set different site name for each router

Change-Id: Ic81d8d9908923dfafce777c091fc9b288ade7400
refs: #2719
diff --git a/ndn/nfd.py b/ndn/nfd.py
index 8e39a39..d779a69 100644
--- a/ndn/nfd.py
+++ b/ndn/nfd.py
@@ -59,7 +59,7 @@
         node.cmd("export HOME=%s" % node.homeFolder)
 
     def start(self):
-        NdnApplication.start(self, "nfd --config %s 2>> %s &" % (self.confFile, self.logFile))
+        NdnApplication.start(self, "nfd --config %s >> %s 2>&1 &" % (self.confFile, self.logFile))
         time.sleep(2)
 
     def setStrategy(self, name, strategy):