diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/grpc/client.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/grpc/client.go
new file mode 100644
index 0000000..de649d6
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/grpc/client.go
@@ -0,0 +1,541 @@
+/*
+ * Copyright 2021-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package grpc
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"strings"
+	"sync"
+	"time"
+
+	grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
+	grpc_opentracing "github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
+	"github.com/opencord/voltha-lib-go/v7/pkg/probe"
+	"github.com/opencord/voltha-protos/v5/go/adapter_services"
+	"github.com/opencord/voltha-protos/v5/go/core"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/keepalive"
+)
+
+type event byte
+type state byte
+type SetAndTestServiceHandler func(context.Context, *grpc.ClientConn) interface{}
+type RestartedHandler func(ctx context.Context, endPoint string) error
+
+type contextKey string
+
+func (c contextKey) String() string {
+	return string(c)
+}
+
+var (
+	grpcMonitorContextKey = contextKey("grpc-monitor")
+)
+
+const (
+	grpcBackoffInitialInterval = "GRPC_BACKOFF_INITIAL_INTERVAL"
+	grpcBackoffMaxInterval     = "GRPC_BACKOFF_MAX_INTERVAL"
+	grpcBackoffMaxElapsedTime  = "GRPC_BACKOFF_MAX_ELAPSED_TIME"
+	grpcMonitorInterval        = "GRPC_MONITOR_INTERVAL"
+)
+
+const (
+	DefaultBackoffInitialInterval = 100 * time.Millisecond
+	DefaultBackoffMaxInterval     = 5 * time.Second
+	DefaultBackoffMaxElapsedTime  = 0 * time.Second // No time limit
+	DefaultGRPCMonitorInterval    = 5 * time.Second
+)
+
+const (
+	connectionErrorSubString  = "SubConns are in TransientFailure"
+	connectionClosedSubstring = "client connection is closing"
+	connectionError           = "connection error"
+	connectionSystemNotReady  = "system is not ready"
+)
+
+const (
+	eventConnecting = event(iota)
+	eventConnected
+	eventDisconnected
+	eventStopped
+	eventError
+
+	stateConnected = state(iota)
+	stateConnecting
+	stateDisconnected
+)
+
+type Client struct {
+	apiEndPoint            string
+	connection             *grpc.ClientConn
+	connectionLock         sync.RWMutex
+	stateLock              sync.RWMutex
+	state                  state
+	service                interface{}
+	events                 chan event
+	onRestart              RestartedHandler
+	backoffInitialInterval time.Duration
+	backoffMaxInterval     time.Duration
+	backoffMaxElapsedTime  time.Duration
+	activityCheck          bool
+	monitorInterval        time.Duration
+	activeCh               chan struct{}
+	activeChMutex          sync.RWMutex
+	done                   bool
+	livenessCallback       func(timestamp time.Time)
+}
+
+type ClientOption func(*Client)
+
+func ActivityCheck(enable bool) ClientOption {
+	return func(args *Client) {
+		args.activityCheck = enable
+	}
+}
+
+func NewClient(endpoint string, onRestart RestartedHandler, opts ...ClientOption) (*Client, error) {
+	c := &Client{
+		apiEndPoint:            endpoint,
+		onRestart:              onRestart,
+		events:                 make(chan event, 1),
+		state:                  stateDisconnected,
+		backoffInitialInterval: DefaultBackoffInitialInterval,
+		backoffMaxInterval:     DefaultBackoffMaxInterval,
+		backoffMaxElapsedTime:  DefaultBackoffMaxElapsedTime,
+		monitorInterval:        DefaultGRPCMonitorInterval,
+	}
+	for _, option := range opts {
+		option(c)
+	}
+
+	// Check for environment variables
+	if err := SetFromEnvVariable(grpcBackoffInitialInterval, &c.backoffInitialInterval); err != nil {
+		logger.Warnw(context.Background(), "failure-reading-env-variable", log.Fields{"error": err, "variable": grpcBackoffInitialInterval})
+	}
+
+	if err := SetFromEnvVariable(grpcBackoffMaxInterval, &c.backoffMaxInterval); err != nil {
+		logger.Warnw(context.Background(), "failure-reading-env-variable", log.Fields{"error": err, "variable": grpcBackoffMaxInterval})
+	}
+
+	if err := SetFromEnvVariable(grpcBackoffMaxElapsedTime, &c.backoffMaxElapsedTime); err != nil {
+		logger.Warnw(context.Background(), "failure-reading-env-variable", log.Fields{"error": err, "variable": grpcBackoffMaxElapsedTime})
+	}
+
+	if err := SetFromEnvVariable(grpcMonitorInterval, &c.monitorInterval); err != nil {
+		logger.Warnw(context.Background(), "failure-reading-env-variable", log.Fields{"error": err, "variable": grpcMonitorInterval})
+	}
+
+	logger.Infow(context.Background(), "initialized-client", log.Fields{"client": c})
+
+	// Sanity check
+	if c.backoffInitialInterval > c.backoffMaxInterval {
+		return nil, fmt.Errorf("initial retry delay %v is greater than maximum retry delay %v", c.backoffInitialInterval, c.backoffMaxInterval)
+	}
+
+	return c, nil
+}
+
+func (c *Client) GetClient() (interface{}, error) {
+	c.connectionLock.RLock()
+	defer c.connectionLock.RUnlock()
+	if c.service == nil {
+		return nil, fmt.Errorf("no connection to %s", c.apiEndPoint)
+	}
+	return c.service, nil
+}
+
+// GetCoreServiceClient is a helper function that returns a concrete service instead of the GetClient() API
+// which returns an interface
+func (c *Client) GetCoreServiceClient() (core.CoreServiceClient, error) {
+	c.connectionLock.RLock()
+	defer c.connectionLock.RUnlock()
+	if c.service == nil {
+		return nil, fmt.Errorf("no core connection to %s", c.apiEndPoint)
+	}
+	client, ok := c.service.(core.CoreServiceClient)
+	if ok {
+		return client, nil
+	}
+	return nil, fmt.Errorf("invalid-service-%s", reflect.TypeOf(c.service))
+}
+
+// GetOnuAdapterServiceClient is a helper function that returns a concrete service instead of the GetClient() API
+// which returns an interface
+func (c *Client) GetOnuInterAdapterServiceClient() (adapter_services.OnuInterAdapterServiceClient, error) {
+	c.connectionLock.RLock()
+	defer c.connectionLock.RUnlock()
+	if c.service == nil {
+		return nil, fmt.Errorf("no child adapter connection to %s", c.apiEndPoint)
+	}
+	client, ok := c.service.(adapter_services.OnuInterAdapterServiceClient)
+	if ok {
+		return client, nil
+	}
+	return nil, fmt.Errorf("invalid-service-%s", reflect.TypeOf(c.service))
+}
+
+// GetOltAdapterServiceClient is a helper function that returns a concrete service instead of the GetClient() API
+// which returns an interface
+func (c *Client) GetOltInterAdapterServiceClient() (adapter_services.OltInterAdapterServiceClient, error) {
+	c.connectionLock.RLock()
+	defer c.connectionLock.RUnlock()
+	if c.service == nil {
+		return nil, fmt.Errorf("no parent adapter connection to %s", c.apiEndPoint)
+	}
+	client, ok := c.service.(adapter_services.OltInterAdapterServiceClient)
+	if ok {
+		return client, nil
+	}
+	return nil, fmt.Errorf("invalid-service-%s", reflect.TypeOf(c.service))
+}
+
+func (c *Client) Reset(ctx context.Context) {
+	logger.Debugw(ctx, "resetting-client-connection", log.Fields{"endpoint": c.apiEndPoint})
+	c.stateLock.Lock()
+	defer c.stateLock.Unlock()
+	if c.state == stateConnected {
+		c.state = stateDisconnected
+		c.events <- eventDisconnected
+	}
+}
+
+func (c *Client) clientInterceptor(ctx context.Context, method string, req interface{}, reply interface{},
+	cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+	// Nothing to do before intercepting the call
+	err := invoker(ctx, method, req, reply, cc, opts...)
+	// On connection failure, start the reconnect process depending on the error response
+	if err != nil {
+		logger.Errorw(ctx, "received-error", log.Fields{"error": err, "context": ctx, "endpoint": c.apiEndPoint})
+		if strings.Contains(err.Error(), connectionErrorSubString) ||
+			strings.Contains(err.Error(), connectionError) ||
+			strings.Contains(err.Error(), connectionSystemNotReady) ||
+			isGrpcMonitorKeyPresentInContext(ctx) {
+			c.stateLock.Lock()
+			if c.state == stateConnected {
+				logger.Warnw(context.Background(), "sending-disconnect-event", log.Fields{"endpoint": c.apiEndPoint, "error": err})
+				c.state = stateDisconnected
+				c.events <- eventDisconnected
+			}
+			c.stateLock.Unlock()
+		} else if strings.Contains(err.Error(), connectionClosedSubstring) {
+			logger.Errorw(context.Background(), "invalid-client-connection-closed", log.Fields{"endpoint": c.apiEndPoint, "error": err})
+		}
+		return err
+	}
+	// Update activity on success only
+	c.updateActivity(ctx)
+	return nil
+}
+
+// updateActivity pushes an activity indication on the channel so that the monitoring routine does not validate
+// the gRPC connection when the connection is being used. Note that this update is done both when the connection
+// is alive or a connection error is returned. A separate routine takes care of doing the re-connect.
+func (c *Client) updateActivity(ctx context.Context) {
+	c.activeChMutex.RLock()
+	defer c.activeChMutex.RUnlock()
+	if c.activeCh != nil {
+		logger.Debugw(ctx, "update-activity", log.Fields{"api-endpoint": c.apiEndPoint})
+		c.activeCh <- struct{}{}
+
+		// Update liveness only in connected state
+		if c.livenessCallback != nil {
+			c.stateLock.RLock()
+			if c.state == stateConnected {
+				c.livenessCallback(time.Now())
+			}
+			c.stateLock.RUnlock()
+		}
+	}
+}
+
+func WithGrpcMonitorContext(ctx context.Context, name string) context.Context {
+	ctx = context.WithValue(ctx, grpcMonitorContextKey, name)
+	return ctx
+}
+
+func isGrpcMonitorKeyPresentInContext(ctx context.Context) bool {
+	if ctx != nil {
+		_, present := ctx.Value(grpcMonitorContextKey).(string)
+		return present
+	}
+	return false
+}
+
+// monitorActivity monitors the activity on the gRPC connection.   If there are no activity after a specified
+// timeout, it will send a default API request on that connection.   If the connection is good then nothing
+// happens.  If it's bad this will trigger reconnection attempts.
+func (c *Client) monitorActivity(ctx context.Context, handler SetAndTestServiceHandler) {
+	logger.Infow(ctx, "start-activity-monitor", log.Fields{"endpoint": c.apiEndPoint})
+
+	// Create an activity monitor channel.  Unbuffered channel works well.  However, we use a buffered
+	// channel here as a safeguard of having the grpc interceptor publishing too many events that can be
+	// consumed by this monitoring thread
+	c.activeChMutex.Lock()
+	c.activeCh = make(chan struct{}, 10)
+	c.activeChMutex.Unlock()
+
+	// Interval to wait for no activity before probing the connection
+	timeout := c.monitorInterval
+loop:
+	for {
+		timeoutTimer := time.NewTimer(timeout)
+		select {
+
+		case <-c.activeCh:
+			logger.Debugw(ctx, "received-active-notification", log.Fields{"endpoint": c.apiEndPoint})
+
+			// Reset timer
+			if !timeoutTimer.Stop() {
+				<-timeoutTimer.C
+			}
+
+		case <-ctx.Done():
+			break loop
+
+		case <-timeoutTimer.C:
+			// Trigger an activity check if the state is connected.  If the state is not connected then there is already
+			// a backoff retry mechanism in place to retry establishing connection.
+			c.stateLock.RLock()
+			runCheck := c.state == stateConnected
+			c.stateLock.RUnlock()
+			if runCheck {
+				go func() {
+					logger.Debugw(ctx, "connection-check-start", log.Fields{"api-endpoint": c.apiEndPoint})
+					subCtx, cancel := context.WithTimeout(ctx, c.backoffMaxInterval)
+					defer cancel()
+					subCtx = WithGrpcMonitorContext(subCtx, "grpc-monitor")
+					c.connectionLock.RLock()
+					defer c.connectionLock.RUnlock()
+					if c.connection != nil {
+						response := handler(subCtx, c.connection)
+						logger.Debugw(ctx, "connection-check-response", log.Fields{"api-endpoint": c.apiEndPoint, "up": response != nil})
+					}
+				}()
+			}
+		}
+	}
+	logger.Infow(ctx, "activity-monitor-stopping", log.Fields{"endpoint": c.apiEndPoint})
+}
+
+// Start kicks off the adapter agent by trying to connect to the adapter
+func (c *Client) Start(ctx context.Context, handler SetAndTestServiceHandler) {
+	logger.Debugw(ctx, "Starting GRPC - Client", log.Fields{"api-endpoint": c.apiEndPoint})
+
+	// If the context contains a k8s probe then register services
+	p := probe.GetProbeFromContext(ctx)
+	if p != nil {
+		p.RegisterService(ctx, c.apiEndPoint)
+	}
+
+	// Enable activity check, if required
+	if c.activityCheck {
+		go c.monitorActivity(ctx, handler)
+	}
+
+	initialConnection := true
+	c.events <- eventConnecting
+	backoff := NewBackoff(c.backoffInitialInterval, c.backoffMaxInterval, c.backoffMaxElapsedTime)
+	attempt := 1
+loop:
+	for {
+		select {
+		case <-ctx.Done():
+			logger.Debugw(ctx, "context-closing", log.Fields{"endpoint": c.apiEndPoint})
+			return
+		case event := <-c.events:
+			logger.Debugw(ctx, "received-event", log.Fields{"event": event, "endpoint": c.apiEndPoint})
+			switch event {
+			case eventConnecting:
+				logger.Debugw(ctx, "connection-start", log.Fields{"endpoint": c.apiEndPoint, "attempts": attempt})
+
+				c.stateLock.Lock()
+				if c.state == stateConnected {
+					c.state = stateDisconnected
+				}
+				if c.state != stateConnecting {
+					c.state = stateConnecting
+					go func() {
+						if err := c.connectToEndpoint(ctx, handler, p); err != nil {
+							c.stateLock.Lock()
+							c.state = stateDisconnected
+							c.stateLock.Unlock()
+							logger.Errorw(ctx, "connection-failed", log.Fields{"endpoint": c.apiEndPoint, "attempt": attempt, "error": err})
+
+							// Retry connection after a delay
+							if err = backoff.Backoff(ctx); err != nil {
+								// Context has closed or reached maximum elapsed time, if set
+								logger.Errorw(ctx, "retry-aborted", log.Fields{"endpoint": c.apiEndPoint, "error": err})
+								return
+							}
+							attempt += 1
+							c.events <- eventConnecting
+						} else {
+							backoff.Reset()
+						}
+					}()
+				}
+				c.stateLock.Unlock()
+
+			case eventConnected:
+				logger.Debugw(ctx, "endpoint-connected", log.Fields{"endpoint": c.apiEndPoint})
+				attempt = 1
+				c.stateLock.Lock()
+				if c.state != stateConnected {
+					c.state = stateConnected
+					if initialConnection {
+						logger.Debugw(ctx, "initial-endpoint-connection", log.Fields{"endpoint": c.apiEndPoint})
+						initialConnection = false
+					} else {
+						logger.Debugw(ctx, "endpoint-reconnection", log.Fields{"endpoint": c.apiEndPoint})
+						// Trigger any callback on a restart
+						go func() {
+							err := c.onRestart(log.WithSpanFromContext(context.Background(), ctx), c.apiEndPoint)
+							if err != nil {
+								logger.Errorw(ctx, "unable-to-restart-endpoint", log.Fields{"error": err, "endpoint": c.apiEndPoint})
+							}
+						}()
+					}
+				}
+				c.stateLock.Unlock()
+
+			case eventDisconnected:
+				if p != nil {
+					p.UpdateStatus(ctx, c.apiEndPoint, probe.ServiceStatusNotReady)
+				}
+				logger.Debugw(ctx, "endpoint-disconnected", log.Fields{"endpoint": c.apiEndPoint, "status": c.state})
+
+				// Try to connect again
+				c.events <- eventConnecting
+
+			case eventStopped:
+				logger.Debugw(ctx, "endPoint-stopped", log.Fields{"adapter": c.apiEndPoint})
+				go func() {
+					if err := c.closeConnection(ctx, p); err != nil {
+						logger.Errorw(ctx, "endpoint-closing-connection-failed", log.Fields{"endpoint": c.apiEndPoint, "error": err})
+					}
+				}()
+				break loop
+			case eventError:
+				logger.Errorw(ctx, "endpoint-error-event", log.Fields{"endpoint": c.apiEndPoint})
+			default:
+				logger.Errorw(ctx, "endpoint-unknown-event", log.Fields{"endpoint": c.apiEndPoint, "error": event})
+			}
+		}
+	}
+	logger.Infow(ctx, "endpoint-stopped", log.Fields{"endpoint": c.apiEndPoint})
+}
+
+func (c *Client) connectToEndpoint(ctx context.Context, handler SetAndTestServiceHandler, p *probe.Probe) error {
+	if p != nil {
+		p.UpdateStatus(ctx, c.apiEndPoint, probe.ServiceStatusPreparing)
+	}
+
+	c.connectionLock.Lock()
+	defer c.connectionLock.Unlock()
+
+	if c.connection != nil {
+		_ = c.connection.Close()
+		c.connection = nil
+	}
+
+	c.service = nil
+
+	// Use Interceptors to:
+	// 1. automatically inject
+	// 2. publish Open Tracing Spans by this GRPC Client
+	// 3. detect connection failure on client calls such that the reconnection process can begin
+	conn, err := grpc.Dial(c.apiEndPoint,
+		grpc.WithInsecure(),
+		grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(
+			grpc_opentracing.StreamClientInterceptor(grpc_opentracing.WithTracer(log.ActiveTracerProxy{})),
+		)),
+		grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(
+			grpc_opentracing.UnaryClientInterceptor(grpc_opentracing.WithTracer(log.ActiveTracerProxy{})),
+		)),
+		grpc.WithUnaryInterceptor(c.clientInterceptor),
+		// Set keealive parameter - use default grpc values
+		grpc.WithKeepaliveParams(keepalive.ClientParameters{
+			Time:                c.monitorInterval,
+			Timeout:             c.backoffMaxInterval,
+			PermitWithoutStream: true,
+		}),
+	)
+
+	if err == nil {
+		subCtx, cancel := context.WithTimeout(ctx, c.backoffMaxInterval)
+		defer cancel()
+		svc := handler(subCtx, conn)
+		if svc != nil {
+			c.connection = conn
+			c.service = svc
+			if p != nil {
+				p.UpdateStatus(ctx, c.apiEndPoint, probe.ServiceStatusRunning)
+			}
+			logger.Infow(ctx, "connected-to-endpoint", log.Fields{"endpoint": c.apiEndPoint})
+			c.events <- eventConnected
+			return nil
+		}
+	}
+	logger.Warnw(ctx, "Failed to connect to endpoint",
+		log.Fields{
+			"endpoint": c.apiEndPoint,
+			"error":    err,
+		})
+
+	if p != nil {
+		p.UpdateStatus(ctx, c.apiEndPoint, probe.ServiceStatusFailed)
+	}
+	return fmt.Errorf("no connection to endpoint %s", c.apiEndPoint)
+}
+
+func (c *Client) closeConnection(ctx context.Context, p *probe.Probe) error {
+	if p != nil {
+		p.UpdateStatus(ctx, c.apiEndPoint, probe.ServiceStatusStopped)
+	}
+
+	c.connectionLock.Lock()
+	defer c.connectionLock.Unlock()
+
+	if c.connection != nil {
+		err := c.connection.Close()
+		c.connection = nil
+		return err
+	}
+
+	return nil
+}
+
+func (c *Client) Stop(ctx context.Context) {
+	if !c.done {
+		c.events <- eventStopped
+		close(c.events)
+		c.done = true
+	}
+}
+
+// SetService is used for testing only
+func (c *Client) SetService(srv interface{}) {
+	c.connectionLock.Lock()
+	defer c.connectionLock.Unlock()
+	c.service = srv
+}
+
+func (c *Client) SubscribeForLiveness(callback func(timestamp time.Time)) {
+	c.livenessCallback = callback
+}