Test error handling for itf creation.

netbox_agent/network.py

@@ -281,7 +281,17 @@ class Network(object):
         if nic['mtu']:
             params['mtu'] = nic['mtu']
 
-        interface = self.nb_net.interfaces.create(**params)
+        # interface = self.nb_net.interfaces.create(**params)
+
+        try:
+            interface = self.nb_net.interfaces.create(**params)
+        except:
+            logging.error(
+                'Unable to (re)create NIC {name} ({mac}) on {device}'.format(
+                    name=nic['name'], mac=nic['mac'], device=self.device.name
+                )
+            )
+
 
         if nic['vlan']:
             nb_vlan = self.get_or_create_vlan(nic['vlan'])