Fix VLAN range of setChain

diff --git a/src/emuvim/dcemulator/net.py b/src/emuvim/dcemulator/net.py
index 8e0134e..3eee2e5 100755
--- a/src/emuvim/dcemulator/net.py
+++ b/src/emuvim/dcemulator/net.py
@@ -113,7 +113,7 @@
         self.DCNetwork_graph = nx.MultiDiGraph()
 
         # initialize pool of vlan tags to setup the SDN paths
-        self.vlans = range(4096)[::-1]
+        self.vlans = range(1, 4096)[::-1]
 
         # link to Ryu REST_API
         ryu_ip = 'localhost'