--- arp-cache.cc	2015-07-22 13:34:12.000000000 +0530
+++ sol2.cc	2015-07-25 14:11:56.329647332 +0530
@@ -373,7 +373,7 @@
 ArpCache::Entry::IsAlive (void)
 {
   NS_LOG_FUNCTION (this);
-  return (m_state == ALIVE) ? true : false;
+  return (m_state == ALIVE || m_state == PERMANENT) ? true : false;
 }
 bool
 ArpCache::Entry::IsWaitReply (void)