diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/device/impl/PortFragmentId.java b/core/store/dist/src/main/java/org/onlab/onos/store/device/impl/PortFragmentId.java
new file mode 100644
index 0000000..0ac3643
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/device/impl/PortFragmentId.java
@@ -0,0 +1,61 @@
+package org.onlab.onos.store.device.impl;
+
+import java.util.Objects;
+
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.provider.ProviderId;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Identifier for PortDescription from a Provider.
+ */
+public final class PortFragmentId {
+    public final ProviderId providerId;
+    public final DeviceId deviceId;
+    public final PortNumber portNumber;
+
+    public PortFragmentId(DeviceId deviceId, ProviderId providerId,
+                          PortNumber portNumber) {
+        this.providerId = providerId;
+        this.deviceId = deviceId;
+        this.portNumber = portNumber;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(providerId, deviceId, portNumber);
+    };
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof PortFragmentId)) {
+            return false;
+        }
+        PortFragmentId that = (PortFragmentId) obj;
+        return Objects.equals(this.deviceId, that.deviceId) &&
+               Objects.equals(this.portNumber, that.portNumber) &&
+               Objects.equals(this.providerId, that.providerId);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .add("portNumber", portNumber)
+                .toString();
+    }
+
+    // for serializer
+    @SuppressWarnings("unused")
+    private PortFragmentId() {
+        this.providerId = null;
+        this.deviceId = null;
+        this.portNumber = null;
+    }
+}