diff --git a/core/api/src/main/java/org/onosproject/net/packet/PacketStore.java b/core/api/src/main/java/org/onosproject/net/packet/PacketStore.java
index 97f7cb5..d83fc9a 100644
--- a/core/api/src/main/java/org/onosproject/net/packet/PacketStore.java
+++ b/core/api/src/main/java/org/onosproject/net/packet/PacketStore.java
@@ -37,17 +37,15 @@
      * Requests intercept of packets that match the given selector.
      *
      * @param request a packet request
-     * @return true if the first time the given selector was requested
      */
-    boolean requestPackets(PacketRequest request);
+    void requestPackets(PacketRequest request);
 
     /**
      * Cancels intercept of packets that match the given selector.
      *
      * @param request a packet request
-     * @return true if there is no other application requesting the given selector
      */
-    boolean cancelPackets(PacketRequest request);
+    void cancelPackets(PacketRequest request);
 
     /**
      * Obtains all existing requests in the system.
diff --git a/core/api/src/main/java/org/onosproject/net/packet/PacketStoreDelegate.java b/core/api/src/main/java/org/onosproject/net/packet/PacketStoreDelegate.java
index bf5c3cc..2e59b19 100644
--- a/core/api/src/main/java/org/onosproject/net/packet/PacketStoreDelegate.java
+++ b/core/api/src/main/java/org/onosproject/net/packet/PacketStoreDelegate.java
@@ -21,4 +21,20 @@
  * Packet store delegate abstraction.
  */
 public interface PacketStoreDelegate extends StoreDelegate<PacketEvent> {
+
+    /**
+     * Requests that packets matching to following request be collected
+     * from all switches.
+     *
+     * @param request packet request
+     */
+    void requestPackets(PacketRequest request);
+
+    /**
+     * Requests that packets matching to following request no longer be
+     * collected from any switches.
+     *
+     * @param request packet request
+     */
+    void cancelPackets(PacketRequest request);
 }