diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java
index 960eb02..352f604 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficSelector.java
@@ -188,7 +188,7 @@
         }
 
         @Override
-        public Builder matchOpticalSignalType(Byte signalType) {
+        public Builder matchOpticalSignalType(Short signalType) {
             return add(Criteria.matchOpticalSignalType(signalType));
 
         }
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchEvent.java b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchEvent.java
index d5c762d..1dbf8bd 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchEvent.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchEvent.java
@@ -27,11 +27,14 @@
      */
     public enum Type {
 
+        // Request has been forwarded to MASTER Node
         /**
          * Signifies that a batch operation has been initiated.
          */
         BATCH_OPERATION_REQUESTED,
 
+        // MASTER Node has pushed the batch down to the Device
+        // (e.g., Received barrier reply)
         /**
          * Signifies that a batch operation has completed.
          */
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchRequest.java b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchRequest.java
index 4a2bcf9..f75c663 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchRequest.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleBatchRequest.java
@@ -25,29 +25,29 @@
 public class FlowRuleBatchRequest {
 
     private final int batchId;
-    private final List<FlowEntry> toAdd;
-    private final List<FlowEntry> toRemove;
+    private final List<FlowRule> toAdd;
+    private final List<FlowRule> toRemove;
 
-    public FlowRuleBatchRequest(int batchId, List<? extends FlowEntry> toAdd, List<? extends FlowEntry> toRemove) {
+    public FlowRuleBatchRequest(int batchId, List<? extends FlowRule> toAdd, List<? extends FlowRule> toRemove) {
         this.batchId = batchId;
         this.toAdd = Collections.unmodifiableList(toAdd);
         this.toRemove = Collections.unmodifiableList(toRemove);
     }
 
-    public List<FlowEntry> toAdd() {
+    public List<FlowRule> toAdd() {
         return toAdd;
     }
 
-    public List<FlowEntry> toRemove() {
+    public List<FlowRule> toRemove() {
         return toRemove;
     }
 
     public FlowRuleBatchOperation asBatchOperation() {
         List<FlowRuleBatchEntry> entries = Lists.newArrayList();
-        for (FlowEntry e : toAdd) {
+        for (FlowRule e : toAdd) {
             entries.add(new FlowRuleBatchEntry(FlowRuleOperation.ADD, e));
         }
-        for (FlowEntry e : toRemove) {
+        for (FlowRule e : toRemove) {
             entries.add(new FlowRuleBatchEntry(FlowRuleOperation.REMOVE, e));
         }
         return new FlowRuleBatchOperation(entries);
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java b/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
index aaf0ece..dd8e2ae 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
@@ -147,7 +147,7 @@
          * @param signalType
          * @return a selection builder
          */
-        public Builder matchOpticalSignalType(Byte signalType);
+        public Builder matchOpticalSignalType(Short signalType);
 
         /**
          * Builds an immutable traffic selector.
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/criteria/Criteria.java b/core/api/src/main/java/org/onlab/onos/net/flow/criteria/Criteria.java
index aba5680..a1ac5f8 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/criteria/Criteria.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/criteria/Criteria.java
@@ -161,11 +161,11 @@
     /**
      * Creates a match on lambda field using the specified value.
      *
-     * @param lambda
+     * @param sigType
      * @return match criterion
      */
-    public static Criterion matchOpticalSignalType(Byte lambda) {
-        return new OpticalSignalTypeCriterion(lambda, Type.OCH_SIGTYPE);
+    public static Criterion matchOpticalSignalType(Short sigType) {
+        return new OpticalSignalTypeCriterion(sigType, Type.OCH_SIGTYPE);
     }
 
 
@@ -587,10 +587,10 @@
 
     public static final class OpticalSignalTypeCriterion implements Criterion {
 
-        private final byte signalType;
+        private final Short signalType;
         private final Type type;
 
-        public OpticalSignalTypeCriterion(byte signalType, Type type) {
+        public OpticalSignalTypeCriterion(Short signalType, Type type) {
             this.signalType = signalType;
             this.type = type;
         }
@@ -600,7 +600,7 @@
             return this.type;
         }
 
-        public Byte signalType() {
+        public Short signalType() {
             return this.signalType;
         }
 
diff --git a/core/net/src/main/java/org/onlab/onos/net/flow/impl/FlowRuleManager.java b/core/net/src/main/java/org/onlab/onos/net/flow/impl/FlowRuleManager.java
index 4fe9022..bd7fb94 100644
--- a/core/net/src/main/java/org/onlab/onos/net/flow/impl/FlowRuleManager.java
+++ b/core/net/src/main/java/org/onlab/onos/net/flow/impl/FlowRuleManager.java
@@ -371,10 +371,11 @@
             final FlowRuleBatchRequest request = event.subject();
             switch (event.type()) {
             case BATCH_OPERATION_REQUESTED:
-                for (FlowEntry entry : request.toAdd()) {
+                // Request has been forwarded to MASTER Node, and was
+                for (FlowRule entry : request.toAdd()) {
                     eventDispatcher.post(new FlowRuleEvent(FlowRuleEvent.Type.RULE_ADD_REQUESTED, entry));
                 }
-                for (FlowEntry entry : request.toRemove()) {
+                for (FlowRule entry : request.toRemove()) {
                     eventDispatcher.post(new FlowRuleEvent(FlowRuleEvent.Type.RULE_REMOVE_REQUESTED, entry));
                 }
                 // FIXME: what about op.equals(FlowRuleOperation.MODIFY) ?
@@ -392,21 +393,15 @@
                                                                                   Futures.getUnchecked(result)));
                     }
                 }, futureListeners);
+                break;
 
-                break;
             case BATCH_OPERATION_COMPLETED:
-                Set<FlowRule> failedItems = event.result().failedItems();
-                for (FlowEntry entry : request.toAdd()) {
-                    if (!failedItems.contains(entry)) {
-                        eventDispatcher.post(new FlowRuleEvent(FlowRuleEvent.Type.RULE_ADDED, entry));
-                    }
-                }
-                for (FlowEntry entry : request.toRemove()) {
-                    if (!failedItems.contains(entry)) {
-                            eventDispatcher.post(new FlowRuleEvent(FlowRuleEvent.Type.RULE_REMOVED, entry));
-                    }
-                }
+                // MASTER Node has pushed the batch down to the Device
+
+                // Note: RULE_ADDED will be posted
+                // when Flow was actually confirmed by stats reply.
                 break;
+
             default:
                 break;
             }
diff --git a/core/net/src/main/java/org/onlab/onos/net/intent/impl/OpticalPathIntentInstaller.java b/core/net/src/main/java/org/onlab/onos/net/intent/impl/OpticalPathIntentInstaller.java
index 5faae4d..27b5387 100644
--- a/core/net/src/main/java/org/onlab/onos/net/intent/impl/OpticalPathIntentInstaller.java
+++ b/core/net/src/main/java/org/onlab/onos/net/intent/impl/OpticalPathIntentInstaller.java
@@ -79,6 +79,7 @@
     private ApplicationId appId;
 
     //final short WAVELENGTH = 80;
+    static final short SIGNAL_TYPE = (short) 1;
 
     @Activate
     public void activate() {
@@ -151,7 +152,9 @@
 
             prev = link.dst();
             selectorBuilder.matchInport(link.dst().port());
+            selectorBuilder.matchOpticalSignalType(SIGNAL_TYPE); //todo
             selectorBuilder.matchLambda((short) la.toInt());
+
         }
 
         // build the last T port rule
diff --git a/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java b/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java
index b986d6d..f67d992 100644
--- a/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java
+++ b/core/net/src/test/java/org/onlab/onos/net/flow/impl/FlowRuleManagerTest.java
@@ -148,7 +148,7 @@
         int i = 0;
         System.err.println("events :" + listener.events);
         for (FlowRuleEvent e : listener.events) {
-            assertTrue("unexpected event", e.type().equals(events[i]));
+            assertEquals("unexpected event", events[i], e.type());
             i++;
         }
 
@@ -178,15 +178,13 @@
                        RULE_ADDED, RULE_ADDED);
 
         addFlowRule(1);
+        System.err.println("events :" + listener.events);
         assertEquals("should still be 2 rules", 2, flowCount());
 
         providerService.pushFlowMetrics(DID, ImmutableList.of(fe1));
         validateEvents(RULE_UPDATED);
     }
 
-
-    // TODO: If preserving iteration order is a requirement, redo FlowRuleStore.
-    //backing store is sensitive to the order of additions/removals
     private boolean validateState(Map<FlowRule, FlowEntryState> expected) {
         Map<FlowRule, FlowEntryState> expectedToCheck = new HashMap<>(expected);
         Iterable<FlowEntry> rules = service.getFlowEntries(DID);
@@ -539,17 +537,17 @@
 
             @Override
             public boolean cancel(boolean mayInterruptIfRunning) {
-                return true;
+                return false;
             }
 
             @Override
             public boolean isCancelled() {
-                return true;
+                return false;
             }
 
             @Override
             public boolean isDone() {
-                return false;
+                return true;
             }
 
             @Override
@@ -562,12 +560,14 @@
             public CompletedBatchOperation get(long timeout, TimeUnit unit)
                     throws InterruptedException,
                     ExecutionException, TimeoutException {
-                return null;
+                return new CompletedBatchOperation(true, Collections.<FlowRule>emptySet());
             }
 
             @Override
             public void addListener(Runnable task, Executor executor) {
-                // TODO: add stuff.
+                if (isDone()) {
+                    executor.execute(task);
+                }
             }
         }
 
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/mastership/impl/DistributedMastershipStore.java b/core/store/dist/src/main/java/org/onlab/onos/store/mastership/impl/DistributedMastershipStore.java
index c9d4422..713be4e 100644
--- a/core/store/dist/src/main/java/org/onlab/onos/store/mastership/impl/DistributedMastershipStore.java
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/mastership/impl/DistributedMastershipStore.java
@@ -447,7 +447,13 @@
             RoleValue oldValue = event.getOldValue();
             RoleValue newValue = event.getValue();
 
-            if (Objects.equal(oldValue.get(MASTER), newValue.get(MASTER))) {
+            NodeId oldMaster = null;
+            if (oldValue != null) {
+                oldMaster = oldValue.get(MASTER);
+            }
+            NodeId newMaster = newValue.get(MASTER);
+
+            if (Objects.equal(oldMaster, newMaster)) {
                 notifyDelegate(new MastershipEvent(
                         MASTER_CHANGED, event.getKey(), event.getValue().roleInfo()));
             } else {
diff --git a/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java b/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java
index 49b0c71..b7d26fb 100644
--- a/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java
+++ b/core/store/trivial/src/main/java/org/onlab/onos/store/trivial/impl/SimpleFlowRuleStore.java
@@ -16,8 +16,12 @@
 package org.onlab.onos.store.trivial.impl;
 
 import com.google.common.base.Function;
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
 import com.google.common.collect.FluentIterable;
 import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.SettableFuture;
+
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
@@ -43,13 +47,15 @@
 import org.onlab.util.NewConcurrentHashMap;
 import org.slf4j.Logger;
 
-import java.util.Arrays;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.apache.commons.lang3.concurrent.ConcurrentUtils.createIfAbsentUnchecked;
 import static org.onlab.onos.net.flow.FlowRuleEvent.Type.RULE_REMOVED;
@@ -72,6 +78,18 @@
     private final ConcurrentMap<DeviceId, ConcurrentMap<FlowId, List<StoredFlowEntry>>>
             flowEntries = new ConcurrentHashMap<>();
 
+    private final AtomicInteger localBatchIdGen = new AtomicInteger();
+
+    // TODO: make this configurable
+    private int pendingFutureTimeoutMinutes = 5;
+
+    private Cache<Integer, SettableFuture<CompletedBatchOperation>> pendingFutures =
+            CacheBuilder.newBuilder()
+                .expireAfterWrite(pendingFutureTimeoutMinutes, TimeUnit.MINUTES)
+                // TODO Explicitly fail the future if expired?
+                //.removalListener(listener)
+                .build();
+
     @Activate
     public void activate() {
         log.info("Started");
@@ -173,10 +191,6 @@
             }
             // new flow rule added
             existing.add(f);
-            notifyDelegate(FlowRuleBatchEvent.requested(
-                    new FlowRuleBatchRequest(1, /* FIXME generate something */
-                                             Arrays.<FlowEntry>asList(f),
-                                             Collections.<FlowEntry>emptyList())));
         }
     }
 
@@ -190,11 +204,6 @@
                 if (entry.equals(rule)) {
                     synchronized (entry) {
                         entry.setState(FlowEntryState.PENDING_REMOVE);
-                        // TODO: Should we notify only if it's "remote" event?
-                        notifyDelegate(FlowRuleBatchEvent.requested(
-                                new FlowRuleBatchRequest(1, /* FIXME generate something */
-                                                         Collections.<FlowEntry>emptyList(),
-                                                         Arrays.<FlowEntry>asList(entry))));
                     }
                 }
             }
@@ -251,20 +260,47 @@
     @Override
     public Future<CompletedBatchOperation> storeBatch(
             FlowRuleBatchOperation batchOperation) {
+        List<FlowRule> toAdd = new ArrayList<>();
+        List<FlowRule> toRemove = new ArrayList<>();
         for (FlowRuleBatchEntry entry : batchOperation.getOperations()) {
+            final FlowRule flowRule = entry.getTarget();
             if (entry.getOperator().equals(FlowRuleOperation.ADD)) {
-                storeFlowRule(entry.getTarget());
+                if (!getFlowEntries(flowRule.deviceId(), flowRule.id()).contains(flowRule)) {
+                    storeFlowRule(flowRule);
+                    toAdd.add(flowRule);
+                }
             } else if (entry.getOperator().equals(FlowRuleOperation.REMOVE)) {
-                deleteFlowRule(entry.getTarget());
+                if (getFlowEntries(flowRule.deviceId(), flowRule.id()).contains(flowRule)) {
+                    deleteFlowRule(flowRule);
+                    toRemove.add(flowRule);
+                }
             } else {
                 throw new UnsupportedOperationException("Unsupported operation type");
             }
         }
-        return Futures.immediateFuture(new CompletedBatchOperation(true, Collections.<FlowEntry>emptySet()));
+
+        if (toAdd.isEmpty() && toRemove.isEmpty()) {
+            return Futures.immediateFuture(new CompletedBatchOperation(true, Collections.<FlowRule>emptySet()));
+        }
+
+        SettableFuture<CompletedBatchOperation> r = SettableFuture.create();
+        final int batchId = localBatchIdGen.incrementAndGet();
+
+        pendingFutures.put(batchId, r);
+        notifyDelegate(FlowRuleBatchEvent.requested(new FlowRuleBatchRequest(batchId, toAdd, toRemove)));
+
+        return r;
     }
 
     @Override
     public void batchOperationComplete(FlowRuleBatchEvent event) {
+        final Integer batchId = event.subject().batchId();
+        SettableFuture<CompletedBatchOperation> future
+            = pendingFutures.getIfPresent(batchId);
+        if (future != null) {
+            future.set(event.result());
+            pendingFutures.invalidate(batchId);
+        }
         notifyDelegate(event);
     }
 }
diff --git a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowEntryBuilder.java b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowEntryBuilder.java
index 02ec827..e5131df 100644
--- a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowEntryBuilder.java
+++ b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/FlowEntryBuilder.java
@@ -289,7 +289,10 @@
             case OCH_SIGID:
                 builder.matchLambda(match.get(MatchField.OCH_SIGID).getChannelNumber());
                 break;
-            case OCH_SIGTYPE_BASIC:
+            case OCH_SIGTYPE:
+                builder.matchOpticalSignalType(match.get(MatchField
+                                                                 .OCH_SIGTYPE).getValue());
+                break;
             case ARP_OP:
             case ARP_SHA:
             case ARP_SPA:
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 b191784..0caf06b 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
@@ -19,6 +19,7 @@
 
 import org.onlab.onos.net.flow.FlowRule;
 import org.onlab.onos.net.flow.TrafficSelector;
+import org.onlab.onos.net.flow.criteria.Criteria;
 import org.onlab.onos.net.flow.criteria.Criteria.EthCriterion;
 import org.onlab.onos.net.flow.criteria.Criteria.EthTypeCriterion;
 import org.onlab.onos.net.flow.criteria.Criteria.IPCriterion;
@@ -46,6 +47,7 @@
 import org.projectfloodlight.openflow.types.OFPort;
 import org.projectfloodlight.openflow.types.OFVlanVidMatch;
 import org.projectfloodlight.openflow.types.TransportPort;
+import org.projectfloodlight.openflow.types.U8;
 import org.projectfloodlight.openflow.types.VlanPcp;
 import org.projectfloodlight.openflow.types.VlanVid;
 import org.slf4j.Logger;
@@ -197,6 +199,12 @@
                 mBuilder.setExact(MatchField.OCH_SIGID,
                         new CircuitSignalID((byte) 1, (byte) 2, lc.lambda(), (short) 1));
                 break;
+            case OCH_SIGTYPE:
+                Criteria.OpticalSignalTypeCriterion sc =
+                        (Criteria.OpticalSignalTypeCriterion) c;
+                mBuilder.setExact(MatchField.OCH_SIGTYPE,
+                                  U8.of(sc.signalType()));
+                break;
             case ARP_OP:
             case ARP_SHA:
             case ARP_SPA:
diff --git a/web/gui/src/main/java/org/onlab/onos/gui/TopologyResource.java b/web/gui/src/main/java/org/onlab/onos/gui/TopologyResource.java
index 14795b2..b63e3e0 100644
--- a/web/gui/src/main/java/org/onlab/onos/gui/TopologyResource.java
+++ b/web/gui/src/main/java/org/onlab/onos/gui/TopologyResource.java
@@ -101,7 +101,7 @@
                             new Prop("Vendor", device.manufacturer()),
                             new Prop("H/W Version", device.hwVersion()),
                             new Prop("S/W Version", device.swVersion()),
-                            new Prop("S/W Version", device.serialNumber()),
+                            new Prop("Serial Number", device.serialNumber()),
                             new Separator(),
                             new Prop("Latitude", annot.value("latitude")),
                             new Prop("Longitude", annot.value("longitude")),