diff --git a/quantum/plugins/nicira/nicira_nvp_plugin/QuantumPlugin.py b/quantum/plugins/nicira/nicira_nvp_plugin/QuantumPlugin.py
index 8dec3acdf6..a0214f95cf 100644
--- a/quantum/plugins/nicira/nicira_nvp_plugin/QuantumPlugin.py
+++ b/quantum/plugins/nicira/nicira_nvp_plugin/QuantumPlugin.py
@@ -851,12 +851,13 @@ class NvpPluginV2(db_base_plugin_v2.QuantumDbPluginV2,
             main_ls = [ls for ls in lswitches if ls['uuid'] == network.id]
             tag_dict = dict((x['scope'], x['tag']) for x in main_ls[0]['tags'])
             if 'multi_lswitch' not in tag_dict:
+                tags = main_ls[0]['tags']
+                tags.append({'tag': 'True', 'scope': 'multi_lswitch'})
                 nvplib.update_lswitch(cluster,
                                       main_ls[0]['uuid'],
                                       main_ls[0]['display_name'],
                                       network['tenant_id'],
-                                      tags=[{'tag': 'True',
-                                             'scope': 'multi_lswitch'}])
+                                      tags=tags)
             selected_lswitch = nvplib.create_lswitch(
                 cluster, network.tenant_id,
                 "%s-ext-%s" % (network.name, len(lswitches)),
@@ -914,7 +915,8 @@ class NvpPluginV2(db_base_plugin_v2.QuantumDbPluginV2,
                 target_cluster, tenant_id, net_data.get('name'),
                 nvp_binding_type,
                 net_data.get(pnet.PHYSICAL_NETWORK),
-                net_data.get(pnet.SEGMENTATION_ID))
+                net_data.get(pnet.SEGMENTATION_ID),
+                shared=net_data.get(attr.SHARED))
             net_data['id'] = lswitch['uuid']
 
         with context.session.begin(subtransactions=True):
@@ -1083,17 +1085,28 @@ class NvpPluginV2(db_base_plugin_v2.QuantumDbPluginV2,
         else:
             tenant_ids = tenant_ids or [context.tenant_id]
             tenant_filter = ''.join(filter_fmt % tid for tid in tenant_ids)
-
         lswitch_filters = "uuid,display_name,fabric_status,tags"
-        lswitch_url_path = (
+        lswitch_url_path_1 = (
             "/ws.v1/lswitch?fields=%s&relations=LogicalSwitchStatus%s"
             % (lswitch_filters, tenant_filter))
+        lswitch_url_path_2 = nvplib._build_uri_path(
+            nvplib.LSWITCH_RESOURCE,
+            fields=lswitch_filters,
+            relations='LogicalSwitchStatus',
+            filters={'tag': 'true', 'tag_scope': 'shared'})
         try:
             for c in self.clusters.itervalues():
                 res = nvplib.get_all_query_pages(
-                    lswitch_url_path, c)
+                    lswitch_url_path_1, c)
                 nvp_lswitches.update(dict(
                     (ls['uuid'], ls) for ls in res))
+                # Issue a second query for fetching shared networks.
+                # We cannot unfortunately use just a single query because tags
+                # cannot be or-ed
+                res_shared = nvplib.get_all_query_pages(
+                    lswitch_url_path_2, c)
+                nvp_lswitches.update(dict(
+                    (ls['uuid'], ls) for ls in res_shared))
         except Exception:
             err_msg = _("Unable to get logical switches")
             LOG.exception(err_msg)
diff --git a/quantum/plugins/nicira/nicira_nvp_plugin/nvplib.py b/quantum/plugins/nicira/nicira_nvp_plugin/nvplib.py
index 5a8dc06b74..2b81ff1495 100644
--- a/quantum/plugins/nicira/nicira_nvp_plugin/nvplib.py
+++ b/quantum/plugins/nicira/nicira_nvp_plugin/nvplib.py
@@ -277,6 +277,7 @@ def create_lswitch(cluster, tenant_id, display_name,
                    transport_zone_uuid=None,
                    vlan_id=None,
                    quantum_net_id=None,
+                   shared=None,
                    **kwargs):
     nvp_binding_type = transport_type
     if transport_type in ('flat', 'vlan'):
@@ -294,6 +295,9 @@ def create_lswitch(cluster, tenant_id, display_name,
     if quantum_net_id:
         lswitch_obj["tags"].append({"tag": quantum_net_id,
                                     "scope": "quantum_net_id"})
+    if shared:
+        lswitch_obj["tags"].append({"tag": "true",
+                                    "scope": "shared"})
     if "tags" in kwargs:
         lswitch_obj["tags"].extend(kwargs["tags"])
     uri = _build_uri_path(LSWITCH_RESOURCE)
diff --git a/quantum/tests/unit/nicira/test_nicira_plugin.py b/quantum/tests/unit/nicira/test_nicira_plugin.py
index 34d5749f86..d86e6084ae 100644
--- a/quantum/tests/unit/nicira/test_nicira_plugin.py
+++ b/quantum/tests/unit/nicira/test_nicira_plugin.py
@@ -198,6 +198,36 @@ class TestNiciraNetworksV2(test_plugin.TestNetworksV2,
             self._test_list_resources('network', [net1, net2],
                                       query_params=query_params)
 
+    def test_delete_network_after_removing_subet(self):
+        gateway_ip = '10.0.0.1'
+        cidr = '10.0.0.0/24'
+        fmt = 'json'
+        # Create new network
+        res = self._create_network(fmt=fmt, name='net',
+                                   admin_state_up=True)
+        network = self.deserialize(fmt, res)
+        subnet = self._make_subnet(fmt, network, gateway_ip,
+                                   cidr, ip_version=4)
+        req = self.new_delete_request('subnets', subnet['subnet']['id'])
+        sub_del_res = req.get_response(self.api)
+        self.assertEqual(sub_del_res.status_int, 204)
+        req = self.new_delete_request('networks', network['network']['id'])
+        net_del_res = req.get_response(self.api)
+        self.assertEqual(net_del_res.status_int, 204)
+
+    def test_list_networks_with_shared(self):
+        with self.network(name='net1') as net1:
+            with self.network(name='net2', shared=True) as net2:
+                req = self.new_list_request('networks')
+                res = self.deserialize('json', req.get_response(self.api))
+                self.assertEqual(len(res['networks']), 2)
+                req_2 = self.new_list_request('networks')
+                req_2.environ['quantum.context'] = context.Context('',
+                                                                   'somebody')
+                res = self.deserialize('json', req_2.get_response(self.api))
+                # tenant must see a single network
+                self.assertEqual(len(res['networks']), 1)
+
 
 class NiciraPortSecurityTestCase(psec.PortSecurityDBTestCase):