diff --git a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowModBuilder.java b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowModBuilder.java
index b2e7cf4..8c009a7 100644
--- a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowModBuilder.java
+++ b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowModBuilder.java
@@ -88,6 +88,24 @@
 
     }
 
+    public OFFlowMod buildFlowDel() {
+        Match match = buildMatch();
+        List<OFAction> actions = buildActions();
+
+        OFFlowMod fm = factory.buildFlowDelete()
+                .setCookie(U64.of(cookie.value()))
+                .setBufferId(OFBufferId.NO_BUFFER)
+                .setActions(actions)
+                .setMatch(match)
+                .setFlags(Collections.singleton(OFFlowModFlags.SEND_FLOW_REM))
+                .setIdleTimeout(10)
+                .setHardTimeout(10)
+                .setPriority(priority)
+                .build();
+
+        return fm;
+    }
+
     private List<OFAction> buildActions() {
         List<OFAction> acts = new LinkedList<>();
         for (Instruction i : treatment.instructions()) {
@@ -246,4 +264,6 @@
         return mBuilder.build();
     }
 
+
+
 }
diff --git a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowRuleBuilder.java b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowRuleBuilder.java
index 49ee9b9..d6c3c2d 100644
--- a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowRuleBuilder.java
+++ b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowRuleBuilder.java
@@ -53,7 +53,7 @@
         this.match = entry.getMatch();
         this.actions = entry.getActions();
         this.dpid = dpid;
-        removed = null;
+        this.removed = null;
     }
 
     public FlowRuleBuilder(Dpid dpid, OFFlowRemoved removed) {
@@ -72,14 +72,14 @@
                     buildSelector(), buildTreatment(), stat.getPriority(),
                     FlowRuleState.ADDED, stat.getDurationNsec() / 1000000,
                     stat.getPacketCount().getValue(), stat.getByteCount().getValue(),
-                    (int) (stat.getCookie().getValue() & 0xFFFFFFFF));
+                    stat.getCookie().getValue());
         } else {
             // TODO: revisit potentially.
             return new DefaultFlowRule(DeviceId.deviceId(Dpid.uri(dpid)),
                     buildSelector(), null, removed.getPriority(),
                     FlowRuleState.REMOVED, removed.getDurationNsec() / 1000000,
                     removed.getPacketCount().getValue(), removed.getByteCount().getValue(),
-                    (int) (removed.getCookie().getValue() & 0xFFFFFFFF));
+                    removed.getCookie().getValue());
         }
     }
 
diff --git a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java
index 7cb4fdf..7ddc65d 100644
--- a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java
+++ b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java
@@ -95,11 +95,19 @@
 
     @Override
     public void removeFlowRule(FlowRule... flowRules) {
-        // TODO Auto-generated method stub
+        for (int i = 0; i < flowRules.length; i++) {
+            removeRule(flowRules[i]);
+        }
 
     }
 
 
+    private void removeRule(FlowRule flowRule) {
+        OpenFlowSwitch sw = controller.getSwitch(Dpid.dpid(flowRule.deviceId().uri()));
+        sw.sendMsg(new FlowModBuilder(flowRule, sw.factory()).buildFlowDel());
+    }
+
+
     //TODO: InternalFlowRuleProvider listening to stats and error and flowremoved.
     // possibly barriers as well. May not be internal at all...
     private class InternalFlowProvider
@@ -109,7 +117,7 @@
 
         @Override
         public void switchAdded(Dpid dpid) {
-            FlowStatsCollector fsc = new FlowStatsCollector(controller.getSwitch(dpid), 1);
+            FlowStatsCollector fsc = new FlowStatsCollector(controller.getSwitch(dpid), 5);
             fsc.start();
             collectors.put(dpid, fsc);
         }