diff --git a/emuvim/example_topology.py b/emuvim/example_topology.py
index 91285f8..3c49f99 100644
--- a/emuvim/example_topology.py
+++ b/emuvim/example_topology.py
@@ -35,10 +35,10 @@
        (each data center is one "bigswitch" in our simplified
         first prototype)
     """
-    dc1 = net.addDatacenter("dc1")
-    dc2 = net.addDatacenter("dc2")
-    dc3 = net.addDatacenter("dc3")
-    dc4 = net.addDatacenter("dc4")
+    dc1 = net.addDatacenter("datacenter1")
+    dc2 = net.addDatacenter("datacenter2")
+    dc3 = net.addDatacenter("a_very_long_data_center_name3")
+    dc4 = net.addDatacenter("datacenter4")
 
     """
     3. You can add additional SDN switches for data center
@@ -52,9 +52,9 @@
        These links can use Mininet's features to limit bw, add delay or jitter.
     """
     net.addLink(dc1, dc2)
-    net.addLink("dc1", s1)
-    net.addLink(s1, "dc3")
-    net.addLink(s1, dc4)
+    net.addLink("datacenter1", s1)
+    net.addLink(s1, dc3)
+    net.addLink(s1, "datacenter4")
 
     """
     5. We want to access and control our data centers from the outside,