Enable ARP handling across multiple instances disabling local ARP handling and turning on the Hazelcast ARP reply notification handler in ProxyArpManager
diff --git a/src/main/java/net/onrc/onos/ofcontroller/proxyarp/ProxyArpManager.java b/src/main/java/net/onrc/onos/ofcontroller/proxyarp/ProxyArpManager.java
index ac99678..5d8ddf2 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/proxyarp/ProxyArpManager.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/proxyarp/ProxyArpManager.java
@@ -187,6 +187,7 @@
 		floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this);
 		
 		datagrid.registerPacketOutEventHandler(this);
+		datagrid.registerArpReplyEventHandler(this);
 		
 		deviceStorage = new DeviceStorageImpl();
 		deviceStorage.init("");
@@ -295,8 +296,10 @@
 				handleArpRequest(sw, pi, arp, eth);
 			}
 			else if (arp.getOpCode() == ARP.OP_REPLY) {
-				handleArpReply(sw, pi, arp);
+				// For replies we simply send a notification via Hazelcast
 				sendArpReplyNotification(eth, pi);
+				
+				//handleArpReply(sw, pi, arp);
 			}
 			
 			// Stop ARP packets here