known to the system
+func (handler *APIHandler) ListDeviceTypes(ctx context.Context, empty *empty.Empty) (*voltha.DeviceTypes, error) {
+	log.Debug("ListDeviceTypes")
+	return handler.commonMgr.ListDeviceTypes(ctx)
+}
+
+// GetDeviceType returns the device type for a specific device entry
+func (handler *APIHandler) GetDeviceType(ctx context.Context, id *voltha.ID) (*voltha.DeviceType, error) {
+	log.Debugw("GetDeviceType", log.Fields{"typeid": id})
+	return handler.commonMgr.GetDeviceType(ctx, id.Id)
+}
+
+// ListDeviceGroups returns all the device groups known to the system
+func (handler *APIHandler) ListDeviceGroups(ctx context.Context, empty *empty.Empty) (*voltha.DeviceGroups, error) {
+	log.Debug("ListDeviceGroups")
+	return handler.commonMgr.ListDeviceGroups(ctx)
+}
+
+// GetDeviceGroup returns a specific device group entry
+func (handler *APIHandler) GetDeviceGroup(ctx context.Context, id *voltha.ID) (*voltha.DeviceGroup, error) {
+	log.Debugw("GetDeviceGroup", log.Fields{"groupid": id})
+	return handler.commonMgr.GetDeviceGroup(ctx, id.Id)
+}
+
+// GetImageDownloadStatus returns the download status for a specific image entry
+func (handler *APIHandler) GetImageDownloadStatus(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownloadStatus", log.Fields{"deviceid": img.GetId(), "imagename": img.GetName()})
+	return handler.deviceMgr.GetImageDownloadStatus(ctx, img.GetId(), img.GetName())
+}
+
+// GetImageDownload return the download details for a specific image entry
+func (handler *APIHandler) GetImageDownload(ctx context.Context, img *voltha.ImageDownload) (*voltha.ImageDownload, error) {
+	log.Debugw("GetImageDownload", log.Fields{"deviceid": img.GetId(), "imagename": img.GetName()})
+	return handler.deviceMgr.GetImageDownload(ctx, img.GetId(), img.GetName())
+}
+
+// ListImageDownloads returns all image downloads known to the system
+func (handler *APIHandler) ListImageDownloads(ctx context.Context, id *voltha.ID) (*voltha.ImageDownloads, error) {
+	log.Debugw("GetImageDownload", log.Fields{"deviceid": id})
+	return handler.deviceMgr.ListImageDownloads(ctx, id.Id)
+}
+
+// GetImages returns all images for a specific device entry
+func (handler *APIHandler) GetImages(ctx context.Context, id *voltha.ID) (*voltha.Images, error) {
+	log.Debugw("GetImages", log.Fields{"deviceid": id})
+	return handler.deviceMgr.GetImages(ctx, id.Id)
+}
+
+// ListAlarmFilters return all alarm filters known to the system
+func (handler *APIHandler) ListAlarmFilters(ctx context.Context, empty *empty.Empty) (*voltha.AlarmFilters, error) {
+	log.Debug("ListAlarmFilters")
+	return handler.commonMgr.ListAlarmFilters(ctx)
+}
+
+// GetAlarmFilter returns a specific alarm filter entry
+func (handler *APIHandler) GetAlarmFilter(ctx context.Context, id *voltha.ID) (*voltha.AlarmFilter, error) {
+	log.Debugw("GetAlarmFilter", log.Fields{"alarmid": id})
+	return handler.commonMgr.GetAlarmFilter(ctx, id.Id)
+}
+
+//ReconcileDevices is a request to a voltha core to managed a list of devices  based on their IDs
+func (handler *APIHandler) ReconcileDevices(ctx context.Context, ids *voltha.IDs) (*empty.Empty, error) {
+	log.Debug("ReconcileDevices")
+	if isTestMode(ctx) {
+		out := new(empty.Empty)
+		return out, nil
+	}
+	ch := make(chan interface{})
+	defer close(ch)
+	go handler.deviceMgr.ReconcileDevices(ctx, ids, ch)
+	return waitForNilResponseOnSuccess(ctx, ch)
+}
+
+// GetLogicalDevice returns the details for a specific logical device entry
+func (handler *APIHandler) GetLogicalDevice(ctx context.Context, id *voltha.ID) (*voltha.LogicalDevice, error) {
+	log.Debugw("GetLogicalDevice-request", log.Fields{"id": id})
+	return handler.logicalDeviceMgr.getLogicalDevice(id.Id)
+}
+
+// ListLogicalDevices returns all logical devices known to the system
+func (handler *APIHandler) ListLogicalDevices(ctx context.Context, empty *empty.Empty) (*voltha.LogicalDevices, error) {
+	log.Debug("ListLogicalDevices")
+	return handler.logicalDeviceMgr.listLogicalDevices()
+}
+
+// ListLogicalDevicePorts returns port details for a specific logical device entry
+func (handler *APIHandler) ListLogicalDevicePorts(ctx context.Context, id *voltha.ID) (*voltha.LogicalPorts, error) {
+	log.Debugw("ListLogicalDevicePorts", log.Fields{"logicaldeviceid": id})
+	return handler.logicalDeviceMgr.ListLogicalDevicePorts(ctx, id.Id)
+}
+
+// ListLogicalDeviceFlows returns flow details for a specific logical device entry
+func (handler *APIHandler) ListLogicalDeviceFlows(ctx context.Context, id *voltha.ID) (*voltha.Flows, error) {
+	log.Debugw("ListLogicalDeviceFlows", log.Fields{"logicaldeviceid": id})
+	return handler.logicalDeviceMgr.ListLogicalDeviceFlows(ctx, id.Id)
+}
+
+// ListLogicalDeviceFlowGroups returns flow group details for a specific logical device entry
+func (handler *APIHandler) ListLogicalDeviceFlowGroups(ctx context.Context, id *voltha.ID) (*voltha.FlowGroups, error) {
+	log.Debugw("ListLogicalDeviceFlows", log.Fields{"logicaldeviceid": id})
+	return handler.logicalDeviceMgr.ListLogicalDeviceFlowGroups(ctx, id.Id)
+}
+
+func (handler *APIHandler) SelfTest(ctx context.Context, id *voltha.ID) (*voltha.SelfTestResponse, error) {
+	log.Debugw("SelfTest-request", log.Fields{"id": id})
+	if isTestMode(ctx) {
+		resp := &voltha.SelfTestResponse{Result: voltha.SelfTestResponse_SUCCESS}
+		return resp, nil
+	}
+	return nil, errors.New("UnImplemented")
+}
diff --git a/ro_core/core/logical_device_agent.go b/ro_core/core/logical_device_agent.go
new file mode 100644
index 0000000..9cb6655
--- /dev/null
+++ b/ro_core/core/logical_device_agent.go
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2018-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 (
+	"context"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/model"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"sync"
+)
+
+type LogicalDeviceAgent struct {
+	logicalDeviceId   string
+	lastData          *voltha.LogicalDevice
+	rootDeviceId      string
+	deviceMgr         *DeviceManager
+	ldeviceMgr        *LogicalDeviceManager
+	clusterDataProxy  *model.Proxy
+	exitChannel       chan int
+	lockLogicalDevice sync.RWMutex
+}
+
+func newLogicalDeviceAgent(id string, deviceId string, ldeviceMgr *LogicalDeviceManager, deviceMgr *DeviceManager, cdProxy *model.Proxy) *LogicalDeviceAgent {
+	var agent LogicalDeviceAgent
+	agent.exitChannel = make(chan int, 1)
+	agent.logicalDeviceId = id
+	agent.rootDeviceId = deviceId
+	agent.deviceMgr = deviceMgr
+	agent.clusterDataProxy = cdProxy
+	agent.ldeviceMgr = ldeviceMgr
+	agent.lockLogicalDevice = sync.RWMutex{}
+	return &agent
+}
+
+// start creates the logical device and add it to the data model
+func (agent *LogicalDeviceAgent) start(ctx context.Context) error {
+	log.Infow("starting-logical_device-agent", log.Fields{"logicaldeviceId": agent.logicalDeviceId})
+	agent.lockLogicalDevice.Lock()
+	defer agent.lockLogicalDevice.Unlock()
+	log.Info("logical_device-agent-started")
+	return nil
+}
+
+// stop terminates the logical device agent.
+func (agent *LogicalDeviceAgent) stop(ctx context.Context) {
+	log.Info("stopping-logical_device-agent")
+	agent.lockLogicalDevice.Lock()
+	defer agent.lockLogicalDevice.Unlock()
+	//Remove the logical device from the model
+	agent.exitChannel <- 1
+	log.Info("logical_device-agent-stopped")
+}
+
+// GetLogicalDevice locks the logical device model and then retrieves the latest logical device information
+func (agent *LogicalDeviceAgent) GetLogicalDevice() (*voltha.LogicalDevice, error) {
+	log.Debug("GetLogicalDevice")
+	agent.lockLogicalDevice.Lock()
+	defer agent.lockLogicalDevice.Unlock()
+	logicalDevice := agent.clusterDataProxy.Get("/logical_devices/"+agent.logicalDeviceId, 1, false, "")
+	if lDevice, ok := logicalDevice.(*voltha.LogicalDevice); ok {
+		return lDevice, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "logical_device-%s", agent.logicalDeviceId)
+}
+
+func (agent *LogicalDeviceAgent) ListLogicalDevicePorts() (*voltha.LogicalPorts, error) {
+	log.Debug("!!!!!ListLogicalDevicePorts")
+	agent.lockLogicalDevice.Lock()
+	defer agent.lockLogicalDevice.Unlock()
+	logicalDevice := agent.clusterDataProxy.Get("/logical_devices/"+agent.logicalDeviceId, 1, false, "")
+	if lDevice, ok := logicalDevice.(*voltha.LogicalDevice); ok {
+		lPorts := make([]*voltha.LogicalPort, 0)
+		for _, port := range lDevice.Ports {
+			lPorts = append(lPorts, port)
+		}
+		return &voltha.LogicalPorts{Items: lPorts}, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "logical_device-%s", agent.logicalDeviceId)
+}
+
+// listFlows locks the logical device model and then retrieves the latest flow information
+func (agent *LogicalDeviceAgent) ListLogicalDeviceFlows() (*voltha.Flows, error) {
+	log.Debug("listFlows")
+	agent.lockLogicalDevice.Lock()
+	defer agent.lockLogicalDevice.Unlock()
+	logicalDevice := agent.clusterDataProxy.Get("/logical_devices/"+agent.logicalDeviceId+"/flows", 1, false, "")
+	if lDevice, ok := logicalDevice.(*voltha.LogicalDevice); ok {
+		return lDevice.Flows, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "logical_device-%s", agent.logicalDeviceId)
+}
+
+// listFlowGroups locks the logical device model and then retrieves the latest flow groups information
+func (agent *LogicalDeviceAgent) ListLogicalDeviceFlowGroups() (*voltha.FlowGroups, error) {
+	log.Debug("listFlowGroups")
+	agent.lockLogicalDevice.Lock()
+	defer agent.lockLogicalDevice.Unlock()
+	logicalDevice := agent.clusterDataProxy.Get("/logical_devices/"+agent.logicalDeviceId, 1, false, "")
+	if lDevice, ok := logicalDevice.(*voltha.LogicalDevice); ok {
+		return lDevice.FlowGroups, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "logical_device-%s", agent.logicalDeviceId)
+}
diff --git a/ro_core/core/logical_device_manager.go b/ro_core/core/logical_device_manager.go
new file mode 100644
index 0000000..64ccf28
--- /dev/null
+++ b/ro_core/core/logical_device_manager.go
@@ -0,0 +1,191 @@
+/*
+ * Copyright 2018-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 (
+	"context"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/model"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"sync"
+)
+
+type LogicalDeviceManager struct {
+	logicalDeviceAgents        map[string]*LogicalDeviceAgent
+	deviceMgr                  *DeviceManager
+	grpcNbiHdlr                *APIHandler
+	clusterDataProxy           *model.Proxy
+	exitChannel                chan int
+	lockLogicalDeviceAgentsMap sync.RWMutex
+}
+
+func newLogicalDeviceManager(deviceMgr *DeviceManager, cdProxy *model.Proxy) *LogicalDeviceManager {
+	var logicalDeviceMgr LogicalDeviceManager
+	logicalDeviceMgr.exitChannel = make(chan int, 1)
+	logicalDeviceMgr.logicalDeviceAgents = make(map[string]*LogicalDeviceAgent)
+	logicalDeviceMgr.deviceMgr = deviceMgr
+	logicalDeviceMgr.clusterDataProxy = cdProxy
+	logicalDeviceMgr.lockLogicalDeviceAgentsMap = sync.RWMutex{}
+	return &logicalDeviceMgr
+}
+
+func (ldMgr *LogicalDeviceManager) setGrpcNbiHandler(grpcNbiHandler *APIHandler) {
+	ldMgr.grpcNbiHdlr = grpcNbiHandler
+}
+
+func (ldMgr *LogicalDeviceManager) start(ctx context.Context) {
+	log.Info("starting-logical-device-manager")
+	log.Info("logical-device-manager-started")
+}
+
+func (ldMgr *LogicalDeviceManager) stop(ctx context.Context) {
+	log.Info("stopping-logical-device-manager")
+	ldMgr.exitChannel <- 1
+	log.Info("logical-device-manager-stopped")
+}
+
+func (ldMgr *LogicalDeviceManager) addLogicalDeviceAgentToMap(agent *LogicalDeviceAgent) {
+	ldMgr.lockLogicalDeviceAgentsMap.Lock()
+	defer ldMgr.lockLogicalDeviceAgentsMap.Unlock()
+	if _, exist := ldMgr.logicalDeviceAgents[agent.logicalDeviceId]; !exist {
+		ldMgr.logicalDeviceAgents[agent.logicalDeviceId] = agent
+	}
+}
+
+func (ldMgr *LogicalDeviceManager) getLogicalDeviceAgent(logicalDeviceId string) *LogicalDeviceAgent {
+	ldMgr.lockLogicalDeviceAgentsMap.Lock()
+	defer ldMgr.lockLogicalDeviceAgentsMap.Unlock()
+	if agent, ok := ldMgr.logicalDeviceAgents[logicalDeviceId]; ok {
+		return agent
+	}
+	return nil
+}
+
+func (ldMgr *LogicalDeviceManager) deleteLogicalDeviceAgent(logicalDeviceId string) {
+	ldMgr.lockLogicalDeviceAgentsMap.Lock()
+	defer ldMgr.lockLogicalDeviceAgentsMap.Unlock()
+	delete(ldMgr.logicalDeviceAgents, logicalDeviceId)
+}
+
+// GetLogicalDevice provides a cloned most up to date logical device
+func (ldMgr *LogicalDeviceManager) getLogicalDevice(id string) (*voltha.LogicalDevice, error) {
+	log.Debugw("getlogicalDevice", log.Fields{"logicaldeviceid": id})
+	if agent := ldMgr.getLogicalDeviceAgent(id); agent != nil {
+		return agent.GetLogicalDevice()
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", id)
+}
+
+func (ldMgr *LogicalDeviceManager) listLogicalDevices() (*voltha.LogicalDevices, error) {
+	log.Debug("ListAllLogicalDevices")
+	result := &voltha.LogicalDevices{}
+	if logicalDevices := ldMgr.clusterDataProxy.Get("/logical_devices", 0, false, ""); logicalDevices != nil {
+		for _, logicalDevice := range logicalDevices.([]interface{}) {
+			if agent := ldMgr.getLogicalDeviceAgent(logicalDevice.(*voltha.LogicalDevice).Id); agent == nil {
+				agent = newLogicalDeviceAgent(
+					logicalDevice.(*voltha.LogicalDevice).Id,
+					logicalDevice.(*voltha.LogicalDevice).RootDeviceId,
+					ldMgr,
+					ldMgr.deviceMgr,
+					ldMgr.clusterDataProxy,
+				)
+				ldMgr.addLogicalDeviceAgentToMap(agent)
+				go agent.start(nil)
+			}
+			result.Items = append(result.Items, logicalDevice.(*voltha.LogicalDevice))
+		}
+	}
+	return result, nil
+}
+
+func (ldMgr *LogicalDeviceManager) getLogicalDeviceId(device *voltha.Device) (*string, error) {
+	// Device can either be a parent or a child device
+	if device.Root {
+		// Parent device.  The ID of a parent device is the logical device ID
+		return &device.ParentId, nil
+	}
+	// Device is child device
+	//	retrieve parent device using child device ID
+	if parentDevice := ldMgr.deviceMgr.getParentDevice(device); parentDevice != nil {
+		return &parentDevice.ParentId, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", device.Id)
+}
+
+func (ldMgr *LogicalDeviceManager) getLogicalPortId(device *voltha.Device) (*voltha.LogicalPortId, error) {
+	// Get the logical device where this device is attached
+	var lDeviceId *string
+	var err error
+	if lDeviceId, err = ldMgr.getLogicalDeviceId(device); err != nil {
+		return nil, err
+	}
+	var lDevice *voltha.LogicalDevice
+	if lDevice, err = ldMgr.getLogicalDevice(*lDeviceId); err != nil {
+		return nil, err
+	}
+	// Go over list of ports
+	for _, port := range lDevice.Ports {
+		if port.DeviceId == device.Id {
+			return &voltha.LogicalPortId{Id: *lDeviceId, PortId: port.Id}, nil
+		}
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", device.Id)
+}
+
+func (ldMgr *LogicalDeviceManager) ListLogicalDevicePorts(ctx context.Context, id string) (*voltha.LogicalPorts, error) {
+	log.Debugw("ListLogicalDevicePorts", log.Fields{"logicaldeviceid": id})
+	if agent := ldMgr.getLogicalDeviceAgent(id); agent != nil {
+		return agent.ListLogicalDevicePorts()
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", id)
+
+}
+
+func (ldMgr *LogicalDeviceManager) ListLogicalDeviceFlows(ctx context.Context, id string) (*voltha.Flows, error) {
+	log.Debugw("ListLogicalDeviceFlows", log.Fields{"logicaldeviceid": id})
+	if agent := ldMgr.getLogicalDeviceAgent(id); agent != nil {
+		return agent.ListLogicalDeviceFlows()
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", id)
+
+}
+
+func (ldMgr *LogicalDeviceManager) ListLogicalDeviceFlowGroups(ctx context.Context, id string) (*voltha.FlowGroups, error) {
+	log.Debugw("ListLogicalDeviceFlowGroups", log.Fields{"logicaldeviceid": id})
+	if agent := ldMgr.getLogicalDeviceAgent(id); agent != nil {
+		return agent.ListLogicalDeviceFlowGroups()
+	}
+	return nil, status.Errorf(codes.NotFound, "%s", id)
+
+}
+
+func (ldMgr *LogicalDeviceManager) getLogicalPort(lPortId *voltha.LogicalPortId) (*voltha.LogicalPort, error) {
+	// Get the logical device where this device is attached
+	var err error
+	var lDevice *voltha.LogicalDevice
+	if lDevice, err = ldMgr.getLogicalDevice(lPortId.Id); err != nil {
+		return nil, err
+	}
+	// Go over list of ports
+	for _, port := range lDevice.Ports {
+		if port.Id == lPortId.PortId {
+			return port, nil
+		}
+	}
+	return nil, status.Errorf(codes.NotFound, "%s-$s", lPortId.Id, lPortId.PortId)
+}
diff --git a/ro_core/core/model_proxy.go b/ro_core/core/model_proxy.go
new file mode 100644
index 0000000..f5e6c3b
--- /dev/null
+++ b/ro_core/core/model_proxy.go
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2019-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 (
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/model"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"strings"
+	"sync"
+)
+
+// ModelProxy controls requests made to the data model
+type ModelProxy struct {
+	rootProxy *model.Proxy
+	basePath  string
+	mutex     sync.RWMutex
+}
+
+func newModelProxy(basePath string, rootProxy *model.Proxy) *ModelProxy {
+	ga := &ModelProxy{}
+	ga.rootProxy = rootProxy
+
+	if strings.HasPrefix(basePath, "/") {
+		ga.basePath = basePath
+	} else {
+		ga.basePath = "/" + basePath
+	}
+
+	return ga
+}
+
+// Get retrieves information at the provided path
+func (mp *ModelProxy) Get(parts ...string) (interface{}, error) {
+	mp.mutex.Lock()
+	defer mp.mutex.Unlock()
+
+	rawPath := []string{mp.basePath}
+	rawPath = append(rawPath, parts...)
+	path := strings.Join(rawPath, "/")
+
+	log.Debugw("get-data", log.Fields{"path": path})
+
+	if data := mp.rootProxy.Get(path, 1, false, ""); data != nil {
+		return data, nil
+	}
+	return nil, status.Errorf(codes.NotFound, "data-path: %s", path)
+}
diff --git a/ro_core/core/model_proxy_manager.go b/ro_core/core/model_proxy_manager.go
new file mode 100644
index 0000000..d5f7ace
--- /dev/null
+++ b/ro_core/core/model_proxy_manager.go
@@ -0,0 +1,252 @@
+/*
+ * Copyright 2019-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 (
+	"context"
+	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-go/db/model"
+	"github.com/opencord/voltha-go/protos/voltha"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+// Enumerated type to keep track of miscellaneous data path agents
+type DataModelType int
+
+// Enumerated list of data path agents
+const (
+	Adapters DataModelType = 1 + iota
+	AlarmFilters
+	CoreInstances
+	DeviceTypes
+	DeviceGroups
+	Voltha
+)
+
+// String equivalent for data path agents
+var commonTypes = []string {
+	"Adapters",
+	"AlarmFilters",
+	"CoreInstances",
+	"DeviceTypes",
+	"DeviceGroups",
+	"Voltha",
+}
+
+// String converts the enumerated data path agent value to its string equivalent
+func (t DataModelType) String() string {
+	return commonTypes[t-1]
+}
+
+// ModelProxyManager controls requests made to the miscellaneous data path agents
+type ModelProxyManager struct {
+	modelProxy       map[string]*ModelProxy
+	clusterDataProxy *model.Proxy
+}
+
+func newModelProxyManager(cdProxy *model.Proxy) *ModelProxyManager {
+	var mgr ModelProxyManager
+	mgr.modelProxy = make(map[string]*ModelProxy)
+	mgr.clusterDataProxy = cdProxy
+	return &mgr
+}
+
+// GetDeviceType returns the device type associated to the provided id
+func (mpMgr *ModelProxyManager) GetVoltha(ctx context.Context) (*voltha.Voltha, error) {
+	log.Debug("GetVoltha")
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[Voltha.String()]; !exists {
+		agent = newModelProxy("", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[Voltha.String()] = agent
+	}
+
+	if instance, _ := agent.Get(); instance != nil {
+		return instance.(*voltha.Voltha), nil
+	}
+
+	return &voltha.Voltha{}, status.Errorf(codes.NotFound, "no-voltha-instance")
+}
+
+// ListCoreInstances returns all the core instances known to the system
+func (mpMgr *ModelProxyManager) ListCoreInstances(ctx context.Context) (*voltha.CoreInstances, error) {
+	log.Debug("ListCoreInstances")
+
+	// TODO: Need to retrieve the list of registered cores
+
+	return &voltha.CoreInstances{}, status.Errorf(codes.NotFound, "no-core-instances")
+}
+
+// GetCoreInstance returns the core instance associated to the provided id
+func (mpMgr *ModelProxyManager) GetCoreInstance(ctx context.Context, id string) (*voltha.CoreInstance, error) {
+	log.Debugw("GetCoreInstance", log.Fields{"id": id})
+
+	// TODO: Need to retrieve the list of registered cores
+
+	return &voltha.CoreInstance{}, status.Errorf(codes.NotFound, "core-instance-%s", id)
+}
+
+// ListAdapters returns all the device types known to the system
+func (mpMgr *ModelProxyManager) ListAdapters(ctx context.Context) (*voltha.Adapters, error) {
+	log.Debug("ListAdapters")
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[Adapters.String()]; !exists {
+		agent = newModelProxy("adapters", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[Adapters.String()] = agent
+	}
+
+	adapters := &voltha.Adapters{}
+	if items, _ := agent.Get(); items != nil {
+		for _, item := range items.([]interface{}) {
+			adapters.Items = append(adapters.Items, item.(*voltha.Adapter))
+		}
+		log.Debugw("retrieved-adapters", log.Fields{"adapters": adapters})
+		return adapters, nil
+	}
+
+	return adapters, status.Errorf(codes.NotFound, "no-adapters")
+}
+
+// ListDeviceTypes returns all the device types known to the system
+func (mpMgr *ModelProxyManager) ListDeviceTypes(ctx context.Context) (*voltha.DeviceTypes, error) {
+	log.Debug("ListDeviceTypes")
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[DeviceTypes.String()]; !exists {
+		agent = newModelProxy("device_types", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[DeviceTypes.String()] = agent
+	}
+
+	deviceTypes := &voltha.DeviceTypes{}
+	if items, _ := agent.Get(); items != nil {
+		for _, item := range items.([]interface{}) {
+			deviceTypes.Items = append(deviceTypes.Items, item.(*voltha.DeviceType))
+		}
+		return deviceTypes, nil
+	}
+
+	return deviceTypes, status.Errorf(codes.NotFound, "no-device-types")
+}
+
+// GetDeviceType returns the device type associated to the provided id
+func (mpMgr *ModelProxyManager) GetDeviceType(ctx context.Context, id string) (*voltha.DeviceType, error) {
+	log.Debugw("GetDeviceType", log.Fields{"id": id})
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[DeviceTypes.String()]; !exists {
+		agent = newModelProxy("device_types", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[DeviceTypes.String()] = agent
+	}
+
+	if deviceType, _ := agent.Get(id); deviceType != nil {
+		return deviceType.(*voltha.DeviceType), nil
+	}
+
+	return &voltha.DeviceType{}, status.Errorf(codes.NotFound, "device-type-%s", id)
+}
+
+// ListDeviceGroups returns all the device groups known to the system
+func (mpMgr *ModelProxyManager) ListDeviceGroups(ctx context.Context) (*voltha.DeviceGroups, error) {
+	log.Debug("ListDeviceGroups")
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[DeviceGroups.String()]; !exists {
+		agent = newModelProxy("device_groups", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[DeviceGroups.String()] = agent
+	}
+
+	deviceGroups := &voltha.DeviceGroups{}
+	if items, _ := agent.Get(); items != nil {
+		for _, item := range items.([]interface{}) {
+			deviceGroups.Items = append(deviceGroups.Items, item.(*voltha.DeviceGroup))
+		}
+		return deviceGroups, nil
+	}
+
+	return deviceGroups, status.Errorf(codes.NotFound, "no-device-groups")
+}
+
+// GetDeviceGroup returns the device group associated to the provided id
+func (mpMgr *ModelProxyManager) GetDeviceGroup(ctx context.Context, id string) (*voltha.DeviceGroup, error) {
+	log.Debugw("GetDeviceGroup", log.Fields{"id": id})
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[DeviceGroups.String()]; !exists {
+		agent = newModelProxy("device_groups", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[DeviceGroups.String()] = agent
+	}
+
+	if deviceGroup, _ := agent.Get(id); deviceGroup != nil {
+		return deviceGroup.(*voltha.DeviceGroup), nil
+	}
+
+	return &voltha.DeviceGroup{}, status.Errorf(codes.NotFound, "device-group-%s", id)
+}
+
+// ListAlarmFilters returns all the alarm filters known to the system
+func (mpMgr *ModelProxyManager) ListAlarmFilters(ctx context.Context) (*voltha.AlarmFilters, error) {
+	log.Debug("ListAlarmFilters")
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[AlarmFilters.String()]; !exists {
+		agent = newModelProxy("alarm_filters", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[AlarmFilters.String()] = agent
+	}
+
+	alarmFilters := &voltha.AlarmFilters{}
+	if items, _ := agent.Get(); items != nil {
+		for _, item := range items.([]interface{}) {
+			alarmFilters.Filters = append(alarmFilters.Filters, item.(*voltha.AlarmFilter))
+		}
+		return alarmFilters, nil
+	}
+
+	return alarmFilters, status.Errorf(codes.NotFound, "no-alarm-filters")
+}
+
+// GetAlarmFilter returns the alarm filter associated to the provided id
+func (mpMgr *ModelProxyManager) GetAlarmFilter(ctx context.Context, id string) (*voltha.AlarmFilter, error) {
+	log.Debugw("GetAlarmFilter", log.Fields{"id": id})
+
+	var agent *ModelProxy
+	var exists bool
+
+	if agent, exists = mpMgr.modelProxy[AlarmFilters.String()]; !exists {
+		agent = newModelProxy("alarm_filters", mpMgr.clusterDataProxy)
+		mpMgr.modelProxy[AlarmFilters.String()] = agent
+	}
+
+	if alarmFilter, _ := agent.Get(id); alarmFilter != nil {
+		return alarmFilter.(*voltha.AlarmFilter), nil
+	}
+	return &voltha.AlarmFilter{}, status.Errorf(codes.NotFound, "alarm-filter-%s", id)
+}