diff --git a/tempest/api/network/test_dhcp_ipv6.py b/tempest/api/network/test_dhcp_ipv6.py
index c1462db..4bc4262 100644
--- a/tempest/api/network/test_dhcp_ipv6.py
+++ b/tempest/api/network/test_dhcp_ipv6.py
@@ -20,6 +20,7 @@
 
 from tempest.api.network import base
 from tempest.common.utils import data_utils
+from tempest.common.utils import net_info
 from tempest import config
 from tempest.lib import exceptions as lib_exc
 from tempest import test
@@ -66,7 +67,7 @@
         body = self.ports_client.list_ports()
         ports = body['ports']
         for port in ports:
-            if (port['device_owner'].startswith('network:router_interface') and
+            if (net_info.is_router_interface_port(port) and
                 port['device_id'] in [r['id'] for r in self.routers]):
                 self.routers_client.remove_router_interface(port['device_id'],
                                                             port_id=port['id'])
diff --git a/tempest/cmd/cleanup_service.py b/tempest/cmd/cleanup_service.py
index 9758061..32b0ebb 100644
--- a/tempest/cmd/cleanup_service.py
+++ b/tempest/cmd/cleanup_service.py
@@ -18,6 +18,7 @@
 
 from tempest.common import credentials_factory as credentials
 from tempest.common import identity
+from tempest.common.utils import net_info
 from tempest import config
 from tempest import test
 
@@ -463,7 +464,7 @@
                 rid = router['id']
                 ports = [port for port
                          in ports_client.list_ports(device_id=rid)['ports']
-                         if port["device_owner"] == "network:router_interface"]
+                         if net_info.is_router_interface_port(port)]
                 for port in ports:
                     client.remove_router_interface(rid, port_id=port['id'])
                 client.delete_router(rid)
diff --git a/tempest/common/utils/net_info.py b/tempest/common/utils/net_info.py
new file mode 100644
index 0000000..9b0a083
--- /dev/null
+++ b/tempest/common/utils/net_info.py
@@ -0,0 +1,25 @@
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+import re
+
+RE_OWNER = re.compile('^network:.*router_.*interface.*')
+
+
+def _is_owner_router_interface(owner):
+    return bool(RE_OWNER.match(owner))
+
+
+def is_router_interface_port(port):
+    """Based on the port attributes determines is it a router interface."""
+    return _is_owner_router_interface(port['device_owner'])
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 2c16be8..32f5d9f 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -17,6 +17,7 @@
 
 from tempest import clients
 from tempest.common.utils import data_utils
+from tempest.common.utils import net_info
 from tempest import config
 from tempest.scenario import manager
 from tempest import test
@@ -247,16 +248,10 @@
         myport = (tenant.router['id'], tenant.subnet['id'])
         router_ports = [(i['device_id'], i['fixed_ips'][0]['subnet_id']) for i
                         in self._list_ports()
-                        if self._is_router_port(i)]
+                        if net_info.is_router_interface_port(i)]
 
         self.assertIn(myport, router_ports)
 
-    def _is_router_port(self, port):
-        """Return True if port is a router interface."""
-        # NOTE(armando-migliaccio): match device owner for both centralized
-        # and distributed routers; 'device_owner' is "" by default.
-        return port['device_owner'].startswith('network:router_interface')
-
     def _create_server(self, name, tenant, security_groups, **kwargs):
         """Creates a server and assigns it to security group.