diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
index c34bafa9b2..9dc9e0d7ac 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPClient.cs
@@ -76,6 +76,12 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// or removed, this number must also change</summary>
         const int THROTTLE_CATEGORY_COUNT = 8;
 
+        /// <summary>
+        /// Controls whether information is logged about each outbound packet immediately before it is sent.  For debug purposes.
+        /// </summary>
+        /// <remarks>Any level above 0 will turn on logging.</remarks>
+        public int DebugDataOutLevel { get; set; }
+
         /// <summary>Fired when updated networking stats are produced for this client</summary>
         public event PacketStats OnPacketStats;
         /// <summary>Fired when the queue for a packet category is empty. This event can be
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
index 8f8558d367..a90ea6cebe 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
@@ -686,7 +686,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             MainConsole.Instance.Commands.AddCommand(
                 "Debug", false, "debug lludp packet",
                  "debug lludp packet [--default | --all] <level> [<avatar-first-name> <avatar-last-name>]",
-                 "Turn on packet debugging",
+                 "Turn on packet debugging.  This logs information when the client stack hands a processed packet off to downstream code or when upstream code first requests that a certain packet be sent.",
                    "If level >  255 then all incoming and outgoing packets are logged.\n"
                  + "If level <= 255 then incoming AgentUpdate and outgoing SimStats and SimulatorViewerTimeMessage packets are not logged.\n"
                  + "If level <= 200 then incoming RequestImage and outgoing ImagePacket, ImageData, LayerData and CoarseLocationUpdate packets are not logged.\n"
@@ -699,6 +699,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                  + "If an avatar name is given then only packets from that avatar are logged.",
                  HandlePacketCommand);
 
+            MainConsole.Instance.Commands.AddCommand(
+                "Debug", false, "debug lludp data out",
+                "debug lludp data out <level> <avatar-first-name> <avatar-last-name>\"",
+                "Turn on debugging for final outgoing data to the given user's client.",
+                "This operates at a much lower level than the packet command and prints out available details when the data is actually sent.\n"
+                + "If level >  0 then information about all outgoing UDP data for this avatar is logged.\n"
+                + "If level <= 0 then no information about outgoing UDP data for this avatar is logged.",
+                HandleDataCommand);
+
             MainConsole.Instance.Commands.AddCommand(
                 "Debug", false, "debug lludp drop",
                 "debug lludp drop <in|out> <add|remove> <packet-name>",
@@ -755,6 +764,37 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 HandleAgentUpdateCommand);
         }
 
+        private void HandleDataCommand(string module, string[] args)
+        {
+            if (SceneManager.Instance.CurrentScene != null && SceneManager.Instance.CurrentScene != Scene)
+                return;
+
+            if (args.Length != 7)
+            {
+                MainConsole.Instance.OutputFormat("Usage: debug lludp data out <true|false> <avatar-first-name> <avatar-last-name>");
+                return;
+            }
+
+            int level;
+            if (!ConsoleUtil.TryParseConsoleInt(MainConsole.Instance, args[4], out level))
+                return;
+
+            string firstName = args[5];
+            string lastName = args[6];
+
+            Scene.ForEachScenePresence(sp =>
+            {
+                if (sp.Firstname == firstName && sp.Lastname == lastName)
+                {
+                    MainConsole.Instance.OutputFormat(
+                        "Data debug for {0} ({1}) set to {2} in {3}",
+                        sp.Name, sp.IsChildAgent ? "child" : "root", level, Scene.Name);
+
+                    ((LLClientView)sp.ControllingClient).UDPClient.DebugDataOutLevel = level;
+                }
+            });
+        }
+
         private void HandlePacketCommand(string module, string[] args)
         {
             if (SceneManager.Instance.CurrentScene != null && SceneManager.Instance.CurrentScene != Scene)
@@ -1360,6 +1400,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             // is 100% correct
             PacketsSentCount++;
 
+            if (udpClient.DebugDataOutLevel > 0)
+                m_log.DebugFormat(
+                    "[LLUDPSERVER]: Sending packet #{0} (rel: {1}, res: {2}) to {3} from {4}",
+                    outgoingPacket.SequenceNumber, isReliable, isResend, udpClient.AgentID, Scene.Name);
+
             // Put the UDP payload on the wire
             AsyncBeginSend(buffer);