do not create dedicated-public network if a shared-public network already exists
diff --git a/planetstack/model_policies/model_policy_Slice.py b/planetstack/model_policies/model_policy_Slice.py
index 493975f..cf73aa0 100644
--- a/planetstack/model_policies/model_policy_Slice.py
+++ b/planetstack/model_policies/model_policy_Slice.py
@@ -23,22 +23,26 @@
 			sd.save()
 
 	# make sure slice has at least 1 public and 1 private networkd
-	public_net = None
+	public_nets = []
 	private_net = None
 	networks = Network.objects.filter(owner=slice)
 	for network in networks:
 		if network.template.name == 'Public dedicated IPv4':
-			public_net = network
+			public_nets.append(network)
+		elif network.template.name == 'Public shared IPv4':
+			public_nets.append(network)
 		elif network.template.name == 'Private':
-			private_net = network 
-	if not public_net:
-		public_net = Network(
-          	name = slice.name+'-public',
-          	template = NetworkTemplate.objects.get(name='Public dedicated IPv4'),
-          	owner = slice
-      		)
-		public_net.save()
-        
+			private_net = network
+	if not public_nets:
+                # ensure there is at least one public network, and default it to dedicated
+		dedicated_public_net = Network(
+          	    name = slice.name+'-public',
+             	    template = NetworkTemplate.objects.get(name='Public dedicated IPv4'),
+          	    owner = slice
+      		    )
+		dedicated_public_net.save()
+                public_nets.append(dedicated_public_net)
+
 	if not private_net:
         	private_net = Network(
           	name = slice.name+'-private',
@@ -49,19 +53,19 @@
 	# create slice networks
 	public_net_slice = None
 	private_net_slice = None
-	net_slices = NetworkSlice.objects.filter(slice=slice, network__in=[public_net,private_net])
+	net_slices = NetworkSlice.objects.filter(slice=slice, network__in=[private_net]+public_nets)
 	for net_slice in net_slices:
-		if net_slice.network == public_net:
-			public_net_slice = net_slice 
+		if net_slice.network in public_nets:
+			public_net_slice = net_slice
 		elif net_slice.network == private_net:
-			private_net_slice = net_slice 
+			private_net_slice = net_slice
 	if not public_net_slice:
-		public_net_slice = NetworkSlice(slice=slice, network=public_net)
+		public_net_slice = NetworkSlice(slice=slice, network=public_nets[0])
 		public_net_slice.save()
 	if not private_net_slice:
 		private_net_slice = NetworkSlice(slice=slice, network=private_net)
-		private_net_slice.save() 		
-                      
-             
-        
-	 
+		private_net_slice.save()
+
+
+
+