diff --git a/heat/engine/resources/openstack/manila/share_network.py b/heat/engine/resources/openstack/manila/share_network.py
index 2b5d98b866..5d0e4bb72f 100644
--- a/heat/engine/resources/openstack/manila/share_network.py
+++ b/heat/engine/resources/openstack/manila/share_network.py
@@ -128,6 +128,21 @@ class ManilaShareNetwork(resource.Resource):
             raise exception.ResourcePropertyConflict(self.NEUTRON_SUBNET,
                                                      self.NOVA_NETWORK)
 
+        if (self.properties[self.NEUTRON_NETWORK] and
+                self.properties[self.NEUTRON_SUBNET]):
+            plg = self.client_plugin('neutron')
+            subnet_id = plg.find_resourceid_by_name_or_id(
+                'subnet', self.properties[self.NEUTRON_SUBNET])
+            net_id = plg.network_id_from_subnet_id(subnet_id)
+            provided_net_id = plg.find_resourceid_by_name_or_id(
+                'network', self.properties[self.NEUTRON_NETWORK])
+            if net_id != provided_net_id:
+                msg = (_('Provided %(subnet)s does not belong '
+                         'to provided %(network)s.')
+                       % {'subnet': self.NEUTRON_SUBNET,
+                          'network': self.NEUTRON_NETWORK})
+                raise exception.StackValidationFailed(message=msg)
+
     def translation_rules(self, props):
         if self.is_using_neutron():
             translation_rules = [
@@ -162,10 +177,15 @@ class ManilaShareNetwork(resource.Resource):
         return translation_rules
 
     def handle_create(self):
+        neutron_subnet_id = self.properties[self.NEUTRON_SUBNET]
+        neutron_net_id = self.properties[self.NEUTRON_NETWORK]
+        if neutron_subnet_id and not neutron_net_id:
+            neutron_net_id = self.client_plugin(
+                'neutron').network_id_from_subnet_id(neutron_subnet_id)
         network = self.client().share_networks.create(
             name=self.properties[self.NAME],
-            neutron_net_id=self.properties[self.NEUTRON_NETWORK],
-            neutron_subnet_id=self.properties[self.NEUTRON_SUBNET],
+            neutron_net_id=neutron_net_id,
+            neutron_subnet_id=neutron_subnet_id,
             nova_net_id=self.properties[self.NOVA_NETWORK],
             description=self.properties[self.DESCRIPTION])
         self.resource_id_set(network.id)
@@ -191,11 +211,17 @@ class ManilaShareNetwork(resource.Resource):
                     self.resource_id, service)
 
         if prop_diff:
+            neutron_subnet_id = prop_diff.get(self.NEUTRON_SUBNET)
+            neutron_net_id = prop_diff.get(self.NEUTRON_NETWORK)
+            if neutron_subnet_id and not neutron_net_id:
+                neutron_net_id = self.client_plugin(
+                    'neutron').network_id_from_subnet_id(neutron_subnet_id)
+
             self.client().share_networks.update(
                 self.resource_id,
                 name=prop_diff.get(self.NAME),
-                neutron_net_id=prop_diff.get(self.NEUTRON_NETWORK),
-                neutron_subnet_id=prop_diff.get(self.NEUTRON_SUBNET),
+                neutron_net_id=neutron_net_id,
+                neutron_subnet_id=neutron_subnet_id,
                 nova_net_id=prop_diff.get(self.NOVA_NETWORK),
                 description=prop_diff.get(self.DESCRIPTION))
 
diff --git a/heat/tests/openstack/manila/test_share_network.py b/heat/tests/openstack/manila/test_share_network.py
index 50a53d3203..3190a65fe6 100644
--- a/heat/tests/openstack/manila/test_share_network.py
+++ b/heat/tests/openstack/manila/test_share_network.py
@@ -83,6 +83,13 @@ class ManilaShareNetworkTest(common.HeatTestCase):
 
         self.patchobject(share_network.ManilaShareNetwork, 'client_plugin',
                          return_value=self.client_plugin)
+
+        def return_network(name):
+            return '3'
+
+        self.client_plugin.network_id_from_subnet_id.side_effect = (
+            return_network
+        )
         self.stub_NetworkConstraint_validate()
         self.stub_NovaNetworkConstraint()
         self.stub_SubnetConstraint_validate()
@@ -139,6 +146,22 @@ class ManilaShareNetworkTest(common.HeatTestCase):
             calls, any_order=True)
         self.assertEqual('share_networks', net.entity)
 
+    def test_create_without_network(self):
+        t = template_format.parse(stack_template)
+        del t['resources']['share_network']['properties']['neutron_network']
+        stack = utils.parse_stack(t)
+        rsrc_defn = stack.t.resource_definitions(stack)['share_network']
+        net = self._create_network('share_network', rsrc_defn, stack)
+        self.assertEqual((net.CREATE, net.COMPLETE), net.state)
+        self.assertEqual('42', net.resource_id)
+        net.client().share_networks.create.assert_called_with(
+            name='1', description='2', neutron_net_id='3',
+            neutron_subnet_id='4', nova_net_id=None)
+        calls = [mock.call('42', '6'), mock.call('42', '7')]
+        net.client().share_networks.add_security_service.assert_has_calls(
+            calls, any_order=True)
+        self.assertEqual('share_networks', net.entity)
+
     def test_create_fail(self):
         self.client.share_networks.add_security_service.side_effect = (
             Exception())
@@ -146,6 +169,18 @@ class ManilaShareNetworkTest(common.HeatTestCase):
             exception.ResourceFailure,
             self._create_network, 'share_network', self.rsrc_defn, self.stack)
 
+    def test_validate_conflicting_net_subnet(self):
+        t = template_format.parse(stack_template)
+        t['resources']['share_network']['properties']['neutron_network'] = '5'
+        stack = utils.parse_stack(t)
+        rsrc_defn = stack.t.resource_definitions(stack)['share_network']
+        net = self._create_network('share_network', rsrc_defn, stack)
+        net.is_using_neutron = mock.Mock(return_value=True)
+        msg = ('Provided neutron_subnet does not belong '
+               'to provided neutron_network.')
+        self.assertRaisesRegexp(exception.StackValidationFailed, msg,
+                                net.validate)
+
     def test_update(self):
         net = self._create_network('share_network', self.rsrc_defn, self.stack)
         props = self.tmpl['resources']['share_network']['properties'].copy()