diff --git a/neutron/db/db_base_plugin_v2.py b/neutron/db/db_base_plugin_v2.py
index 11cf0b8b2f1..cc8d9122a86 100644
--- a/neutron/db/db_base_plugin_v2.py
+++ b/neutron/db/db_base_plugin_v2.py
@@ -714,7 +714,14 @@ class NeutronDbPluginV2(db_base_plugin_common.DbBasePluginCommon,
         l3plugin.update_router(context, router_id, info)
 
     @db_api.retry_if_session_inactive()
-    def _create_subnet_postcommit(self, context, result, network, ipam_subnet):
+    def _create_subnet_postcommit(self, context, result,
+                                  network=None, ipam_subnet=None):
+        if not network:
+            network = self._get_network(context,
+                                        result['network_id'])
+        if not ipam_subnet:
+            ipam_subnet = self.ipam.get_subnet(context, result['id'])
+
         if hasattr(network, 'external') and network.external:
             self._update_router_gw_ports(context,
                                          network,
diff --git a/neutron/db/ipam_pluggable_backend.py b/neutron/db/ipam_pluggable_backend.py
index 583ebb1ceee..de72c91142a 100644
--- a/neutron/db/ipam_pluggable_backend.py
+++ b/neutron/db/ipam_pluggable_backend.py
@@ -175,6 +175,10 @@ class IpamPluggableBackend(ipam_backend_mixin.IpamBackendMixin):
         ipam_driver = driver.Pool.get_instance(None, context)
         ipam_driver.remove_subnet(subnet_id)
 
+    def get_subnet(self, context, subnet_id):
+        ipam_driver = driver.Pool.get_instance(None, context)
+        return ipam_driver.get_subnet(subnet_id)
+
     def allocate_ips_for_port_and_store(self, context, port, port_id):
         # Make a copy of port dict to prevent changing
         # incoming dict by adding 'id' to it.
diff --git a/neutron/plugins/ml2/plugin.py b/neutron/plugins/ml2/plugin.py
index ce21de058ae..642f1ee323a 100644
--- a/neutron/plugins/ml2/plugin.py
+++ b/neutron/plugins/ml2/plugin.py
@@ -1180,10 +1180,6 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
                                                         result, network)
             self.mechanism_manager.create_subnet_precommit(mech_context)
 
-        # TODO(kevinbenton): move this to '_after_subnet_create'
-        # db base plugin post commit ops
-        self._create_subnet_postcommit(context, result, net_db, ipam_sub)
-
         return result, mech_context
 
     @utils.transaction_guard
@@ -1194,6 +1190,9 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
         return self._after_create_subnet(context, result, mech_context)
 
     def _after_create_subnet(self, context, result, mech_context):
+        # db base plugin post commit ops
+        self._create_subnet_postcommit(context, result)
+
         kwargs = {'context': context, 'subnet': result}
         registry.notify(resources.SUBNET, events.AFTER_CREATE, self, **kwargs)
         try:
diff --git a/neutron/tests/unit/db/test_db_base_plugin_v2.py b/neutron/tests/unit/db/test_db_base_plugin_v2.py
index 108f1c83a39..b9f9dfc34c1 100644
--- a/neutron/tests/unit/db/test_db_base_plugin_v2.py
+++ b/neutron/tests/unit/db/test_db_base_plugin_v2.py
@@ -401,10 +401,16 @@ class NeutronDbPluginV2TestCase(testlib_api.WebTestCase):
         base_data = {'subnet': {'network_id': net_id,
                                 'ip_version': ip_version,
                                 'tenant_id': self._tenant_id}}
+        if 'ipv6_mode' in kwargs:
+            base_data['subnet']['ipv6_ra_mode'] = kwargs['ipv6_mode']
+            base_data['subnet']['ipv6_address_mode'] = kwargs['ipv6_mode']
         # auto-generate cidrs as they should not overlap
+        base_cidr = "10.0.%s.0/24"
+        if ip_version == constants.IP_VERSION_6:
+            base_cidr = "fd%s::/64"
         overrides = dict((k, v)
                          for (k, v) in zip(range(number),
-                                           [{'cidr': "10.0.%s.0/24" % num}
+                                           [{'cidr': base_cidr % num}
                                             for num in range(number)]))
         kwargs.update({'override': overrides})
         return self._create_bulk(fmt, number, 'subnet', base_data, **kwargs)
@@ -3408,6 +3414,18 @@ class TestSubnetsV2(NeutronDbPluginV2TestCase):
                                            'test')
             self._validate_behavior_on_bulk_success(res, 'subnets')
 
+    def test_create_subnets_bulk_native_ipv6(self):
+        if self._skip_native_bulk:
+            self.skipTest("Plugin does not support native bulk subnet create")
+        with self.network() as net:
+            res = self._create_subnet_bulk(self.fmt,
+                                           2,
+                                           net['network']['id'],
+                                           'test',
+                                           ip_version=constants.IP_VERSION_6,
+                                           ipv6_mode=constants.IPV6_SLAAC)
+            self._validate_behavior_on_bulk_success(res, 'subnets')
+
     def test_create_subnets_bulk_emulated(self):
         real_has_attr = hasattr
 
@@ -4525,6 +4543,25 @@ class TestSubnetsV2(NeutronDbPluginV2TestCase):
         self._test_create_subnet_ipv6_auto_addr_with_port_on_network(
             constants.IPV6_SLAAC, insert_port_not_found=True)
 
+    def test_bulk_create_subnet_ipv6_auto_addr_with_port_on_network(self):
+        # Create a network with one IPv4 subnet and one port
+        with self.network() as network,\
+            self.subnet(network=network) as v4_subnet,\
+            self.port(subnet=v4_subnet,
+                device_owner=constants.DEVICE_OWNER_DHCP) as port:
+            # Add 2 IPv6 auto-address subnets in a bulk request
+            self._create_subnet_bulk(
+                self.fmt, 2, network['network']['id'], 'test',
+                ip_version=constants.IP_VERSION_6,
+                ipv6_mode=constants.IPV6_SLAAC)
+            # Confirm that the port has been updated with addresses
+            # from the new auto-address subnets
+            req = self.new_show_request('ports', port['port']['id'],
+                                        self.fmt)
+            sport = self.deserialize(self.fmt, req.get_response(self.api))
+            fixed_ips = sport['port']['fixed_ips']
+            self.assertEqual(3, len(fixed_ips))
+
     def test_update_subnet_no_gateway(self):
         with self.subnet() as subnet:
             data = {'subnet': {'gateway_ip': '10.0.0.1'}}