diff --git a/src/packages/discovery/store/discover/discover.action.ts b/src/packages/discovery/store/discover/discover.action.ts
index f25e152..733fd8d 100644
--- a/src/packages/discovery/store/discover/discover.action.ts
+++ b/src/packages/discovery/store/discover/discover.action.ts
@@ -17,6 +17,8 @@ import {
   DiscoverPort = '[discovery.discovery] discoverPort',
   DiscoverService = '[discovery.discovery] discoverService',
 
+  DiscoveryStart = '[discovery.discovery] DiscoveryService.discoveryStart',
+  DiscoveryStop = '[discovery.discovery] DiscoveryService.discoveryStop',
   DiscoveredZone = '[discovery.discovery] DiscoveryService.discoveredZone',
   DiscoveredHost = '[discovery.discovery] DiscoveryService.discoveredHost',
   DiscoveredPort = '[discovery.discovery] DiscoveryService.discoveredPort',
@@ -46,6 +48,17 @@ export class DiscoverService implements Action {
   constructor(public payload: {probeID: string, port: Port, discoveryService: MDiscoveryService}) {}
 }
 
+export class DiscoveryStart implements Action {
+  readonly type = ActionType.DiscoveryStart;
+
+  constructor(public payload: Date) {}
+}
+
+export class DiscoveryStop implements Action {
+  readonly type = ActionType.DiscoveryStop;
+
+  constructor(public payload: Date) {}
+}
 
 export class DiscoveredZone implements Action {
   readonly type = ActionType.DiscoveredZone;
@@ -75,6 +88,8 @@ export type Actions =
   | DiscoverHost
   | DiscoverPort
   | DiscoverService
+  | DiscoveryStart
+  | DiscoveryStop
   | DiscoveredZone
   | DiscoveredHost
   | DiscoveredPort
diff --git a/src/packages/discovery/store/discover/discover.reducer.ts b/src/packages/discovery/store/discover/discover.reducer.ts
index 84af354..35b78b2 100644
--- a/src/packages/discovery/store/discover/discover.reducer.ts
+++ b/src/packages/discovery/store/discover/discover.reducer.ts
@@ -19,6 +19,12 @@ import {
 
 export function reducer(state = initialState, action: Actions): State {
   switch (action.type) {
+    case ActionType.DiscoveryStart: {
+      return state;
+    }
+    case ActionType.DiscoveryStop: {
+      return state;
+    }
     case ActionType.DiscoveredZone: {
       const zone: Zone = <Zone>action.payload;
       const zones: Map<string, Zone> = null === state.zones ? new Map() : state.zones;
diff --git a/src/packages/discovery/subscriber/discovery.subscriber.ts b/src/packages/discovery/subscriber/discovery.subscriber.ts
index ef4d980..6d5bfec 100644
--- a/src/packages/discovery/subscriber/discovery.subscriber.ts
+++ b/src/packages/discovery/subscriber/discovery.subscriber.ts
@@ -22,6 +22,21 @@ export class DiscoverySubscriber {
   ) {
   }
 
+  @RPCSubscriber({method: 'DiscoveryService.discoveryStart'})
+  public discoveryStart(startDate: Date): void {
+    this.loggerService.debug('DiscoverySubscriber.discoveryStart startDate:', startDate);
+
+    this.store.dispatch(new DiscoverStore.DiscoveryStart(startDate));
+  }
+
+  @RPCSubscriber({method: 'DiscoveryService.discoveryStop'})
+  public discoveryStop(stopDate: Date): void {
+    this.loggerService.debug('DiscoverySubscriber.discoveryStop stopDate:', stopDate);
+
+    this.store.dispatch(new DiscoverStore.DiscoveryStop(stopDate));
+  }
+
+
   @RPCSubscriber({method: 'DiscoveryService.discoveredZone'})
   public discoveredZone(zone: Zone): void {
     this.loggerService.debug('DiscoverySubscriber.discoveredZone zone:', zone);
@@ -30,7 +45,7 @@ export class DiscoverySubscriber {
   }
   @RPCSubscriber({method: 'DiscoveryService.discoveredHost'})
   public discoveredHost(host: Host): void {
-    // this.loggerService.debug('DiscoverySubscriber.discoveredHost host:', host);
+    this.loggerService.debug('DiscoverySubscriber.discoveredHost host:', host);
 
     this.store.dispatch(new DiscoverStore.DiscoveredHost(host));
   }