--- old/src/java.base/share/classes/java/net/MulticastSocket.java	2015-11-18 17:26:30.930896495 -0800
+++ new/src/java.base/share/classes/java/net/MulticastSocket.java	2015-11-18 17:26:30.830896494 -0800
@@ -27,6 +27,8 @@
 
 import java.io.IOException;
 import java.util.Enumeration;
+import jdk.net.Sockets;
+import jdk.net.ExtendedSocketOptions;
 
 /**
  * The multicast datagram socket class is useful for sending
@@ -166,7 +168,10 @@
 
         // Enable SO_REUSEADDR before binding
         setReuseAddress(true);
-
+        
+        // Enable SO_REUSEPORT before binding
+        Sockets.setOption(this, ExtendedSocketOptions.SO_REUSEPORT, true);       
+ 
         if (bindaddr != null) {
             try {
                 bind(bindaddr);