diff --git a/core/api/src/main/java/org/onosproject/net/AbstractDescription.java b/core/api/src/main/java/org/onosproject/net/AbstractDescription.java
index d81b83c..34042da 100644
--- a/core/api/src/main/java/org/onosproject/net/AbstractDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/AbstractDescription.java
@@ -16,6 +16,7 @@
 package org.onosproject.net;
 
 import static com.google.common.base.Preconditions.checkArgument;
+import com.google.common.base.Objects;
 
 /**
  * Base implementation of an annotated model description.
@@ -46,4 +47,18 @@
         return annotations;
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(annotations);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object instanceof AbstractDescription) {
+            AbstractDescription that = (AbstractDescription) object;
+            return Objects.equal(this.annotations, that.annotations);
+        }
+        return false;
+    }
+
 }
diff --git a/core/api/src/main/java/org/onosproject/net/device/DefaultDeviceDescription.java b/core/api/src/main/java/org/onosproject/net/device/DefaultDeviceDescription.java
index 0fcc800..9074792 100644
--- a/core/api/src/main/java/org/onosproject/net/device/DefaultDeviceDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/device/DefaultDeviceDescription.java
@@ -24,6 +24,7 @@
 import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.Preconditions.checkNotNull;
 import static org.onosproject.net.Device.Type;
+import com.google.common.base.Objects;
 
 /**
  * Default implementation of immutable device description entity.
@@ -132,6 +133,30 @@
                 .toString();
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(super.hashCode(), uri, type, manufacturer,
+                                hwVersion, swVersion, serialNumber, chassisId);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object instanceof DefaultDeviceDescription) {
+            if (!super.equals(object)) {
+                return false;
+            }
+            DefaultDeviceDescription that = (DefaultDeviceDescription) object;
+            return Objects.equal(this.uri, that.uri)
+                    && Objects.equal(this.type, that.type)
+                    && Objects.equal(this.manufacturer, that.manufacturer)
+                    && Objects.equal(this.hwVersion, that.hwVersion)
+                    && Objects.equal(this.swVersion, that.swVersion)
+                    && Objects.equal(this.serialNumber, that.serialNumber)
+                    && Objects.equal(this.chassisId, that.chassisId);
+        }
+        return false;
+    }
+
     // default constructor for serialization
     private DefaultDeviceDescription() {
         this.uri = null;
diff --git a/core/api/src/main/java/org/onosproject/net/device/DefaultPortDescription.java b/core/api/src/main/java/org/onosproject/net/device/DefaultPortDescription.java
index 572d201..d62e932 100644
--- a/core/api/src/main/java/org/onosproject/net/device/DefaultPortDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/device/DefaultPortDescription.java
@@ -21,6 +21,7 @@
 import org.onosproject.net.SparseAnnotations;
 
 import static org.onosproject.net.Port.Type;
+import com.google.common.base.Objects;
 
 /**
  * Default implementation of immutable port description.
@@ -117,4 +118,25 @@
                 .toString();
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(super.hashCode(), number, isEnabled, type,
+                                portSpeed);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object != null && getClass() == object.getClass()) {
+            if (!super.equals(object)) {
+                return false;
+            }
+            DefaultPortDescription that = (DefaultPortDescription) object;
+            return Objects.equal(this.number, that.number)
+                    && Objects.equal(this.isEnabled, that.isEnabled)
+                    && Objects.equal(this.type, that.type)
+                    && Objects.equal(this.portSpeed, that.portSpeed);
+        }
+        return false;
+    }
+
 }
diff --git a/core/api/src/main/java/org/onosproject/net/host/DefaultHostDescription.java b/core/api/src/main/java/org/onosproject/net/host/DefaultHostDescription.java
index 1f05197..307a607 100644
--- a/core/api/src/main/java/org/onosproject/net/host/DefaultHostDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/host/DefaultHostDescription.java
@@ -28,6 +28,7 @@
 import com.google.common.collect.ImmutableSet;
 
 import static com.google.common.base.MoreObjects.toStringHelper;
+import com.google.common.base.Objects;
 
 /**
  * Default implementation of an immutable host description.
@@ -119,4 +120,24 @@
                 .toString();
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(super.hashCode(), mac, vlan, location, ip);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object != null && getClass() == object.getClass()) {
+            if (!super.equals(object)) {
+                return false;
+            }
+            DefaultHostDescription that = (DefaultHostDescription) object;
+            return Objects.equal(this.mac, that.mac)
+                    && Objects.equal(this.vlan, that.vlan)
+                    && Objects.equal(this.location, that.location)
+                    && Objects.equal(this.ip, that.ip);
+        }
+        return false;
+    }
+
 }
diff --git a/core/api/src/main/java/org/onosproject/net/link/DefaultLinkDescription.java b/core/api/src/main/java/org/onosproject/net/link/DefaultLinkDescription.java
index 891eb65..cba1764 100644
--- a/core/api/src/main/java/org/onosproject/net/link/DefaultLinkDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/link/DefaultLinkDescription.java
@@ -20,6 +20,7 @@
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.Link;
 import org.onosproject.net.SparseAnnotations;
+import com.google.common.base.Objects;
 
 /**
  * Default implementation of immutable link description entity.
@@ -70,4 +71,23 @@
                 .add("type", type()).toString();
     }
 
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(super.hashCode(), src, dst, type);
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object != null && getClass() == object.getClass()) {
+            if (!super.equals(object)) {
+                return false;
+            }
+            DefaultLinkDescription that = (DefaultLinkDescription) object;
+            return Objects.equal(this.src, that.src)
+                    && Objects.equal(this.dst, that.dst)
+                    && Objects.equal(this.type, that.type);
+        }
+        return false;
+    }
+
 }