bring up lo when running without docker

start_testbed.py

@@ -164,6 +164,18 @@ def start_node(base_name,i):
             'add',
             name
            ])
+        subprocess.call([
+            'sudo',
+            'ip',
+            'netns',
+            'exec',
+            name,
+            'ip',
+            'link',
+            'set',
+            'lo',
+            'up'
+           ])
         pass
 
     # Add the node's info to our list.