diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/storekey/PortNextObjectiveStoreKey.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/storekey/PortNextObjectiveStoreKey.java
new file mode 100644
index 0000000..fdf28df
--- /dev/null
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/storekey/PortNextObjectiveStoreKey.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.segmentrouting.storekey;
+
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.flow.TrafficTreatment;
+
+import java.util.Objects;
+
+/**
+ * Key of Device/Port to NextObjective store.
+ *
+ * Since there can be multiple next objectives to the same physical port,
+ * we differentiate between them by including the treatment in the key.
+ */
+public class PortNextObjectiveStoreKey {
+    private final DeviceId deviceId;
+    private final PortNumber portNum;
+    private final TrafficTreatment treatment;
+
+    /**
+     * Constructs the key of port next objective store.
+     *
+     * @param deviceId device ID
+     * @param portNum port number
+     * @param treatment treatment that will be applied to the interface
+     */
+    public PortNextObjectiveStoreKey(DeviceId deviceId, PortNumber portNum,
+                                     TrafficTreatment treatment) {
+        this.deviceId = deviceId;
+        this.portNum = portNum;
+        this.treatment = treatment;
+    }
+
+    /**
+     * Gets device id in this PortNextObjectiveStoreKey.
+     *
+     * @return device id
+     */
+    public DeviceId deviceId() {
+        return deviceId;
+    }
+
+    /**
+     * Gets port information in this PortNextObjectiveStoreKey.
+     *
+     * @return port information
+     */
+    public PortNumber portNumber() {
+        return portNum;
+    }
+
+    /**
+     * Gets treatment information in this PortNextObjectiveStoreKey.
+     *
+     * @return treatment information
+     */
+    public TrafficTreatment treatment() {
+        return treatment;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof PortNextObjectiveStoreKey)) {
+            return false;
+        }
+        PortNextObjectiveStoreKey that =
+                (PortNextObjectiveStoreKey) o;
+        return (Objects.equals(this.deviceId, that.deviceId) &&
+                Objects.equals(this.portNum, that.portNum) &&
+                Objects.equals(this.treatment, that.treatment));
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(deviceId, portNum, treatment);
+    }
+
+    @Override
+    public String toString() {
+        return "Device: " + deviceId + " Port: " + portNum + " Treatment: " + treatment;
+    }
+}