diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/core_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/core_proxy_if.go
index dbf3418..9636a7d 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/core_proxy_if.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif/core_proxy_if.go
@@ -18,7 +18,6 @@
 
 import (
 	"context"
-
 	"github.com/opencord/voltha-protos/v3/go/voltha"
 )
 
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/configmanager.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/configmanager.go
index 8f96b22..441c488 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/configmanager.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/configmanager.go
@@ -24,9 +24,16 @@
 	"strings"
 )
 
+func init() {
+	_, err := log.AddPackage(log.JSON, log.FatalLevel, nil)
+	if err != nil {
+		log.Errorw("unable-to-register-package-to-the-log-map", log.Fields{"error": err})
+	}
+}
+
 const (
 	defaultkvStoreConfigPath = "config"
-	kvStoreDataPathPrefix    = "/service/voltha"
+	kvStoreDataPathPrefix    = "service/voltha"
 	kvStorePathSeparator     = "/"
 )
 
@@ -52,6 +59,10 @@
 	Delete
 )
 
+func (ce ChangeEvent) String() string {
+	return [...]string{"Put", "Delete"}[ce]
+}
+
 // ConfigChangeEvent represents config for the events recieved from watch
 // For example,ChangeType is Put ,ConfigAttribute default
 type ConfigChangeEvent struct {
@@ -102,6 +113,35 @@
 	}
 }
 
+// RetrieveComponentList list the component Names for which loglevel is stored in kvstore
+func (c *ConfigManager) RetrieveComponentList(ctx context.Context, configType ConfigType) ([]string, error) {
+	data, err := c.backend.List(ctx, c.KvStoreConfigPrefix)
+	if err != nil {
+		return nil, err
+	}
+
+	// Looping through the data recieved from the backend for config
+	// Trimming and Splitting the required key and value from data and  storing as componentName,PackageName and Level
+	// For Example, recieved key would be <Backend Prefix Path>/<Config Prefix>/<Component Name>/<Config Type>/default and value \"DEBUG\"
+	// Then in default will be stored as PackageName,componentName as <Component Name> and DEBUG will be stored as value in List struct
+	ccPathPrefix := kvStorePathSeparator + configType.String() + kvStorePathSeparator
+	pathPrefix := kvStoreDataPathPrefix + kvStorePathSeparator + c.KvStoreConfigPrefix + kvStorePathSeparator
+	var list []string
+	keys := make(map[string]interface{})
+	for attr := range data {
+		cname := strings.TrimPrefix(attr, pathPrefix)
+		cName := strings.SplitN(cname, ccPathPrefix, 2)
+		if len(cName) != 2 {
+			continue
+		}
+		if _, exist := keys[cName[0]]; !exist {
+			keys[cName[0]] = nil
+			list = append(list, cName[0])
+		}
+	}
+	return list, nil
+}
+
 // Initialize the component config
 func (cm *ConfigManager) InitComponentConfig(componentLabel string, configType ConfigType) *ComponentConfig {
 
@@ -147,8 +187,11 @@
 func (c *ComponentConfig) processKVStoreWatchEvents() {
 
 	ccKeyPrefix := c.makeConfigPath()
+
 	log.Debugw("processing-kvstore-event-change", log.Fields{"key-prefix": ccKeyPrefix})
+
 	ccPathPrefix := c.cManager.backend.PathPrefix + ccKeyPrefix + kvStorePathSeparator
+
 	for watchResp := range c.kvStoreEventChan {
 
 		if watchResp.EventType == kvstore.CONNECTIONDOWN || watchResp.EventType == kvstore.UNKNOWN {
@@ -168,10 +211,30 @@
 	}
 }
 
+// Retrieves value of a specific config key. Value of key is returned in String format
+func (c *ComponentConfig) Retrieve(ctx context.Context, configKey string) (string, error) {
+	key := c.makeConfigPath() + "/" + configKey
+
+	log.Debugw("retrieving-config", log.Fields{"key": key})
+
+	if kvpair, err := c.cManager.backend.Get(ctx, key); err != nil {
+		return "", err
+	} else {
+		if kvpair == nil {
+			return "", fmt.Errorf("config-key-does-not-exist : %s", key)
+		}
+
+		value := strings.Trim(fmt.Sprintf("%s", kvpair.Value), "\"")
+		log.Debugw("retrieved-config", log.Fields{"key": key, "value": value})
+		return value, nil
+	}
+}
+
 func (c *ComponentConfig) RetrieveAll(ctx context.Context) (map[string]string, error) {
 	key := c.makeConfigPath()
 
 	log.Debugw("retreiving-list", log.Fields{"key": key})
+
 	data, err := c.cManager.backend.List(ctx, key)
 	if err != nil {
 		return nil, err
@@ -190,10 +253,10 @@
 	return res, nil
 }
 
-func (c *ComponentConfig) Save(configKey string, configValue string, ctx context.Context) error {
+func (c *ComponentConfig) Save(ctx context.Context, configKey string, configValue string) error {
 	key := c.makeConfigPath() + "/" + configKey
 
-	log.Debugw("saving-key", log.Fields{"key": key, "value": configValue})
+	log.Debugw("saving-config", log.Fields{"key": key, "value": configValue})
 
 	//save the data for update config
 	if err := c.cManager.backend.Put(ctx, key, configValue); err != nil {
@@ -202,11 +265,11 @@
 	return nil
 }
 
-func (c *ComponentConfig) Delete(configKey string, ctx context.Context) error {
+func (c *ComponentConfig) Delete(ctx context.Context, configKey string) error {
 	//construct key using makeConfigPath
 	key := c.makeConfigPath() + "/" + configKey
 
-	log.Debugw("deleting-key", log.Fields{"key": key})
+	log.Debugw("deleting-config", log.Fields{"key": key})
 	//delete the config
 	if err := c.cManager.backend.Delete(ctx, key); err != nil {
 		return err
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/logcontroller.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/logcontroller.go
index b45c2c8..65927e6 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/logcontroller.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/config/logcontroller.go
@@ -14,8 +14,10 @@
  * limitations under the License.
  */
 
-// Package Config provides dynamic logging configuration for specific Voltha component type implemented using backend.The package can be used in following manner
-// Any Voltha component type can start dynamic logging by starting goroutine of ProcessLogConfigChange after starting kvClient for the component.
+// Package Config provides dynamic logging configuration for specific Voltha component with loglevel lookup
+// from etcd kvstore implemented using backend.
+// Any Voltha component can start utilizing dynamic logging by starting goroutine of StartLogLevelConfigProcessing after
+// starting kvClient for the component.
 
 package config
 
@@ -29,6 +31,12 @@
 	"strings"
 )
 
+const (
+	defaultLogLevelKey                = "default" // kvstore key containing default loglevel
+	globalConfigRootNode              = "global"  // Root Node in kvstore containing global config
+	initialGlobalDefaultLogLevelValue = "WARN"    // Hard-coded Global Default loglevel pushed at PoD startup
+)
+
 // ComponentLogController represents a Configuration for Logging Config of specific Voltha component type
 // It stores ComponentConfig and GlobalConfig of loglevel config of specific Voltha component type
 // For example,ComponentLogController instance will be created for rw-core component
@@ -38,6 +46,7 @@
 	GlobalConfig        *ComponentConfig
 	configManager       *ConfigManager
 	logHash             [16]byte
+	initialLogLevel     string // Initial default log level set by helm chart
 }
 
 func NewComponentLogController(cm *ConfigManager) (*ComponentLogController, error) {
@@ -48,40 +57,85 @@
 		return nil, errors.New("Unable to retrieve PoD Component Name from Runtime env")
 	}
 
+	var defaultLogLevel string
+	var err error
+	// Retrieve and save default log level; used for fallback if all loglevel config is cleared in etcd
+	if defaultLogLevel, err = log.LogLevelToString(log.GetDefaultLogLevel()); err != nil {
+		defaultLogLevel = "DEBUG"
+	}
+
 	return &ComponentLogController{
 		ComponentName:       componentName,
 		componentNameConfig: nil,
 		GlobalConfig:        nil,
 		configManager:       cm,
+		initialLogLevel:     defaultLogLevel,
 	}, nil
 
 }
 
-// ProcessLogConfigChange initialize component config and global config
-func ProcessLogConfigChange(cm *ConfigManager, ctx context.Context) {
+// StartLogLevelConfigProcessing initialize component config and global config
+// Then, it persists initial default Loglevels into Config Store before
+// starting the loading and processing of all Log Configuration
+func StartLogLevelConfigProcessing(cm *ConfigManager, ctx context.Context) {
 	cc, err := NewComponentLogController(cm)
 	if err != nil {
 		log.Errorw("unable-to-construct-component-log-controller-instance-for-log-config-monitoring", log.Fields{"error": err})
 		return
 	}
 
-	log.Debugw("processing-log-config-change", log.Fields{"cc": cc})
-
-	cc.GlobalConfig = cm.InitComponentConfig("global", ConfigTypeLogLevel)
+	cc.GlobalConfig = cm.InitComponentConfig(globalConfigRootNode, ConfigTypeLogLevel)
 	log.Debugw("global-log-config", log.Fields{"cc-global-config": cc.GlobalConfig})
 
 	cc.componentNameConfig = cm.InitComponentConfig(cc.ComponentName, ConfigTypeLogLevel)
 	log.Debugw("component-log-config", log.Fields{"cc-component-name-config": cc.componentNameConfig})
 
+	cc.persistInitialDefaultLogConfigs(ctx)
+
 	cc.processLogConfig(ctx)
 }
 
-// ProcessLogConfig wait on componentn config and global config channel for any changes
-// Event channel will be recieved from backend for valid change type
+// Method to persist Global default loglevel into etcd, if not set yet
+// It also checks and set Component default loglevel into etcd with initial loglevel set from command line
+func (c *ComponentLogController) persistInitialDefaultLogConfigs(ctx context.Context) {
+
+	_, err := c.GlobalConfig.Retrieve(ctx, defaultLogLevelKey)
+	if err != nil {
+		log.Debugw("failed-to-retrieve-global-default-log-config-at-startup", log.Fields{"error": err})
+
+		err = c.GlobalConfig.Save(ctx, defaultLogLevelKey, initialGlobalDefaultLogLevelValue)
+		if err != nil {
+			log.Errorw("failed-to-persist-global-default-log-config-at-startup", log.Fields{"error": err, "loglevel": initialGlobalDefaultLogLevelValue})
+		}
+	}
+
+	_, err = c.componentNameConfig.Retrieve(ctx, defaultLogLevelKey)
+	if err != nil {
+		log.Debugw("failed-to-retrieve-component-default-log-config-at-startup", log.Fields{"error": err})
+
+		err = c.componentNameConfig.Save(ctx, defaultLogLevelKey, c.initialLogLevel)
+		if err != nil {
+			log.Errorw("failed-to-persist-component-default-log-config-at-startup", log.Fields{"error": err, "loglevel": c.initialLogLevel})
+		}
+	}
+}
+
+// ProcessLogConfig will first load and apply log config and then start waiting on component config and global config
+// channels for any changes. Event channel will be recieved from backend for valid change type
 // Then data for componentn log config and global log config will be retrieved from backend and stored in updatedLogConfig in precedence order
 // If any changes in updatedLogConfig will be applied on component
 func (c *ComponentLogController) processLogConfig(ctx context.Context) {
 
+	// Load and apply Log Config for first time
+	initialLogConfig, err := c.buildUpdatedLogConfig(ctx)
+	if err != nil {
+		log.Warnw("unable-to-load-log-config-at-startup", log.Fields{"error": err})
+	} else {
+		if err := c.loadAndApplyLogConfig(initialLogConfig); err != nil {
+			log.Warnw("unable-to-apply-log-config-at-startup", log.Fields{"error": err})
+		}
+	}
+
 	componentConfigEventChan := c.componentNameConfig.MonitorForConfigChange(ctx)
 
 	globalConfigEventChan := c.GlobalConfig.MonitorForConfigChange(ctx)
@@ -94,7 +148,7 @@
 		case configEvent = <-componentConfigEventChan:
 
 		}
-		log.Debugw("processing-log-config-change", log.Fields{"config-event": configEvent})
+		log.Debugw("processing-log-config-change", log.Fields{"ChangeType": configEvent.ChangeType, "Package": configEvent.ConfigAttribute})
 
 		updatedLogConfig, err := c.buildUpdatedLogConfig(ctx)
 		if err != nil {
@@ -112,12 +166,12 @@
 }
 
 // get active loglevel from the zap logger
-func getActiveLogLevel() map[string]string {
-	loglevel := make(map[string]string)
+func getActiveLogLevels() map[string]string {
+	loglevels := make(map[string]string)
 
 	// now do the default log level
 	if level, err := log.LogLevelToString(log.GetDefaultLogLevel()); err == nil {
-		loglevel["default"] = level
+		loglevels[defaultLogLevelKey] = level
 	}
 
 	// do the per-package log levels
@@ -125,61 +179,69 @@
 		level, err := log.GetPackageLogLevel(packageName)
 		if err != nil {
 			log.Warnw("unable-to-fetch-current-active-loglevel-for-package-name", log.Fields{"package-name": packageName, "error": err})
+			continue
 		}
 
-		packagename := strings.ReplaceAll(packageName, "/", "#")
 		if l, err := log.LogLevelToString(level); err == nil {
-			loglevel[packagename] = l
+			loglevels[packageName] = l
 		}
-
 	}
-	log.Debugw("getting-log-levels-from-zap-logger", log.Fields{"log-level": loglevel})
 
-	return loglevel
+	log.Debugw("retreived-log-levels-from-zap-logger", log.Fields{"loglevels": loglevels})
+
+	return loglevels
 }
 
 func (c *ComponentLogController) getGlobalLogConfig(ctx context.Context) (string, error) {
 
-	globalDefaultLogLevel := ""
-	globalLogConfig, err := c.GlobalConfig.RetrieveAll(ctx)
+	globalDefaultLogLevel, err := c.GlobalConfig.Retrieve(ctx, defaultLogLevelKey)
 	if err != nil {
 		return "", err
 	}
 
-	if globalLevel, ok := globalLogConfig["default"]; ok {
-		if _, err := log.StringToLogLevel(globalLevel); err != nil {
-			log.Warnw("unsupported-loglevel-config-defined-at-global-context-pacakge-name", log.Fields{"log-level": globalLevel})
-		} else {
-			globalDefaultLogLevel = globalLevel
-		}
+	// Handle edge cases when global default loglevel is deleted directly from etcd or set to a invalid value
+	// We should use hard-coded initial default value in such cases
+	if globalDefaultLogLevel == "" {
+		log.Warn("global-default-loglevel-not-found-in-config-store")
+		globalDefaultLogLevel = initialGlobalDefaultLogLevelValue
 	}
-	log.Debugw("retrieved-global-log-config", log.Fields{"global-log-config": globalLogConfig})
+
+	if _, err := log.StringToLogLevel(globalDefaultLogLevel); err != nil {
+		log.Warnw("unsupported-loglevel-config-defined-at-global-default", log.Fields{"log-level": globalDefaultLogLevel})
+		globalDefaultLogLevel = initialGlobalDefaultLogLevelValue
+	}
+
+	log.Debugw("retrieved-global-default-loglevel", log.Fields{"level": globalDefaultLogLevel})
 
 	return globalDefaultLogLevel, nil
 }
 
-func (c *ComponentLogController) getComponentLogConfig(globalDefaultLogLevel string, ctx context.Context) (map[string]string, error) {
-	var defaultPresent bool
+func (c *ComponentLogController) getComponentLogConfig(ctx context.Context, globalDefaultLogLevel string) (map[string]string, error) {
 	componentLogConfig, err := c.componentNameConfig.RetrieveAll(ctx)
 	if err != nil {
 		return nil, err
 	}
 
-	for componentKey, componentLevel := range componentLogConfig {
-		if _, err := log.StringToLogLevel(componentLevel); err != nil || componentKey == "" {
-			log.Warnw("unsupported-loglevel-config-defined-at-component-context", log.Fields{"package-name": componentKey, "log-level": componentLevel})
-			delete(componentLogConfig, componentKey)
+	effectiveDefaultLogLevel := ""
+	for logConfigKey, logConfigValue := range componentLogConfig {
+		if _, err := log.StringToLogLevel(logConfigValue); err != nil || logConfigKey == "" {
+			log.Warnw("unsupported-loglevel-config-defined-at-component-context", log.Fields{"package-name": logConfigKey, "log-level": logConfigValue})
+			delete(componentLogConfig, logConfigKey)
 		} else {
-			if componentKey == "default" {
-				defaultPresent = true
+			if logConfigKey == defaultLogLevelKey {
+				effectiveDefaultLogLevel = componentLogConfig[defaultLogLevelKey]
 			}
 		}
 	}
-	if !defaultPresent {
-		if globalDefaultLogLevel != "" {
-			componentLogConfig["default"] = globalDefaultLogLevel
-		}
+
+	// if default loglevel is not configured for the component, component should use
+	// default loglevel configured at global level
+	if effectiveDefaultLogLevel == "" {
+		effectiveDefaultLogLevel = globalDefaultLogLevel
 	}
+
+	componentLogConfig[defaultLogLevelKey] = effectiveDefaultLogLevel
+
 	log.Debugw("retrieved-component-log-config", log.Fields{"component-log-level": componentLogConfig})
 
 	return componentLogConfig, nil
@@ -194,16 +256,20 @@
 func (c *ComponentLogController) buildUpdatedLogConfig(ctx context.Context) (map[string]string, error) {
 	globalLogLevel, err := c.getGlobalLogConfig(ctx)
 	if err != nil {
-		return nil, err
+		log.Errorw("unable-to-retrieve-global-log-config", log.Fields{"err": err})
 	}
 
-	componentLogConfig, err := c.getComponentLogConfig(globalLogLevel, ctx)
+	componentLogConfig, err := c.getComponentLogConfig(ctx, globalLogLevel)
 	if err != nil {
 		return nil, err
 	}
 
-	log.Debugw("building-and-updating-log-config", log.Fields{"component-log-config": componentLogConfig})
-	return componentLogConfig, nil
+	finalLogConfig := make(map[string]string)
+	for packageName, logLevel := range componentLogConfig {
+		finalLogConfig[strings.ReplaceAll(packageName, "#", "/")] = logLevel
+	}
+
+	return finalLogConfig, nil
 }
 
 // load and apply the current configuration for component name
@@ -216,64 +282,70 @@
 		return err
 	}
 
-	log.Debugw("loading-and-applying-log-config", log.Fields{"log-config": logConfig})
 	if c.logHash != currentLogHash {
 		UpdateLogLevels(logConfig)
 		c.logHash = currentLogHash
+	} else {
+		log.Debug("effective-loglevel-config-same-as-currently-active")
 	}
+
 	return nil
 }
 
-// getDefaultLogLevel to return active default log level
-func getDefaultLogLevel(logConfig map[string]string) string {
+// createModifiedLogLevels loops through the activeLogLevels recieved from zap logger and updatedLogLevels recieved from buildUpdatedLogConfig
+// to identify and create map of modified Log Levels of 2 types:
+// - Packages for which log level has been changed
+// - Packages for which log level config has been cleared - set to default log level
+func createModifiedLogLevels(activeLogLevels, updatedLogLevels map[string]string) map[string]string {
+	defaultLevel := updatedLogLevels[defaultLogLevelKey]
 
-	for key, level := range logConfig {
-		if key == "default" {
-			return level
-		}
-	}
-	return ""
-}
-
-// createCurrentLogLevel loop through the activeLogLevels recieved from zap logger and updatedLogLevels recieved from buildUpdatedLogConfig
-// The packageName is present or not will be checked in updatedLogLevels ,if the package name is not present then updatedLogLevels will be updated with
-// the packageName and loglevel with  default log level
-func createCurrentLogLevel(activeLogLevels, updatedLogLevels map[string]string) map[string]string {
-	level := getDefaultLogLevel(updatedLogLevels)
+	modifiedLogLevels := make(map[string]string)
 	for activeKey, activeLevel := range activeLogLevels {
 		if _, exist := updatedLogLevels[activeKey]; !exist {
-			if level != "" {
-				activeLevel = level
+			if activeLevel != defaultLevel {
+				modifiedLogLevels[activeKey] = defaultLevel
 			}
-			updatedLogLevels[activeKey] = activeLevel
+		} else if activeLevel != updatedLogLevels[activeKey] {
+			modifiedLogLevels[activeKey] = updatedLogLevels[activeKey]
 		}
 	}
-	return updatedLogLevels
+
+	// Log warnings for all invalid packages for which log config has been set
+	for key, value := range updatedLogLevels {
+		if _, exist := activeLogLevels[key]; !exist {
+			log.Warnw("ignoring-loglevel-set-for-invalid-package", log.Fields{"package": key, "log-level": value})
+		}
+	}
+
+	return modifiedLogLevels
 }
 
 // updateLogLevels update the loglevels for the component
 // retrieve active confguration from logger
 // compare with entries one by one and apply
-func UpdateLogLevels(logLevel map[string]string) {
+func UpdateLogLevels(updatedLogConfig map[string]string) {
 
-	activeLogLevels := getActiveLogLevel()
-	currentLogLevel := createCurrentLogLevel(activeLogLevels, logLevel)
-	for key, level := range currentLogLevel {
-		if key == "default" {
+	activeLogLevels := getActiveLogLevels()
+	changedLogLevels := createModifiedLogLevels(activeLogLevels, updatedLogConfig)
+
+	// If no changed log levels are found, just return. It may happen on configuration of a invalid package
+	if len(changedLogLevels) == 0 {
+		log.Debug("no-change-in-effective-loglevel-config")
+		return
+	}
+
+	log.Debugw("applying-log-level-for-modified-packages", log.Fields{"changed-log-levels": changedLogLevels})
+	for key, level := range changedLogLevels {
+		if key == defaultLogLevelKey {
 			if l, err := log.StringToLogLevel(level); err == nil {
 				log.SetDefaultLogLevel(l)
 			}
 		} else {
-			pname := strings.ReplaceAll(key, "#", "/")
-			if _, err := log.AddPackage(log.JSON, log.DebugLevel, nil, pname); err != nil {
-				log.Warnw("unable-to-add-log-package", log.Fields{"package-name": pname, "error": err})
-			}
 			if l, err := log.StringToLogLevel(level); err == nil {
-				log.SetPackageLogLevel(pname, l)
+				log.SetPackageLogLevel(key, l)
 			}
 		}
 	}
-	log.Debugw("updated-log-level", log.Fields{"current-log-level": currentLogLevel})
 }
 
 // generate md5 hash of key value pairs appended into a single string
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/backend.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/backend.go
index 04fe35d..faa86ed 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/backend.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/backend.go
@@ -222,7 +222,7 @@
 	defer b.Unlock()
 
 	formattedPath := b.makePath(key)
-	logger.Debugw("putting-key", log.Fields{"key": key, "value": string(value.([]byte)), "path": formattedPath})
+	logger.Debugw("putting-key", log.Fields{"key": key, "value": value, "path": formattedPath})
 
 	err := b.Client.Put(ctx, formattedPath, value)
 
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore/etcdclient.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore/etcdclient.go
index 1014ada..d38f0f6 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore/etcdclient.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/db/kvstore/etcdclient.go
@@ -29,13 +29,13 @@
 
 // EtcdClient represents the Etcd KV store client
 type EtcdClient struct {
-	ectdAPI          *v3Client.Client
-	keyReservations  map[string]*v3Client.LeaseID
-	watchedChannels  sync.Map
-	writeLock        sync.Mutex
-	lockToMutexMap   map[string]*v3Concurrency.Mutex
-	lockToSessionMap map[string]*v3Concurrency.Session
-	lockToMutexLock  sync.Mutex
+	ectdAPI             *v3Client.Client
+	keyReservations     map[string]*v3Client.LeaseID
+	watchedChannels     sync.Map
+	keyReservationsLock sync.RWMutex
+	lockToMutexMap      map[string]*v3Concurrency.Mutex
+	lockToSessionMap    map[string]*v3Concurrency.Session
+	lockToMutexLock     sync.Mutex
 }
 
 // NewEtcdClient returns a new client for the Etcd KV store
@@ -114,13 +114,13 @@
 		return fmt.Errorf("unexpected-type-%T", value)
 	}
 
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
-
 	var err error
 	// Check if there is already a lease for this key - if there is then use it, otherwise a PUT will make
 	// that KV key permanent instead of automatically removing it after a lease expiration
-	if leaseID, ok := c.keyReservations[key]; ok {
+	c.keyReservationsLock.RLock()
+	leaseID, ok := c.keyReservations[key]
+	c.keyReservationsLock.RUnlock()
+	if ok {
 		_, err = c.ectdAPI.Put(ctx, key, val, v3Client.WithLease(*leaseID))
 	} else {
 		_, err = c.ectdAPI.Put(ctx, key, val)
@@ -146,9 +146,6 @@
 // wait for a response
 func (c *EtcdClient) Delete(ctx context.Context, key string) error {
 
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
-
 	// delete the key
 	if _, err := c.ectdAPI.Delete(ctx, key); err != nil {
 		logger.Errorw("failed-to-delete-key", log.Fields{"key": key, "error": err})
@@ -177,9 +174,9 @@
 		return nil, err
 	}
 	// Register the lease id
-	c.writeLock.Lock()
+	c.keyReservationsLock.Lock()
 	c.keyReservations[key] = &resp.ID
-	c.writeLock.Unlock()
+	c.keyReservationsLock.Unlock()
 
 	// Revoke lease if reservation is not successful
 	reservationSuccessful := false
@@ -235,8 +232,8 @@
 
 // ReleaseAllReservations releases all key reservations previously made (using Reserve API)
 func (c *EtcdClient) ReleaseAllReservations(ctx context.Context) error {
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
+	c.keyReservationsLock.Lock()
+	defer c.keyReservationsLock.Unlock()
 
 	for key, leaseID := range c.keyReservations {
 		_, err := c.ectdAPI.Revoke(ctx, *leaseID)
@@ -255,8 +252,8 @@
 	logger.Debugw("Release-reservation", log.Fields{"key": key})
 	var ok bool
 	var leaseID *v3Client.LeaseID
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
+	c.keyReservationsLock.Lock()
+	defer c.keyReservationsLock.Unlock()
 	if leaseID, ok = c.keyReservations[key]; !ok {
 		return nil
 	}
@@ -278,9 +275,11 @@
 	// Get the leaseid using the key
 	var ok bool
 	var leaseID *v3Client.LeaseID
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
-	if leaseID, ok = c.keyReservations[key]; !ok {
+	c.keyReservationsLock.RLock()
+	leaseID, ok = c.keyReservations[key]
+	c.keyReservationsLock.RUnlock()
+
+	if !ok {
 		return errors.New("key-not-reserved")
 	}
 
@@ -372,8 +371,6 @@
 	// Get the array of channels mapping
 	var watchedChannels []map[chan *Event]v3Client.Watcher
 	var ok bool
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
 
 	if watchedChannels, ok = c.getChannelMaps(key); !ok {
 		logger.Warnw("key-has-no-watched-channels", log.Fields{"key": key})
@@ -425,8 +422,6 @@
 
 // Close closes the KV store client
 func (c *EtcdClient) Close() {
-	c.writeLock.Lock()
-	defer c.writeLock.Unlock()
 	if err := c.ectdAPI.Close(); err != nil {
 		logger.Errorw("error-closing-client", log.Fields{"error": err})
 	}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/flows/flow_utils.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/flows/flow_utils.go
index 4de929f..b2086cd 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/flows/flow_utils.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/flows/flow_utils.go
@@ -18,6 +18,7 @@
 import (
 	"bytes"
 	"crypto/md5"
+	"errors"
 	"fmt"
 	"github.com/cevaris/ordered_map"
 	"github.com/gogo/protobuf/proto"
@@ -678,9 +679,9 @@
 
 // Return unique 64-bit integer hash for flow covering the following attributes:
 // 'table_id', 'priority', 'flags', 'cookie', 'match', '_instruction_string'
-func HashFlowStats(flow *ofp.OfpFlowStats) uint64 {
+func HashFlowStats(flow *ofp.OfpFlowStats) (uint64, error) {
 	if flow == nil { // Should never happen
-		return 0
+		return 0, errors.New("hash-flow-stats-nil-flow")
 	}
 	// Create string with the instructions field first
 	var instructionString bytes.Buffer
@@ -690,19 +691,18 @@
 	var flowString = fmt.Sprintf("%d%d%d%d%s%s", flow.TableId, flow.Priority, flow.Flags, flow.Cookie, flow.Match.String(), instructionString.String())
 	h := md5.New()
 	if _, err := h.Write([]byte(flowString)); err != nil {
-		logger.Errorw("hash-flow-status", log.Fields{"error": err})
-		return 0
+		return 0, fmt.Errorf("hash-flow-stats-failed-hash: %v", err)
 	}
 	hash := big.NewInt(0)
 	hash.SetBytes(h.Sum(nil))
-	return hash.Uint64()
+	return hash.Uint64(), nil
 }
 
 // flowStatsEntryFromFlowModMessage maps an ofp_flow_mod message to an ofp_flow_stats message
-func FlowStatsEntryFromFlowModMessage(mod *ofp.OfpFlowMod) *ofp.OfpFlowStats {
+func FlowStatsEntryFromFlowModMessage(mod *ofp.OfpFlowMod) (*ofp.OfpFlowStats, error) {
 	flow := &ofp.OfpFlowStats{}
 	if mod == nil {
-		return flow
+		return flow, nil
 	}
 	flow.TableId = mod.TableId
 	flow.Priority = mod.Priority
@@ -712,8 +712,12 @@
 	flow.Cookie = mod.Cookie
 	flow.Match = mod.Match
 	flow.Instructions = mod.Instructions
-	flow.Id = HashFlowStats(flow)
-	return flow
+	var err error
+	if flow.Id, err = HashFlowStats(flow); err != nil {
+		return nil, err
+	}
+
+	return flow, nil
 }
 
 func GroupEntryFromGroupMod(mod *ofp.OfpGroupMod) *ofp.OfpGroupEntry {
@@ -913,7 +917,7 @@
 }
 
 // MkFlowStat is a helper method to build flows
-func MkFlowStat(fa *FlowArgs) *ofp.OfpFlowStats {
+func MkFlowStat(fa *FlowArgs) (*ofp.OfpFlowStats, error) {
 	//Build the match-fields
 	matchFields := make([]*ofp.OfpOxmField, 0)
 	for _, val := range fa.MatchFields {
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/kafka_inter_container_library.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/kafka_inter_container_library.go
index 91b2143..5dbde9c 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/kafka_inter_container_library.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/kafka_inter_container_library.go
@@ -19,6 +19,8 @@
 	"context"
 	"errors"
 	"fmt"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 	"reflect"
 	"strings"
 	"sync"
@@ -34,7 +36,7 @@
 
 const (
 	DefaultMaxRetries     = 3
-	DefaultRequestTimeout = 10000 // 10000 milliseconds - to handle a wider latency range
+	DefaultRequestTimeout = 60000 // 60000 milliseconds - to handle a wider latency range
 )
 
 const (
@@ -66,6 +68,7 @@
 	GetDefaultTopic() *Topic
 	DeviceDiscovered(deviceId string, deviceType string, parentId string, publisher string) error
 	InvokeRPC(ctx context.Context, rpc string, toTopic *Topic, replyToTopic *Topic, waitForResponse bool, key string, kvArgs ...*KVArg) (bool, *any.Any)
+	InvokeAsyncRPC(ctx context.Context, rpc string, toTopic *Topic, replyToTopic *Topic, waitForResponse bool, key string, kvArgs ...*KVArg) chan *RpcResponse
 	SubscribeWithRequestHandlerInterface(topic Topic, handler interface{}) error
 	SubscribeWithDefaultRequestHandler(topic Topic, initialOffset int64) error
 	UnSubscribeFromRequestHandler(topic Topic) error
@@ -246,6 +249,104 @@
 	return nil
 }
 
+// InvokeAsyncRPC is used to make an RPC request asynchronously
+func (kp *interContainerProxy) InvokeAsyncRPC(ctx context.Context, rpc string, toTopic *Topic, replyToTopic *Topic,
+	waitForResponse bool, key string, kvArgs ...*KVArg) chan *RpcResponse {
+
+	logger.Debugw("InvokeAsyncRPC", log.Fields{"rpc": rpc, "key": key})
+	//	If a replyToTopic is provided then we use it, otherwise just use the  default toTopic.  The replyToTopic is
+	// typically the device ID.
+	responseTopic := replyToTopic
+	if responseTopic == nil {
+		responseTopic = kp.GetDefaultTopic()
+	}
+
+	chnl := make(chan *RpcResponse)
+
+	go func() {
+
+		// once we're done,
+		// close the response channel
+		defer close(chnl)
+
+		var err error
+		var protoRequest *ic.InterContainerMessage
+
+		// Encode the request
+		protoRequest, err = encodeRequest(rpc, toTopic, responseTopic, key, kvArgs...)
+		if err != nil {
+			logger.Warnw("cannot-format-request", log.Fields{"rpc": rpc, "error": err})
+			chnl <- NewResponse(RpcFormattingError, err, nil)
+			return
+		}
+
+		// Subscribe for response, if needed, before sending request
+		var ch <-chan *ic.InterContainerMessage
+		if ch, err = kp.subscribeForResponse(*responseTopic, protoRequest.Header.Id); err != nil {
+			logger.Errorw("failed-to-subscribe-for-response", log.Fields{"error": err, "toTopic": toTopic.Name})
+			chnl <- NewResponse(RpcTransportError, err, nil)
+			return
+		}
+
+		// Send request - if the topic is formatted with a device Id then we will send the request using a
+		// specific key, hence ensuring a single partition is used to publish the request.  This ensures that the
+		// subscriber on that topic will receive the request in the order it was sent.  The key used is the deviceId.
+		logger.Debugw("sending-msg", log.Fields{"rpc": rpc, "toTopic": toTopic, "replyTopic": responseTopic, "key": key, "xId": protoRequest.Header.Id})
+
+		// if the message is not sent on kafka publish an event an close the channel
+		if err = kp.kafkaClient.Send(protoRequest, toTopic, key); err != nil {
+			chnl <- NewResponse(RpcTransportError, err, nil)
+			return
+		}
+
+		// if the client is not waiting for a response send the ack and close the channel
+		chnl <- NewResponse(RpcSent, nil, nil)
+		if !waitForResponse {
+			return
+		}
+
+		defer func() {
+			// Remove the subscription for a response on return
+			if err := kp.unSubscribeForResponse(protoRequest.Header.Id); err != nil {
+				logger.Warnw("invoke-async-rpc-unsubscriber-for-response-failed", log.Fields{"err": err})
+			}
+		}()
+
+		// Wait for response as well as timeout or cancellation
+		select {
+		case msg, ok := <-ch:
+			if !ok {
+				logger.Warnw("channel-closed", log.Fields{"rpc": rpc, "replyTopic": replyToTopic.Name})
+				chnl <- NewResponse(RpcTransportError, status.Error(codes.Aborted, "channel closed"), nil)
+			}
+			logger.Debugw("received-response", log.Fields{"rpc": rpc, "msgHeader": msg.Header})
+			if responseBody, err := decodeResponse(msg); err != nil {
+				chnl <- NewResponse(RpcReply, err, nil)
+			} else {
+				if responseBody.Success {
+					chnl <- NewResponse(RpcReply, nil, responseBody.Result)
+				} else {
+					// response body contains an error
+					unpackErr := &ic.Error{}
+					if err := ptypes.UnmarshalAny(responseBody.Result, unpackErr); err != nil {
+						chnl <- NewResponse(RpcReply, err, nil)
+					} else {
+						chnl <- NewResponse(RpcReply, status.Error(codes.Internal, unpackErr.Reason), nil)
+					}
+				}
+			}
+		case <-ctx.Done():
+			logger.Errorw("context-cancelled", log.Fields{"rpc": rpc, "ctx": ctx.Err()})
+			err := status.Error(codes.DeadlineExceeded, ctx.Err().Error())
+			chnl <- NewResponse(RpcTimeout, err, nil)
+		case <-kp.doneCh:
+			chnl <- NewResponse(RpcSystemClosing, nil, nil)
+			logger.Warnw("received-exit-signal", log.Fields{"toTopic": toTopic.Name, "rpc": rpc})
+		}
+	}()
+	return chnl
+}
+
 // InvokeRPC is used to send a request to a given topic
 func (kp *interContainerProxy) InvokeRPC(ctx context.Context, rpc string, toTopic *Topic, replyToTopic *Topic,
 	waitForResponse bool, key string, kvArgs ...*KVArg) (bool, *any.Any) {
@@ -799,7 +900,8 @@
 
 	// Create a specific channel for this consumers.  We cannot use the channel from the kafkaclient as it will
 	// broadcast any message for this topic to all channels waiting on it.
-	ch := make(chan *ic.InterContainerMessage)
+	// Set channel size to 1 to prevent deadlock, see VOL-2708
+	ch := make(chan *ic.InterContainerMessage, 1)
 	kp.addToTransactionIdToChannelMap(trnsId, &topic, ch)
 
 	return ch, nil
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/utils.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/utils.go
index 0cb9535..bdc615f 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/utils.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/kafka/utils.go
@@ -15,7 +15,10 @@
  */
 package kafka
 
-import "strings"
+import (
+	"github.com/golang/protobuf/ptypes/any"
+	"strings"
+)
 
 const (
 	TopicSeparator = "_"
@@ -36,6 +39,31 @@
 	Value interface{}
 }
 
+type RpcMType int
+
+const (
+	RpcFormattingError RpcMType = iota
+	RpcSent
+	RpcReply
+	RpcTimeout
+	RpcTransportError
+	RpcSystemClosing
+)
+
+type RpcResponse struct {
+	MType RpcMType
+	Err   error
+	Reply *any.Any
+}
+
+func NewResponse(messageType RpcMType, err error, body *any.Any) *RpcResponse {
+	return &RpcResponse{
+		MType: messageType,
+		Err:   err,
+		Reply: body,
+	}
+}
+
 // TODO:  Remove and provide better may to get the device id
 // GetDeviceIdFromTopic extract the deviceId from the topic name.  The topic name is formatted either as:
 //			<any string> or <any string>_<deviceId>.  The device Id is 24 characters long.
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/log.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/log.go
index 3ebdd3a..47fa3fb 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/log.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/log.go
@@ -221,6 +221,7 @@
 			LevelKey:       "level",
 			MessageKey:     "msg",
 			TimeKey:        "ts",
+			CallerKey:      "caller",
 			StacktraceKey:  "stacktrace",
 			LineEnding:     zc.DefaultLineEnding,
 			EncodeLevel:    zc.LowercaseLevelEncoder,
@@ -237,7 +238,7 @@
 	// Build a custom config using zap
 	cfg = getDefaultConfig(outputType, level, defaultFields)
 
-	l, err := cfg.Build()
+	l, err := cfg.Build(zp.AddCallerSkip(1))
 	if err != nil {
 		return nil, err
 	}
@@ -282,7 +283,7 @@
 
 	cfgs[pkgName] = getDefaultConfig(outputType, level, defaultFields)
 
-	l, err := cfgs[pkgName].Build()
+	l, err := cfgs[pkgName].Build(zp.AddCallerSkip(1))
 	if err != nil {
 		return nil, err
 	}
@@ -304,16 +305,14 @@
 			}
 			cfg.InitialFields[k] = v
 		}
-		l, err := cfg.Build()
+		l, err := cfg.Build(zp.AddCallerSkip(1))
 		if err != nil {
 			return err
 		}
 
-		loggers[pkgName] = &logger{
-			log:         l.Sugar(),
-			parent:      l,
-			packageName: pkgName,
-		}
+		// Update the existing zap logger instance
+		loggers[pkgName].log = l.Sugar()
+		loggers[pkgName].parent = l
 	}
 	return nil
 }
@@ -329,19 +328,16 @@
 	return keys
 }
 
-// UpdateLogger deletes the logger associated with a caller's package and creates a new logger with the
-// defaultFields.  If a calling package is holding on to a Logger reference obtained from AddPackage invocation, then
-// that package needs to invoke UpdateLogger if it needs to make changes to the default fields and obtain a new logger
-// reference
-func UpdateLogger(defaultFields Fields) (Logger, error) {
+// UpdateLogger updates the logger associated with a caller's package with supplied defaultFields
+func UpdateLogger(defaultFields Fields) error {
 	pkgName, _, _, _ := getCallerInfo()
 	if _, exist := loggers[pkgName]; !exist {
-		return nil, fmt.Errorf("package-%s-not-registered", pkgName)
+		return fmt.Errorf("package-%s-not-registered", pkgName)
 	}
 
 	// Build a new logger
 	if _, exist := cfgs[pkgName]; !exist {
-		return nil, fmt.Errorf("config-%s-not-registered", pkgName)
+		return fmt.Errorf("config-%s-not-registered", pkgName)
 	}
 
 	cfg := cfgs[pkgName]
@@ -351,18 +347,16 @@
 		}
 		cfg.InitialFields[k] = v
 	}
-	l, err := cfg.Build()
+	l, err := cfg.Build(zp.AddCallerSkip(1))
 	if err != nil {
-		return nil, err
+		return err
 	}
 
-	// Set the logger
-	loggers[pkgName] = &logger{
-		log:         l.Sugar(),
-		parent:      l,
-		packageName: pkgName,
-	}
-	return loggers[pkgName], nil
+	// Update the existing zap logger instance
+	loggers[pkgName].log = l.Sugar()
+	loggers[pkgName].parent = l
+
+	return nil
 }
 
 func setLevel(cfg zp.Config, level LogLevel) {
diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/ponresourcemanager/ponresourcemanager.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/ponresourcemanager/ponresourcemanager.go
index 6ed18e9..79fefc5 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/ponresourcemanager/ponresourcemanager.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/ponresourcemanager/ponresourcemanager.go
@@ -42,6 +42,16 @@
 	//Constants for passing command line arugments
 	OLT_MODEL_ARG = "--olt_model"
 	PATH_PREFIX   = "service/voltha/resource_manager/{%s}"
+
+	/*The path under which configuration data is stored is defined as technology/device agnostic.
+	  That means the path does not include any specific technology/device variable. Using technology/device
+	  agnostic path also makes northbound applications, that need to write to this path,
+	  technology/device agnostic.
+
+	  Default kv client of PonResourceManager reads from/writes to PATH_PREFIX defined above.
+	  That is why, an additional kv client (named KVStoreForConfig) is defined to read from the config path.
+	*/
+	PATH_PREFIX_FOR_CONFIG = "service/voltha/resource_manager/config"
 	/*The resource ranges for a given device model should be placed
 	  at 'resource_manager/<technology>/resource_ranges/<olt_model_type>'
 	  path on the KV store.
@@ -115,6 +125,9 @@
 	NUM_OF_PON_INTF = 16
 
 	KVSTORE_RETRY_TIMEOUT = 5
+	//Path on the KV store for storing reserved gem ports
+	//Format: reserved_gemport_ids
+	RESERVED_GEMPORT_IDS_PATH = "reserved_gemport_ids"
 )
 
 //type ResourceTypeIndex string
@@ -122,15 +135,16 @@
 
 type PONResourceManager struct {
 	//Implements APIs to initialize/allocate/release alloc/gemport/onu IDs.
-	Technology     string
-	DeviceType     string
-	DeviceID       string
-	Backend        string // ETCD, or consul
-	Host           string // host ip of the KV store
-	Port           int    // port number for the KV store
-	OLTModel       string
-	KVStore        *db.Backend
-	TechProfileMgr tp.TechProfileIf // create object of *tp.TechProfileMgr
+	Technology       string
+	DeviceType       string
+	DeviceID         string
+	Backend          string // ETCD, or consul
+	Host             string // host ip of the KV store
+	Port             int    // port number for the KV store
+	OLTModel         string
+	KVStore          *db.Backend
+	KVStoreForConfig *db.Backend
+	TechProfileMgr   tp.TechProfileIf // create object of *tp.TechProfileMgr
 
 	// Below attribute, pon_resource_ranges, should be initialized
 	// by reading from KV store.
@@ -152,7 +166,7 @@
 	return nil, errors.New("unsupported-kv-store")
 }
 
-func SetKVClient(Technology string, Backend string, Host string, Port int) *db.Backend {
+func SetKVClient(Technology string, Backend string, Host string, Port int, configClient bool) *db.Backend {
 	addr := Host + ":" + strconv.Itoa(Port)
 	// TODO : Make sure direct call to NewBackend is working fine with backend , currently there is some
 	// issue between kv store and backend , core is not calling NewBackend directly
@@ -161,13 +175,21 @@
 		log.Fatalw("Failed to init KV client\n", log.Fields{"err": err})
 		return nil
 	}
+
+	var pathPrefix string
+	if configClient {
+		pathPrefix = PATH_PREFIX_FOR_CONFIG
+	} else {
+		pathPrefix = fmt.Sprintf(PATH_PREFIX, Technology)
+	}
+
 	kvbackend := &db.Backend{
 		Client:     kvClient,
 		StoreType:  Backend,
 		Host:       Host,
 		Port:       Port,
 		Timeout:    KVSTORE_RETRY_TIMEOUT,
-		PathPrefix: fmt.Sprintf(PATH_PREFIX, Technology)}
+		PathPrefix: pathPrefix}
 
 	return kvbackend
 }
@@ -181,11 +203,17 @@
 	PONMgr.Backend = Backend
 	PONMgr.Host = Host
 	PONMgr.Port = Port
-	PONMgr.KVStore = SetKVClient(Technology, Backend, Host, Port)
+	PONMgr.KVStore = SetKVClient(Technology, Backend, Host, Port, false)
 	if PONMgr.KVStore == nil {
 		log.Error("KV Client initilization failed")
 		return nil, errors.New("Failed to init KV client")
 	}
+	// init kv client to read from the config path
+	PONMgr.KVStoreForConfig = SetKVClient(Technology, Backend, Host, Port, true)
+	if PONMgr.KVStoreForConfig == nil {
+		log.Error("KV Config Client initilization failed")
+		return nil, errors.New("Failed to init KV Config client")
+	}
 	// Initialize techprofile for this technology
 	if PONMgr.TechProfileMgr, _ = tp.NewTechProfile(&PONMgr, Backend, Host, Port); PONMgr.TechProfileMgr == nil {
 		log.Error("Techprofile initialization failed")
@@ -493,7 +521,15 @@
 		log.Debugf("Resource %s already present in store ", Path)
 		return nil
 	} else {
-		FormatResult, err := PONRMgr.FormatResource(Intf, StartID, EndID)
+		var excluded []uint32
+		if ResourceType == GEMPORT_ID {
+			//get gem port ids defined in the KV store, if any, and exclude them from the gem port id pool
+			if reservedGemPortIds, defined := PONRMgr.getReservedGemPortIdsFromKVStore(ctx); defined {
+				excluded = reservedGemPortIds
+				log.Debugw("Excluding some ports from GEM port id pool", log.Fields{"excluded gem ports": excluded})
+			}
+		}
+		FormatResult, err := PONRMgr.FormatResource(Intf, StartID, EndID, excluded)
 		if err != nil {
 			log.Errorf("Failed to format resource")
 			return err
@@ -511,12 +547,38 @@
 	return err
 }
 
-func (PONRMgr *PONResourceManager) FormatResource(IntfID uint32, StartIDx uint32, EndIDx uint32) ([]byte, error) {
+func (PONRMgr *PONResourceManager) getReservedGemPortIdsFromKVStore(ctx context.Context) ([]uint32, bool) {
+	var reservedGemPortIds []uint32
+	// read reserved gem ports from the config path
+	KvPair, err := PONRMgr.KVStoreForConfig.Get(ctx, RESERVED_GEMPORT_IDS_PATH)
+	if err != nil {
+		log.Errorw("Unable to get reserved GEM port ids from the kv store", log.Fields{"err": err})
+		return reservedGemPortIds, false
+	}
+	if KvPair == nil || KvPair.Value == nil {
+		//no reserved gem port defined in the store
+		return reservedGemPortIds, false
+	}
+	Val, err := kvstore.ToByte(KvPair.Value)
+	if err != nil {
+		log.Errorw("Failed to convert reserved gem port ids into byte array", log.Fields{"err": err})
+		return reservedGemPortIds, false
+	}
+	if err = json.Unmarshal(Val, &reservedGemPortIds); err != nil {
+		log.Errorw("Failed to unmarshal reservedGemPortIds", log.Fields{"err": err})
+		return reservedGemPortIds, false
+	}
+	return reservedGemPortIds, true
+}
+
+func (PONRMgr *PONResourceManager) FormatResource(IntfID uint32, StartIDx uint32, EndIDx uint32,
+	Excluded []uint32) ([]byte, error) {
 	/*
 	   Format resource as json.
 	   :param pon_intf_id: OLT PON interface id
 	   :param start_idx: start index for id pool
 	   :param end_idx: end index for id pool
+	   :Id values to be Excluded from the pool
 	   :return dictionary: resource formatted as map
 	*/
 	// Format resource as json to be stored in backend store
@@ -534,6 +596,14 @@
 		log.Error("Failed to create a bitmap")
 		return nil, errors.New("Failed to create bitmap")
 	}
+	for _, excludedID := range Excluded {
+		if excludedID < StartIDx || excludedID > EndIDx {
+			log.Warnf("Cannot reserve %d. It must be in the range of [%d, %d]", excludedID,
+				StartIDx, EndIDx)
+			continue
+		}
+		PONRMgr.reserveID(TSData, StartIDx, excludedID)
+	}
 	Resource[POOL] = TSData.Data(false) //we pass false so as the TSData lib api does not do a copy of the data and return
 
 	Value, err := json.Marshal(Resource)
@@ -1147,6 +1217,21 @@
 	return true
 }
 
+/* Reserves a unique id in the specified resource pool.
+:param Resource: resource used to reserve ID
+:param Id: ID to be reserved
+*/
+func (PONRMgr *PONResourceManager) reserveID(TSData *bitmap.Threadsafe, StartIndex uint32, Id uint32) bool {
+	Data := bitmap.TSFromData(TSData.Data(false), false)
+	if Data == nil {
+		log.Error("Failed to get resource pool")
+		return false
+	}
+	Idx := Id - StartIndex
+	Data.Set(int(Idx), true)
+	return true
+}
+
 func (PONRMgr *PONResourceManager) GetTechnology() string {
 	return PONRMgr.Technology
 }
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 3b97659..20c4eb0 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -63,7 +63,7 @@
 github.com/mitchellh/go-homedir
 # github.com/mitchellh/mapstructure v1.1.2
 github.com/mitchellh/mapstructure
-# github.com/opencord/voltha-lib-go/v3 v3.0.14
+# github.com/opencord/voltha-lib-go/v3 v3.0.23
 github.com/opencord/voltha-lib-go/v3/pkg/adapters
 github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif
 github.com/opencord/voltha-lib-go/v3/pkg/adapters/common