diff --git a/core/api/src/main/java/org/onosproject/net/flow/FlowRuleService.java b/core/api/src/main/java/org/onosproject/net/flow/FlowRuleService.java
index 9b8ef81..52af84a 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/FlowRuleService.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/FlowRuleService.java
@@ -61,6 +61,12 @@
     void applyFlowRules(FlowRule... flowRules);
 
     /**
+     * Purges all the flow rules on the specified device.
+     * @param deviceId device identifier
+     */
+    void purgeFlowRules(DeviceId deviceId);
+
+    /**
      * Removes the specified flow rules from their respective devices. If the
      * device is not presently connected to the controller, these flow will
      * be removed once the device reconnects.
diff --git a/core/api/src/main/java/org/onosproject/net/group/GroupService.java b/core/api/src/main/java/org/onosproject/net/group/GroupService.java
index d56518a..369cc37 100644
--- a/core/api/src/main/java/org/onosproject/net/group/GroupService.java
+++ b/core/api/src/main/java/org/onosproject/net/group/GroupService.java
@@ -107,6 +107,12 @@
                                 ApplicationId appId);
 
     /**
+     * Purges all the group entries on the specified device.
+     * @param deviceId device identifier
+     */
+    void purgeGroupEntries(DeviceId deviceId);
+
+    /**
      * Deletes a group associated to an application cookie.
      * GROUP_DELETED or GROUP_DELETE_FAILED notifications would be
      * provided along with cookie depending on the result of the
diff --git a/core/api/src/test/java/org/onosproject/net/flow/FlowRuleServiceAdapter.java b/core/api/src/test/java/org/onosproject/net/flow/FlowRuleServiceAdapter.java
index a12308d..4335983 100644
--- a/core/api/src/test/java/org/onosproject/net/flow/FlowRuleServiceAdapter.java
+++ b/core/api/src/test/java/org/onosproject/net/flow/FlowRuleServiceAdapter.java
@@ -38,6 +38,10 @@
     }
 
     @Override
+    public void purgeFlowRules(DeviceId deviceId){
+    }
+
+    @Override
     public void removeFlowRules(FlowRule... flowRules) {
     }