diff --git a/planetstack/openstack/observer.py b/planetstack/openstack/observer.py
index 6516c31..0a683f8 100644
--- a/planetstack/openstack/observer.py
+++ b/planetstack/openstack/observer.py
@@ -317,7 +317,7 @@
             sliver_dict[sliver.instance_id] = sliver
 
         # delete sliver that don't have a sliver record
-        ctx = self.manager.driver.shell.nova_db.ctx 
+        ctx = self.manager.driver.shell.nova_db.ctx
         instances = self.manager.driver.shell.nova_db.instance_get_all(ctx)
         for instance in instances:
             if instance.uuid not in sliver_dict:
@@ -357,6 +357,73 @@
             except:
                 logger.log_exc("failed to add external route for subnet %s" % subnet)
 
+    def sync_network_slivers(self):
+        networkSlivers = NetworkSliver.objects.all()
+        networkSlivers_by_id = {}
+        networkSlivers_by_port = {}
+        for networkSliver in networkSlivers:
+            networkSlivers_by_id[networkSliver.id] = networkSliver
+            networkSlivers_by_port[networkSliver.port_id] = networkSliver
+
+        networks = Network.objects.all()
+        networks_by_id = {}
+        for network in networks:
+            networks_by_id[network.network_id] = network
+
+        slivers = Sliver.objects.all()
+        slivers_by_instance_id = {}
+        for sliver in slivers:
+            slivers_by_instance_id[sliver.instance_id] = sliver
+
+        ports = self.manager.driver.shell.quantum.list_ports()["ports"]
+        for port in ports:
+#            print port
+            if port["id"] in networkSlivers_by_port:
+                # we already have it
+                print "already accounted for port", port["id"]
+                continue
+
+            if port["device_owner"] != "compute:nova":
+                # we only want the ports that connect to instances
+                continue
+
+            network = networks_by_id.get(port['network_id'], None)
+            if not network:
+                #print "no network for port", port["id"], "network", port["network_id"]
+                continue
+
+            sliver = slivers_by_instance_id.get(port['device_id'], None)
+            if not sliver:
+                print "no sliver for port", port["id"], "device_id", port['device_id']
+                continue
+
+            if network.template.sharedNetworkId is not None:
+                # If it's a shared network template, then more than one network
+                # object maps to the quantum network. We have to do a whole bunch
+                # of extra work to find the right one.
+                networks = network.template.network_set.all()
+                network = None
+                for candidate_network in networks:
+                    if (candidate_network.owner == sliver.slice):
+                        print "found network", candidate_network
+                        network = candidate_network
+
+                if not network:
+                    print "failed to find the correct network for a shared template for port", port["id"], "network", port["network_id"]
+                    continue
+
+            if not port["fixed_ips"]:
+                print "port", port["id"], "has no fixed_ips"
+                continue
+
+            print "XXX", port
+
+            ns = NetworkSliver(network=network,
+                               sliver=sliver,
+                               ip=port["fixed_ips"][0]["ip_address"],
+                               port_id=port["id"])
+            ns.save()
+
     def sync_networks(self):
         """
         save all networks where enacted < updated or enacted == None. Remove networks that