remerged with git pending fix to distributed configuration problem

daemon/core/netns/vif.py

@@ -116,7 +116,19 @@ class TunTap(PyCoreNetIf):
         def nodedevexists():
             cmd = (IP_BIN, 'link', 'show', self.name)
             return self.node.cmd(cmd)
-        self.waitfor(nodedevexists)
+        count = 0
+        while True:
+            try:
+                self.waitfor(nodedevexists)
+                break
+            except RuntimeError:
+                # check if this is an EMANE interface; if so, continue
+                # waiting if EMANE is still running
+                if count < 5 and isinstance(self.net, EmaneNode) and \
+                   self.node.session.emane.emanerunning(self.node):
+                    count += 1
+                else:
+                    raise
 
     def install(self):
         ''' Install this TAP into its namespace. This is not done from the