diff --git a/neutron/agent/common/config.py b/neutron/agent/common/config.py
index 4bf3710eeb6..33e23945bf2 100644
--- a/neutron/agent/common/config.py
+++ b/neutron/agent/common/config.py
@@ -38,6 +38,16 @@ AGENT_STATE_OPTS = [
                         'is half or less than agent_down_time.')),
 ]
 
+INTERFACE_DRIVER_OPTS = [
+    cfg.StrOpt('interface_driver',
+               help=_("The driver used to manage the virtual interface.")),
+]
+
+USE_NAMESPACES_OPTS = [
+    cfg.BoolOpt('use_namespaces', default=True,
+                help=_("Allow overlapping IP.")),
+]
+
 
 def get_log_args(conf, log_file_name):
     cmd_args = []
@@ -76,6 +86,14 @@ def register_agent_state_opts_helper(conf):
     conf.register_opts(AGENT_STATE_OPTS, 'AGENT')
 
 
+def register_interface_driver_opts_helper(conf):
+    conf.register_opts(INTERFACE_DRIVER_OPTS)
+
+
+def register_use_namespaces_opts_helper(conf):
+    conf.register_opts(USE_NAMESPACES_OPTS)
+
+
 def get_root_helper(conf):
     root_helper = conf.AGENT.root_helper
     if root_helper != 'sudo':
diff --git a/neutron/agent/dhcp_agent.py b/neutron/agent/dhcp_agent.py
index 5cdacab5775..ae597cd4273 100644
--- a/neutron/agent/dhcp_agent.py
+++ b/neutron/agent/dhcp_agent.py
@@ -52,8 +52,6 @@ class DhcpAgent(manager.Manager):
         cfg.StrOpt('dhcp_driver',
                    default='neutron.agent.linux.dhcp.Dnsmasq',
                    help=_("The driver used to manage the DHCP server.")),
-        cfg.BoolOpt('use_namespaces', default=True,
-                    help=_("Allow overlapping IP.")),
         cfg.BoolOpt('enable_isolated_metadata', default=False,
                     help=_("Support Metadata requests on isolated networks.")),
         cfg.BoolOpt('enable_metadata_network', default=False,
@@ -589,6 +587,8 @@ class DhcpAgentWithStateReport(DhcpAgent):
 
 def register_options():
     cfg.CONF.register_opts(DhcpAgent.OPTS)
+    config.register_interface_driver_opts_helper(cfg.CONF)
+    config.register_use_namespaces_opts_helper(cfg.CONF)
     config.register_agent_state_opts_helper(cfg.CONF)
     config.register_root_helper(cfg.CONF)
     cfg.CONF.register_opts(dhcp.OPTS)
diff --git a/neutron/agent/l3_agent.py b/neutron/agent/l3_agent.py
index 84e96bdecea..424915cd4a8 100644
--- a/neutron/agent/l3_agent.py
+++ b/neutron/agent/l3_agent.py
@@ -157,9 +157,6 @@ class L3NATAgent(firewall_l3_agent.FWaaSL3AgentRpcCallback, manager.Manager):
         cfg.StrOpt('external_network_bridge', default='br-ex',
                    help=_("Name of bridge used for external network "
                           "traffic.")),
-        cfg.StrOpt('interface_driver',
-                   help=_("The driver used to manage the virtual "
-                          "interface.")),
         cfg.IntOpt('metadata_port',
                    default=9697,
                    help=_("TCP Port used by Neutron metadata namespace "
@@ -168,8 +165,6 @@ class L3NATAgent(firewall_l3_agent.FWaaSL3AgentRpcCallback, manager.Manager):
                    default=0,
                    help=_("Send this many gratuitous ARPs for HA setup, if "
                           "less than or equal to 0, the feature is disabled")),
-        cfg.BoolOpt('use_namespaces', default=True,
-                    help=_("Allow overlapping IP.")),
         cfg.StrOpt('router_id', default='',
                    help=_("If namespaces is disabled, the l3 agent can only"
                           " configure a router that has the matching router "
@@ -906,6 +901,8 @@ def main(manager='neutron.agent.l3_agent.L3NATAgentWithStateReport'):
     eventlet.monkey_patch()
     conf = cfg.CONF
     conf.register_opts(L3NATAgent.OPTS)
+    config.register_interface_driver_opts_helper(conf)
+    config.register_use_namespaces_opts_helper(conf)
     config.register_agent_state_opts_helper(conf)
     config.register_root_helper(conf)
     conf.register_opts(interface.OPTS)
diff --git a/neutron/agent/linux/dhcp.py b/neutron/agent/linux/dhcp.py
index 8850306e7b8..8116a8b7f81 100644
--- a/neutron/agent/linux/dhcp.py
+++ b/neutron/agent/linux/dhcp.py
@@ -59,8 +59,6 @@ OPTS = [
         'dnsmasq_lease_max',
         default=(2 ** 24),
         help=_('Limit number of leases to prevent a denial-of-service.')),
-    cfg.StrOpt('interface_driver',
-               help=_("The driver used to manage the virtual interface.")),
 ]
 
 IPV4 = 4
diff --git a/neutron/agent/netns_cleanup_util.py b/neutron/agent/netns_cleanup_util.py
index 9c17f715f7a..2551299cda8 100644
--- a/neutron/agent/netns_cleanup_util.py
+++ b/neutron/agent/netns_cleanup_util.py
@@ -63,6 +63,7 @@ def setup_conf():
     conf = cfg.CONF
     conf.register_cli_opts(cli_opts)
     conf.register_opts(opts)
+    agent_config.register_interface_driver_opts_helper(conf)
     agent_config.register_root_helper(conf)
     conf.register_opts(dhcp.OPTS)
     return conf
diff --git a/neutron/agent/ovs_cleanup_util.py b/neutron/agent/ovs_cleanup_util.py
index 51bf1d45996..f7a388b3d22 100644
--- a/neutron/agent/ovs_cleanup_util.py
+++ b/neutron/agent/ovs_cleanup_util.py
@@ -48,6 +48,8 @@ def setup_conf():
     conf.register_cli_opts(opts)
     conf.register_opts(l3_agent.L3NATAgent.OPTS)
     conf.register_opts(interface.OPTS)
+    agent_config.register_interface_driver_opts_helper(conf)
+    agent_config.register_use_namespaces_opts_helper(conf)
     agent_config.register_root_helper(conf)
     return conf
 
diff --git a/neutron/debug/debug_agent.py b/neutron/debug/debug_agent.py
index 71847557295..15bbf3d4a22 100644
--- a/neutron/debug/debug_agent.py
+++ b/neutron/debug/debug_agent.py
@@ -39,11 +39,6 @@ class NeutronDebugAgent():
 
     OPTS = [
         # Needed for drivers
-        cfg.BoolOpt('use_namespaces', default=True,
-                    help=_("Use Linux network namespaces")),
-        cfg.StrOpt('interface_driver',
-                   help=_("The driver used to manage the virtual "
-                          "interface.")),
         cfg.StrOpt('external_network_bridge', default='br-ex',
                    help=_("Name of bridge used for external network "
                           "traffic.")),
diff --git a/neutron/debug/shell.py b/neutron/debug/shell.py
index 103c43014f6..42793f72113 100644
--- a/neutron/debug/shell.py
+++ b/neutron/debug/shell.py
@@ -74,6 +74,8 @@ class NeutronDebugShell(NeutronShell):
         client = self.client_manager.neutron
         cfg.CONF.register_opts(interface.OPTS)
         cfg.CONF.register_opts(NeutronDebugAgent.OPTS)
+        config.register_interface_driver_opts_helper(cfg.CONF)
+        config.register_use_namespaces_opts_helper(cfg.CONF)
         config.register_root_helper(cfg.CONF)
         cfg.CONF(['--config-file', self.options.config_file])
         config.setup_logging(cfg.CONF)
diff --git a/neutron/services/firewall/agents/varmour/varmour_router.py b/neutron/services/firewall/agents/varmour/varmour_router.py
index b359ae18024..25cf02ffadf 100755
--- a/neutron/services/firewall/agents/varmour/varmour_router.py
+++ b/neutron/services/firewall/agents/varmour/varmour_router.py
@@ -331,6 +331,8 @@ def main():
     eventlet.monkey_patch()
     conf = cfg.CONF
     conf.register_opts(vArmourL3NATAgent.OPTS)
+    config.register_interface_driver_opts_helper(conf)
+    config.register_use_namespaces_opts_helper(conf)
     config.register_agent_state_opts_helper(conf)
     config.register_root_helper(conf)
     conf.register_opts(interface.OPTS)
diff --git a/neutron/services/loadbalancer/agent/agent.py b/neutron/services/loadbalancer/agent/agent.py
index 64f661c9141..3a7116c2b3a 100644
--- a/neutron/services/loadbalancer/agent/agent.py
+++ b/neutron/services/loadbalancer/agent/agent.py
@@ -53,6 +53,7 @@ def main():
     cfg.CONF.register_opts(manager.OPTS)
     # import interface options just in case the driver uses namespaces
     cfg.CONF.register_opts(interface.OPTS)
+    config.register_interface_driver_opts_helper(cfg.CONF)
     config.register_agent_state_opts_helper(cfg.CONF)
     config.register_root_helper(cfg.CONF)
 
diff --git a/neutron/services/loadbalancer/agent/agent_manager.py b/neutron/services/loadbalancer/agent/agent_manager.py
index 9517fae9b44..91b453071c4 100644
--- a/neutron/services/loadbalancer/agent/agent_manager.py
+++ b/neutron/services/loadbalancer/agent/agent_manager.py
@@ -39,10 +39,6 @@ OPTS = [
                  '.haproxy.namespace_driver.HaproxyNSDriver'],
         help=_('Drivers used to manage loadbalancing devices'),
     ),
-    cfg.StrOpt(
-        'interface_driver',
-        help=_('The driver used to manage the virtual interface')
-    ),
 ]
 
 
diff --git a/neutron/services/metering/drivers/iptables/iptables_driver.py b/neutron/services/metering/drivers/iptables/iptables_driver.py
index cd5e41c0f78..33a4d27b638 100644
--- a/neutron/services/metering/drivers/iptables/iptables_driver.py
+++ b/neutron/services/metering/drivers/iptables/iptables_driver.py
@@ -34,16 +34,10 @@ TOP_CHAIN = WRAP_NAME + "-FORWARD"
 RULE = '-r-'
 LABEL = '-l-'
 
-IptablesDriverOpts = [
-    cfg.StrOpt('interface_driver',
-               help=_("The driver used to manage the virtual "
-                      "interface.")),
-    cfg.BoolOpt('use_namespaces', default=True,
-                help=_("Allow overlapping IP."))
-]
+config.register_interface_driver_opts_helper(cfg.CONF)
+config.register_use_namespaces_opts_helper(cfg.CONF)
 config.register_root_helper(cfg.CONF)
 cfg.CONF.register_opts(interface.OPTS)
-cfg.CONF.register_opts(IptablesDriverOpts)
 
 
 class IptablesManagerTransaction(object):
diff --git a/neutron/tests/unit/midonet/test_midonet_driver.py b/neutron/tests/unit/midonet/test_midonet_driver.py
index cc550cfbe9e..dc33bcef145 100644
--- a/neutron/tests/unit/midonet/test_midonet_driver.py
+++ b/neutron/tests/unit/midonet/test_midonet_driver.py
@@ -38,6 +38,7 @@ class TestDhcpNoOpDriver(base.BaseTestCase):
     def setUp(self):
         super(TestDhcpNoOpDriver, self).setUp()
         self.conf = config.setup_conf()
+        config.register_interface_driver_opts_helper(self.conf)
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(dhcp.OPTS)
         self.conf.enable_isolated_metadata = True
diff --git a/neutron/tests/unit/services/firewall/agents/l3reference/test_firewall_l3_agent.py b/neutron/tests/unit/services/firewall/agents/l3reference/test_firewall_l3_agent.py
index d9c6a640ce8..7933a349736 100644
--- a/neutron/tests/unit/services/firewall/agents/l3reference/test_firewall_l3_agent.py
+++ b/neutron/tests/unit/services/firewall/agents/l3reference/test_firewall_l3_agent.py
@@ -53,6 +53,7 @@ class TestFwaasL3AgentRpcCallback(base.BaseTestCase):
         self.conf = cfg.ConfigOpts()
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(l3_agent.L3NATAgent.OPTS)
+        agent_config.register_use_namespaces_opts_helper(self.conf)
         agent_config.register_root_helper(self.conf)
         self.conf.root_helper = 'sudo'
         self.api = FWaasAgent(self.conf)
diff --git a/neutron/tests/unit/services/firewall/agents/varmour/test_varmour_router.py b/neutron/tests/unit/services/firewall/agents/varmour/test_varmour_router.py
index b56114380d4..3a7ddd8b941 100644
--- a/neutron/tests/unit/services/firewall/agents/varmour/test_varmour_router.py
+++ b/neutron/tests/unit/services/firewall/agents/varmour/test_varmour_router.py
@@ -44,6 +44,8 @@ class TestVarmourRouter(base.BaseTestCase):
         self.conf = cfg.ConfigOpts()
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(varmour_router.vArmourL3NATAgent.OPTS)
+        agent_config.register_interface_driver_opts_helper(self.conf)
+        agent_config.register_use_namespaces_opts_helper(self.conf)
         agent_config.register_root_helper(self.conf)
         self.conf.register_opts(interface.OPTS)
         self.conf.set_override('interface_driver',
diff --git a/neutron/tests/unit/services/firewall/drivers/varmour/test_varmour_fwaas.py b/neutron/tests/unit/services/firewall/drivers/varmour/test_varmour_fwaas.py
index 79dfbfbb95c..7c6bd667370 100644
--- a/neutron/tests/unit/services/firewall/drivers/varmour/test_varmour_fwaas.py
+++ b/neutron/tests/unit/services/firewall/drivers/varmour/test_varmour_fwaas.py
@@ -45,6 +45,8 @@ class TestBasicRouterOperations(base.BaseTestCase):
         self.conf = cfg.ConfigOpts()
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(varmour_router.vArmourL3NATAgent.OPTS)
+        agent_config.register_interface_driver_opts_helper(self.conf)
+        agent_config.register_use_namespaces_opts_helper(self.conf)
         agent_config.register_root_helper(self.conf)
         self.conf.register_opts(interface.OPTS)
         self.conf.set_override('interface_driver',
diff --git a/neutron/tests/unit/services/vpn/test_vpn_agent.py b/neutron/tests/unit/services/vpn/test_vpn_agent.py
index f22c18c0bff..4e60435178f 100644
--- a/neutron/tests/unit/services/vpn/test_vpn_agent.py
+++ b/neutron/tests/unit/services/vpn/test_vpn_agent.py
@@ -52,6 +52,8 @@ class TestVPNAgent(base.BaseTestCase):
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(l3_agent.L3NATAgent.OPTS)
         self.conf.register_opts(interface.OPTS)
+        agent_config.register_interface_driver_opts_helper(self.conf)
+        agent_config.register_use_namespaces_opts_helper(self.conf)
         agent_config.register_agent_state_opts_helper(self.conf)
         agent_config.register_root_helper(self.conf)
 
diff --git a/neutron/tests/unit/test_debug_commands.py b/neutron/tests/unit/test_debug_commands.py
index de60b0adc9d..15b62f0e66f 100644
--- a/neutron/tests/unit/test_debug_commands.py
+++ b/neutron/tests/unit/test_debug_commands.py
@@ -40,8 +40,10 @@ class TestDebugCommands(base.BaseTestCase):
         cfg.CONF.register_opts(interface.OPTS)
         cfg.CONF.register_opts(NeutronDebugAgent.OPTS)
         cfg.CONF(args=[], project='neutron')
-        cfg.CONF.set_override('use_namespaces', True)
+        config.register_interface_driver_opts_helper(cfg.CONF)
+        config.register_use_namespaces_opts_helper(cfg.CONF)
         config.register_root_helper(cfg.CONF)
+        cfg.CONF.set_override('use_namespaces', True)
 
         self.addCleanup(mock.patch.stopall)
         device_exists_p = mock.patch(
diff --git a/neutron/tests/unit/test_dhcp_agent.py b/neutron/tests/unit/test_dhcp_agent.py
index f9f2002f3f3..e544118fee2 100644
--- a/neutron/tests/unit/test_dhcp_agent.py
+++ b/neutron/tests/unit/test_dhcp_agent.py
@@ -156,6 +156,7 @@ class TestDhcpAgent(base.BaseTestCase):
                             'dhcp', '--config-file',
                             etcdir('neutron.conf.test')]
                         cfg.CONF.register_opts(dhcp_agent.DhcpAgent.OPTS)
+                        config.register_interface_driver_opts_helper(cfg.CONF)
                         config.register_agent_state_opts_helper(cfg.CONF)
                         config.register_root_helper(cfg.CONF)
                         cfg.CONF.register_opts(dhcp.OPTS)
@@ -449,6 +450,7 @@ class TestLogArgs(base.BaseTestCase):
 class TestDhcpAgentEventHandler(base.BaseTestCase):
     def setUp(self):
         super(TestDhcpAgentEventHandler, self).setUp()
+        config.register_interface_driver_opts_helper(cfg.CONF)
         cfg.CONF.register_opts(dhcp.OPTS)
         cfg.CONF.set_override('interface_driver',
                               'neutron.agent.linux.interface.NullDriver')
@@ -1087,6 +1089,8 @@ class FakeV4NetworkNoGateway:
 class TestDeviceManager(base.BaseTestCase):
     def setUp(self):
         super(TestDeviceManager, self).setUp()
+        config.register_interface_driver_opts_helper(cfg.CONF)
+        config.register_use_namespaces_opts_helper(cfg.CONF)
         cfg.CONF.register_opts(dhcp_agent.DhcpAgent.OPTS)
         cfg.CONF.register_opts(dhcp.OPTS)
         cfg.CONF.set_override('interface_driver',
diff --git a/neutron/tests/unit/test_l3_agent.py b/neutron/tests/unit/test_l3_agent.py
index f2008f637e0..9fb0e6dfb43 100644
--- a/neutron/tests/unit/test_l3_agent.py
+++ b/neutron/tests/unit/test_l3_agent.py
@@ -43,6 +43,8 @@ class TestBasicRouterOperations(base.BaseTestCase):
         self.conf = cfg.ConfigOpts()
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(l3_agent.L3NATAgent.OPTS)
+        agent_config.register_interface_driver_opts_helper(self.conf)
+        agent_config.register_use_namespaces_opts_helper(self.conf)
         agent_config.register_root_helper(self.conf)
         self.conf.register_opts(interface.OPTS)
         self.conf.set_override('router_id', 'fake_id')
diff --git a/neutron/tests/unit/test_linux_dhcp.py b/neutron/tests/unit/test_linux_dhcp.py
index 146043341de..c50afa7889d 100644
--- a/neutron/tests/unit/test_linux_dhcp.py
+++ b/neutron/tests/unit/test_linux_dhcp.py
@@ -394,6 +394,7 @@ class TestBase(base.BaseTestCase):
         self.conf = config.setup_conf()
         self.conf.register_opts(base_config.core_opts)
         self.conf.register_opts(dhcp.OPTS)
+        config.register_interface_driver_opts_helper(self.conf)
         instance = mock.patch("neutron.agent.linux.dhcp.DeviceManager")
         self.mock_mgr = instance.start()
         self.conf.register_opt(cfg.BoolOpt('enable_isolated_metadata',
diff --git a/neutron/tests/unit/test_linux_interface.py b/neutron/tests/unit/test_linux_interface.py
index 43ebd093a3c..09bf8df27fd 100644
--- a/neutron/tests/unit/test_linux_interface.py
+++ b/neutron/tests/unit/test_linux_interface.py
@@ -373,6 +373,7 @@ class TestBridgeInterfaceDriver(TestBase):
 class TestMetaInterfaceDriver(TestBase):
     def setUp(self):
         super(TestMetaInterfaceDriver, self).setUp()
+        config.register_interface_driver_opts_helper(self.conf)
         self.conf.register_opts(dhcp.OPTS)
         self.client_cls_p = mock.patch('neutronclient.v2_0.client.Client')
         client_cls = self.client_cls_p.start()