--- netmap.js.orig	2015-03-19 15:28:54.943930818 +0100
+++ netmap.js	2015-03-19 15:23:47.541931003 +0100
@@ -18,6 +18,8 @@
 
         // Disable caching for netmap
         $.ajaxSetup({ cache: false });
+        // raise timeout from 20 to 240 sec
+        $.ajaxSetup({ timeout: 240000 });
 
         document.navNetmapAppSpinner.stop();
 
--- graph.js.orig	2015-03-19 14:35:23.976932746 +0100
+++ graph.js	2015-03-19 15:27:23.099930874 +0100
@@ -85,6 +85,7 @@
          */
         loadTraffic: function () {
             var self = this;
+            console.log('Start fetching traffic data');
             $.getJSON('traffic/layer' + this.get('layer') + '/')
                 .done(function (data) {
                     self.trafficSuccess.call(self, data);
@@ -96,6 +97,7 @@
 
             var links = this.get('linkCollection');
 
+            console.log('Traffic data received, processing.');
             // Extend the link-objects with traffic data
             links.each(function (link) {
                 var source = parseInt(link.get('source').id);
@@ -114,9 +116,10 @@
             });
 
             Backbone.EventBroker.trigger('netmap:updateGraph');
+            console.log('Traffic data refreshed');
         },
 
-        trafficError: function () { console.log('Failed to fetch traffic');
+        trafficError: function (jqXHR,textStatus,errorThrown) { console.log('Failed to fetch traffic: '+textStatus+' / '+errorThrown);
 
             // TODO: Meaningful report
         }