diff --git a/neutron/plugins/ml2/drivers/mech_agent.py b/neutron/plugins/ml2/drivers/mech_agent.py
index b33de46ad3e..f5b67bee712 100644
--- a/neutron/plugins/ml2/drivers/mech_agent.py
+++ b/neutron/plugins/ml2/drivers/mech_agent.py
@@ -49,6 +49,7 @@ class AgentMechanismDriverBase(api.MechanismDriver, metaclass=abc.ABCMeta):
         :param agent_type: Constant identifying agent type in agents_db
         :param supported_vnic_types: The binding:vnic_type values we can bind
         """
+        super(AgentMechanismDriverBase, self).__init__()
         self.agent_type = agent_type
         self.supported_vnic_types = supported_vnic_types
 
diff --git a/neutron/plugins/ml2/plugin.py b/neutron/plugins/ml2/plugin.py
index ee21558a76e..ab642c501d1 100644
--- a/neutron/plugins/ml2/plugin.py
+++ b/neutron/plugins/ml2/plugin.py
@@ -227,7 +227,7 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
             sg_rpc.disable_security_group_extension_by_config(aliases)
             vlantransparent._disable_extension_by_config(aliases)
             filter_validation._disable_extension_by_config(aliases)
-            self._aliases = aliases
+            self._aliases = self._filter_extensions_by_mech_driver(aliases)
         return self._aliases
 
     def __new__(cls, *args, **kwargs):
@@ -292,6 +292,17 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
                         driver=extension_driver, service_plugin=service_plugin
                     )
 
+    def _filter_extensions_by_mech_driver(self, aliases):
+        """Return the supported extensions by the loaded mech drivers"""
+        if not self.mechanism_manager.ordered_mech_drivers:
+            return aliases
+
+        supported_extensions = set([])
+        for mech_driver in self.mechanism_manager.ordered_mech_drivers:
+            supported_extensions |= mech_driver.obj.supported_extensions(
+                set(aliases))
+        return list(supported_extensions)
+
     @registry.receives(resources.PORT,
                        [provisioning_blocks.PROVISIONING_COMPLETE])
     def _port_provisioned(self, rtype, event, trigger, payload=None):
diff --git a/neutron/tests/unit/plugins/ml2/drivers/mechanism_logger.py b/neutron/tests/unit/plugins/ml2/drivers/mechanism_logger.py
index e7d3ba41fc0..2f4a2c08f6e 100644
--- a/neutron/tests/unit/plugins/ml2/drivers/mechanism_logger.py
+++ b/neutron/tests/unit/plugins/ml2/drivers/mechanism_logger.py
@@ -25,6 +25,9 @@ class LoggerMechanismDriver(api.MechanismDriver):
 
     Generally used for testing and debugging.
     """
+    def __init__(self, *args, **kwargs):
+        super(LoggerMechanismDriver, self).__init__(*args, **kwargs)
+        self._supported_extensions = set()
 
     def initialize(self):
         pass
@@ -140,3 +143,8 @@ class LoggerMechanismDriver(api.MechanismDriver):
                  "%(segments)s, candidate hosts %(hosts)s ",
                  {'segments': segments, 'hosts': candidate_hosts})
         return set()
+
+    def supported_extensions(self, extensions):
+        if self._supported_extensions:
+            return extensions & self._supported_extensions
+        return extensions
diff --git a/neutron/tests/unit/plugins/ml2/drivers/mechanism_test.py b/neutron/tests/unit/plugins/ml2/drivers/mechanism_test.py
index a17ed2d987a..b4ed8109a41 100644
--- a/neutron/tests/unit/plugins/ml2/drivers/mechanism_test.py
+++ b/neutron/tests/unit/plugins/ml2/drivers/mechanism_test.py
@@ -32,6 +32,7 @@ class TestMechanismDriver(api.MechanismDriver):
     def __init__(self, *args, **kwargs):
         super(TestMechanismDriver, self).__init__(*args, **kwargs)
         self._supported_vnic_types = ('test_mechanism_driver_vnic_type', )
+        self._supported_extensions = set([])
 
     def initialize(self):
         self.bound_ports = set()
@@ -267,6 +268,11 @@ class TestMechanismDriver(api.MechanismDriver):
     def get_standard_device_mappings(self, agent):
         return {}
 
+    def supported_extensions(self, extensions):
+        if self._supported_extensions:
+            return extensions & self._supported_extensions
+        return extensions
+
 
 class TestMechanismDriverWithAgent(mech_agent.AgentMechanismDriverBase,
                                    TestMechanismDriver):
diff --git a/neutron/tests/unit/plugins/ml2/test_plugin.py b/neutron/tests/unit/plugins/ml2/test_plugin.py
index a9e00c12327..62244748565 100644
--- a/neutron/tests/unit/plugins/ml2/test_plugin.py
+++ b/neutron/tests/unit/plugins/ml2/test_plugin.py
@@ -166,6 +166,24 @@ class TestMl2BulkToggleWithoutBulkless(Ml2PluginV2TestCase):
         self.assertFalse(self._skip_native_bulk)
 
 
+class TestMl2FilterExtensions(Ml2PluginV2TestCase):
+
+    _mechanism_drivers = ['logger', 'test']
+
+    def test__filter_extensions_by_mech_driver(self):
+        extension_aliases = ['ext1', 'ext2', 'ext3', 'ext4', 'ext5']
+        supported_aliases = [{'ext0', 'ext1', 'ext2'},
+                             {'ext4', 'ext5', 'ext6'}]
+        for idx, mech_driver in enumerate(
+                self.plugin.mechanism_manager.ordered_mech_drivers):
+            mech_driver.obj._supported_extensions = supported_aliases[idx]
+
+        supported_extensions = sorted(
+            self.plugin._filter_extensions_by_mech_driver(extension_aliases))
+        self.assertEqual(['ext1', 'ext2', 'ext4', 'ext5'],
+                         supported_extensions)
+
+
 class TestMl2BasicGet(test_plugin.TestBasicGet,
                       Ml2PluginV2TestCase):
     pass