FIX: Data centers now have a user defined label (to be identified) but use a short internal name 'dc%d' to avoid too long host/switch names causing Mininet to crash.
diff --git a/emuvim/test/test_emulator.py b/emuvim/test/test_emulator.py
index 7da7aaf..861de1b 100644
--- a/emuvim/test/test_emulator.py
+++ b/emuvim/test/test_emulator.py
@@ -55,7 +55,7 @@
                 self.net.addLink(self.s[i], self.s[i + 1])
         # add some data centers
         for i in range(0, ndatacenter):
-            self.dc.append(self.net.addDatacenter('dc%d' % i))
+            self.dc.append(self.net.addDatacenter('datacenter%d' % i))
         # add some hosts
         for i in range(0, nhosts):
             self.h.append(self.net.addHost('h%d' % i))