diff --git a/src/main/java/net/onrc/onos/apps/proxyarp/ArpReplyNotification.java b/src/main/java/net/onrc/onos/apps/proxyarp/ArpReplyNotification.java
new file mode 100644
index 0000000..bde2734
--- /dev/null
+++ b/src/main/java/net/onrc/onos/apps/proxyarp/ArpReplyNotification.java
@@ -0,0 +1,46 @@
+package net.onrc.onos.apps.proxyarp;
+
+import java.io.Serializable;
+
+import net.floodlightcontroller.util.MACAddress;
+
+/**
+ * Inter-instance notification that an ARP reply has been received. The
+ * notification contains both the IP address and the MAC address.
+ */
+public class ArpReplyNotification implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    private int targetAddress;
+    private MACAddress targetMacAddress;
+
+    protected ArpReplyNotification() {}
+    /**
+     * Class constructor.
+     * @param targetAddress IP address received from the ARP reply
+     * @param targetMacAddress MAC address received from the ARP reply
+     */
+    public ArpReplyNotification(int targetAddress,
+            MACAddress targetMacAddress) {
+        this.targetAddress = targetAddress;
+        this.targetMacAddress = targetMacAddress;
+    }
+
+    /**
+     * Returns the IP address of the ARP reply.
+     * @return the IP address
+     */
+    public int getTargetAddress() {
+        return targetAddress;
+    }
+
+    /**
+     * Returns the MAC address of the ARP reply.
+     * @return the MAC address
+     */
+    public MACAddress getTargetMacAddress() {
+        return targetMacAddress;
+    }
+
+}