diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultFlowRule.java b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultFlowRule.java
index f705a94..bb4805b 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultFlowRule.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultFlowRule.java
@@ -27,11 +27,12 @@
 
     private final ApplicationId appId;
 
-    private boolean expired;
+    private final int timeout;
 
     public DefaultFlowRule(DeviceId deviceId, TrafficSelector selector,
             TrafficTreatment treatment, int priority, FlowRuleState state,
-            long life, long packets, long bytes, long flowId, boolean expired) {
+            long life, long packets, long bytes, long flowId, boolean expired,
+            int timeout) {
         this.deviceId = deviceId;
         this.priority = priority;
         this.selector = selector;
@@ -39,26 +40,30 @@
         this.state = state;
         this.appId = ApplicationId.valueOf((int) (flowId >> 32));
         this.id = FlowId.valueOf(flowId);
-        this.expired = expired;
         this.life = life;
         this.packets = packets;
         this.bytes = bytes;
         this.created = System.currentTimeMillis();
+        this.timeout = timeout;
     }
 
     public DefaultFlowRule(DeviceId deviceId, TrafficSelector selector,
-            TrafficTreatment treatement, int priority, ApplicationId appId) {
-        this(deviceId, selector, treatement, priority, FlowRuleState.CREATED, appId);
+            TrafficTreatment treatement, int priority, ApplicationId appId,
+            int timeout) {
+        this(deviceId, selector, treatement, priority,
+                FlowRuleState.CREATED, appId, timeout);
     }
 
     public DefaultFlowRule(FlowRule rule, FlowRuleState state) {
         this(rule.deviceId(), rule.selector(), rule.treatment(),
-                rule.priority(), state, rule.id(), rule.appId());
+                rule.priority(), state, rule.id(), rule.appId(),
+                rule.timeout());
     }
 
     private DefaultFlowRule(DeviceId deviceId,
             TrafficSelector selector, TrafficTreatment treatment,
-            int priority, FlowRuleState state, ApplicationId appId) {
+            int priority, FlowRuleState state, ApplicationId appId,
+            int timeout) {
         this.deviceId = deviceId;
         this.priority = priority;
         this.selector = selector;
@@ -69,13 +74,16 @@
         this.bytes = 0;
         this.appId = appId;
 
+        this.timeout = timeout;
+
         this.id = FlowId.valueOf((((long) appId().id()) << 32) | (this.hash() & 0xffffffffL));
         this.created = System.currentTimeMillis();
     }
 
     private DefaultFlowRule(DeviceId deviceId,
             TrafficSelector selector, TrafficTreatment treatment,
-            int priority, FlowRuleState state, FlowId flowId, ApplicationId appId) {
+            int priority, FlowRuleState state, FlowId flowId, ApplicationId appId,
+            int timeout) {
         this.deviceId = deviceId;
         this.priority = priority;
         this.selector = selector;
@@ -86,6 +94,7 @@
         this.bytes = 0;
         this.appId = appId;
         this.id = flowId;
+        this.timeout = timeout;
         this.created = System.currentTimeMillis();
     }
 
@@ -149,7 +158,7 @@
      * @see java.lang.Object#equals(java.lang.Object)
      */
     public int hashCode() {
-        return Objects.hash(deviceId, id);
+        return Objects.hash(deviceId, selector, priority);
     }
 
     public int hash() {
@@ -170,7 +179,10 @@
         if (obj instanceof DefaultFlowRule) {
             DefaultFlowRule that = (DefaultFlowRule) obj;
             return Objects.equals(deviceId, that.deviceId) &&
-                    Objects.equals(id, that.id);
+                    //Objects.equals(id, that.id) &&
+                    Objects.equals(priority, that.priority) &&
+                    Objects.equals(selector, that.selector);
+
         }
         return false;
     }
@@ -181,16 +193,16 @@
                 .add("id", id)
                 .add("deviceId", deviceId)
                 .add("priority", priority)
-                .add("selector", selector)
-                .add("treatment", treatment)
+                .add("selector", selector.criteria())
+                .add("treatment", treatment == null ? "N/A" : treatment.instructions())
                 .add("created", created)
                 .add("state", state)
                 .toString();
     }
 
     @Override
-    public boolean expired() {
-        return expired;
+    public int timeout() {
+        return timeout > MAX_TIMEOUT ? MAX_TIMEOUT : this.timeout;
     }
 
 }
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 8f68ea5..d792c7e 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
@@ -3,8 +3,9 @@
 import static org.slf4j.LoggerFactory.getLogger;
 
 import java.util.Collections;
-import java.util.LinkedList;
-import java.util.List;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
 
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.flow.criteria.Criteria;
@@ -16,22 +17,42 @@
 
 public final class DefaultTrafficSelector implements TrafficSelector {
 
-    private final List<Criterion> selector;
+    private final Set<Criterion> selector;
 
-    private DefaultTrafficSelector(List<Criterion> selector) {
-        this.selector = Collections.unmodifiableList(selector);
+    private DefaultTrafficSelector(Set<Criterion> selector) {
+        this.selector = Collections.unmodifiableSet(selector);
     }
 
     @Override
-    public List<Criterion> criteria() {
+    public Set<Criterion> criteria() {
         return selector;
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hash(selector);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof DefaultTrafficSelector) {
+            DefaultTrafficSelector that = (DefaultTrafficSelector) obj;
+            return Objects.equals(selector, that.selector);
+
+        }
+        return false;
+    }
+
+
+
     public static class Builder implements TrafficSelector.Builder {
 
         private final Logger log = getLogger(getClass());
 
-        private final List<Criterion> selector = new LinkedList<>();
+        private final Set<Criterion> selector = new HashSet<>();
 
         @Override
         public Builder add(Criterion criterion) {
@@ -39,38 +60,47 @@
             return this;
         }
 
+        @Override
         public Builder matchInport(PortNumber port) {
             return add(Criteria.matchInPort(port));
         }
 
+        @Override
         public Builder matchEthSrc(MacAddress addr) {
             return add(Criteria.matchEthSrc(addr));
         }
 
+        @Override
         public Builder matchEthDst(MacAddress addr) {
             return add(Criteria.matchEthDst(addr));
         }
 
+        @Override
         public Builder matchEthType(short ethType) {
             return add(Criteria.matchEthType(ethType));
         }
 
+        @Override
         public Builder matchVlanId(VlanId vlanId) {
             return add(Criteria.matchVlanId(vlanId));
         }
 
+        @Override
         public Builder matchVlanPcp(Byte vlanPcp) {
             return add(Criteria.matchVlanPcp(vlanPcp));
         }
 
+        @Override
         public Builder matchIPProtocol(Byte proto) {
             return add(Criteria.matchIPProtocol(proto));
         }
 
+        @Override
         public Builder matchIPSrc(IpPrefix ip) {
             return add(Criteria.matchIPSrc(ip));
         }
 
+        @Override
         public Builder matchIPDst(IpPrefix ip) {
             return add(Criteria.matchIPDst(ip));
         }
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRule.java b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRule.java
index 2728e21..4d1b3cf 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRule.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRule.java
@@ -9,6 +9,7 @@
  */
 public interface FlowRule {
 
+    static final int MAX_TIMEOUT = 60;
 
     public enum FlowRuleState {
         /**
@@ -112,10 +113,9 @@
     long bytes();
 
     /**
-     * Indicates that this flow has expired at the device.
-     *
-     * @return true if it has expired, false otherwise
+     * Returns the timeout for this flow requested by an application.
+     * @return integer value of the timeout
      */
-    boolean expired();
+    int timeout();
 
 }
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProvider.java b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProvider.java
index b2c3d30..c4e2f92 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProvider.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProvider.java
@@ -8,6 +8,8 @@
  */
 public interface FlowRuleProvider extends Provider {
 
+    static final int POLL_INTERVAL = 5;
+
     /**
      * Instructs the provider to apply the specified flow rules to their
      * respective devices.
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProviderService.java b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProviderService.java
index 01e4372..2076103 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProviderService.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/FlowRuleProviderService.java
@@ -17,27 +17,6 @@
     void flowRemoved(FlowRule flowRule);
 
     /**
-     * Signals that a flow rule is missing for some network traffic.
-     *
-     * @param flowRule information about traffic in need of flow rule(s)
-     */
-    void flowMissing(FlowRule flowRule);
-
-    /**
-     * Signals that a flow rule is on the switch but not in the store.
-     *
-     * @param flowRule the extra flow rule
-     */
-    void extraneousFlow(FlowRule flowRule);
-
-    /**
-     * Signals that a flow rule was indeed added.
-     *
-     * @param flowRule the added flow rule
-     */
-    void flowAdded(FlowRule flowRule);
-
-    /**
      * Pushes the collection of flow entries currently applied on the given
      * device.
      *
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 249d1f9..c704c8f 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
@@ -1,6 +1,6 @@
 package org.onlab.onos.net.flow;
 
-import java.util.List;
+import java.util.Set;
 
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.flow.criteria.Criterion;
@@ -18,7 +18,7 @@
      *
      * @return list of criteria
      */
-    List<Criterion> criteria();
+    Set<Criterion> criteria();
 
     /**
      * Builder of traffic selector entities.
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 758c51c..a819bd3 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
@@ -2,6 +2,8 @@
 
 import static com.google.common.base.MoreObjects.toStringHelper;
 
+import java.util.Objects;
+
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.flow.criteria.Criterion.Type;
 import org.onlab.packet.IpPrefix;
@@ -137,6 +139,25 @@
             return toStringHelper(type().toString())
                     .add("port", port).toString();
         }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(port);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof PortCriterion) {
+                PortCriterion that = (PortCriterion) obj;
+                return Objects.equals(port, that.port);
+
+            }
+            return false;
+        }
+
     }
 
 
@@ -164,6 +185,27 @@
                     .add("mac", mac).toString();
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(mac, type);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof EthCriterion) {
+                EthCriterion that = (EthCriterion) obj;
+                return Objects.equals(mac, that.mac) &&
+                        Objects.equals(type, that.type);
+
+
+            }
+            return false;
+        }
+
+
     }
 
     public static final class EthTypeCriterion implements Criterion {
@@ -189,6 +231,25 @@
                     .add("ethType", Long.toHexString(ethType)).toString();
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(ethType);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof EthTypeCriterion) {
+                EthTypeCriterion that = (EthTypeCriterion) obj;
+                return Objects.equals(ethType, that.ethType);
+
+
+            }
+            return false;
+        }
+
     }
 
 
@@ -217,6 +278,26 @@
                     .add("ip", ip).toString();
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(ip, type);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof IPCriterion) {
+                IPCriterion that = (IPCriterion) obj;
+                return Objects.equals(ip, that.ip) &&
+                        Objects.equals(type, that.type);
+
+
+            }
+            return false;
+        }
+
     }
 
 
@@ -243,6 +324,25 @@
                     .add("protocol", Long.toHexString(proto)).toString();
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(proto);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof IPProtocolCriterion) {
+                IPProtocolCriterion that = (IPProtocolCriterion) obj;
+                return Objects.equals(proto, that.proto);
+
+
+            }
+            return false;
+        }
+
     }
 
 
@@ -269,6 +369,25 @@
                     .add("pcp", Long.toHexString(vlanPcp)).toString();
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(vlanPcp);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof VlanPcpCriterion) {
+                VlanPcpCriterion that = (VlanPcpCriterion) obj;
+                return Objects.equals(vlanPcp, that.vlanPcp);
+
+
+            }
+            return false;
+        }
+
     }
 
 
@@ -296,6 +415,25 @@
                     .add("id", vlanId).toString();
         }
 
+        @Override
+        public int hashCode() {
+            return Objects.hash(vlanId);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj instanceof VlanIdCriterion) {
+                VlanIdCriterion that = (VlanIdCriterion) obj;
+                return Objects.equals(vlanId, that.vlanId);
+
+
+            }
+            return false;
+        }
+
     }