--- a/src/network/model/address.cc	Mon Jan 14 09:39:06 2013 -0800
+++ a/src/network/model/address.cc	Tue Jan 15 23:10:16 2013 +0100
@@ -123,7 +123,7 @@ 
 {
   NS_LOG_FUNCTION (this << static_cast<uint32_t> (type) << static_cast<uint32_t> (len));
   NS_ASSERT (len <= MAX_SIZE);
-  return m_len == len && (m_type == type || m_type == 0);
+  return m_len >= len && (m_type == type || m_type == 0);
 }
 bool 
 Address::IsMatchingType (uint8_t type) const