--- /dev/null	2013-03-06 13:58:44.561061889 +0400
+++ new/test/java/net/IPv6PrefixLenTest.java	2013-03-06 14:14:49.814282030 +0400
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary <rdar://problem/4619360> [JavaJDK16] JavaJDK16: Need to set prefixlen for IPv6 address
+ * @summary com.apple.junit.java.net
+ * @run junit IPv6PrefixLenTest
+ */
+
+import java.net.*;
+import java.util.*;
+import junit.framework.*;
+
+public class IPv6PrefixLenTest extends TestCase {
+
+    public static Test suite() {
+        return new TestSuite(IPv6PrefixLenTest.class);
+    }
+
+    public static void main (String[] args) throws RuntimeException {
+        TestResult tr = junit.textui.TestRunner.run(suite());
+        if ((tr.errorCount() != 0) || (tr.failureCount() != 0)) {
+            throw new RuntimeException("### FAILED: unexpected JUnit errors or failures.");
+        }
+    }
+
+    public void testPrefixLen() throws Exception
+    {
+        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
+        while (interfaces.hasMoreElements()) {
+            NetworkInterface i = interfaces.nextElement();
+            List<InterfaceAddress> interfaceAddresses = i.getInterfaceAddresses();
+            for (InterfaceAddress ia : interfaceAddresses) {
+                InetAddress addr = ia.getAddress();
+                if (addr instanceof Inet6Address) {
+                    assertTrue("IPv6 address [ " + addr + " ] had 0 prefixlen. This is probably wrong.", (ia.getNetworkPrefixLength() != 0));
+                    assertNull("IPv6 address has non-null broadcast address", ia.getBroadcast());
+                }
+            }
+        }
+    }
+
+}