Index: trunk/packages/invirt-web/code/controls.py
===================================================================
--- trunk/packages/invirt-web/code/controls.py	(revision 2190)
+++ trunk/packages/invirt-web/code/controls.py	(revision 2211)
@@ -97,5 +97,5 @@
         disk = Disk(machine=machine,
                     guest_device_name='hda', size=disksize)
-        nic = NIC.query().filter_by(machine_id=None).first()
+        nic = NIC.query().filter_by(machine_id=None).filter_by(reusable=True).first()
         if not nic: #No IPs left!
             raise CodeError("No IP addresses left!  "