Index: impl/src/main/java/com/sun/enterprise/mgmt/transport/BlockingIOMulticastSender.java
===================================================================
--- impl/src/main/java/com/sun/enterprise/mgmt/transport/BlockingIOMulticastSender.java	(revision 1508)
+++ impl/src/main/java/com/sun/enterprise/mgmt/transport/BlockingIOMulticastSender.java	(working copy)
@@ -105,22 +105,7 @@
                                       Executor executor,
                                       int multicastTimeToLive,
                                       NetworkManager networkManager ) throws IOException {
-        if( host != null ) {
-            this.localSocketAddress = new InetSocketAddress( host, multicastPort );
-        } else {
-            InetAddress firstInetAddress = null;
-            InetAddress multicastInetAddress = InetAddress.getByName( multicastAddress );
-            // select appropriate IP version type
-            if( multicastInetAddress instanceof Inet6Address ) {
-                firstInetAddress = NetworkUtility.getFirstInetAddress( true );
-            } else {
-                firstInetAddress = NetworkUtility.getFirstInetAddress( false );
-            }
-            if( firstInetAddress != null )
-                this.localSocketAddress = new InetSocketAddress( firstInetAddress, multicastPort );
-            else
-                this.localSocketAddress = null;
-        }
+        this.localSocketAddress = host == null ? null : new InetSocketAddress( host, multicastPort );
         this.multicastPort = multicastPort;
         if( multicastAddress == null )
             multicastAddress = DEFAULT_MULTICAST_ADDRESS;
@@ -128,11 +113,10 @@
         this.multicastSocketAddress = new InetSocketAddress( multicastAddress, multicastPort );
         if( networkInterfaceName != null ) {
             NetworkInterface anInterface = NetworkInterface.getByName( networkInterfaceName );
-            if( NetworkUtility.supportsMulticast( anInterface ) )
+            if( NetworkUtility.supportsMulticast( anInterface ) && anInterface.isUp() ) {
                 this.anInterface = anInterface;
+            }
         }
-        if( this.anInterface == null )
-            this.anInterface = NetworkUtility.getFirstNetworkInterface();
         if( multicastPacketSize < DEFAULT_MULTICAST_PACKET_SIZE )
             this.multicastPacketSize = DEFAULT_MULTICAST_PACKET_SIZE;
         else
@@ -161,10 +145,15 @@
             return;
         super.start();
         multicastSocket = new MulticastSocket( multicastPort );
-        if (anInterface != null) {
-            multicastSocket.setNetworkInterface(anInterface);
-        } else if (localSocketAddress != null) {
-            multicastSocket.setInterface(localSocketAddress.getAddress());
+        if (anInterface != null && localSocketAddress != null) {
+            try {
+                multicastSocket.setInterface(localSocketAddress.getAddress());
+            } catch (Exception e) {
+                LOG.log(Level.WARNING, "Unable to configure MulticastSocket to use specified interface with address: " +
+                                       localSocketAddress.getAddress() +
+                                       ". Continuning with default MulticastSocket interface of " +
+                                       multicastSocket.getInterface(), e);
+            }
         }
 
         //enable loopback.
@@ -207,10 +196,7 @@
                    " network interface: " + multicastSocket.getNetworkInterface() +
                    " multicast address:" + multicastAddress +
                    " timeToLive=" + multicastSocket.getTimeToLive());
-        if( anInterface != null )
-            multicastSocket.joinGroup( multicastSocketAddress, anInterface );
-        else
-            multicastSocket.joinGroup( multicastAddress );
+        multicastSocket.joinGroup( multicastAddress );
     }
 
     /**
@@ -224,10 +210,7 @@
         super.stop();
         if( multicastSocket != null ) {
             try {
-                if( anInterface != null )
-                    multicastSocket.leaveGroup( multicastSocketAddress, anInterface );
-                else
-                    multicastSocket.leaveGroup( multicastAddress );
+                multicastSocket.leaveGroup( multicastAddress );
             } catch( IOException e ) {
             }
             multicastSocket.close();