diff --git a/api-ref/source/v2/intro.inc b/api-ref/source/v2/intro.inc
index 9c063c7fb..05a0197b4 100644
--- a/api-ref/source/v2/intro.inc
+++ b/api-ref/source/v2/intro.inc
@@ -156,6 +156,12 @@ that have ``device_id`` attribute with empty value (which are unbound ports).
 To determine if this feature is supported, a user can check whether the
 ``empty-string-filtering`` extension API is available.
 
+Starting from Rocky release, the Networking API will perform validation
+on filtering attributes if the API extension ``filter-validation`` is
+available. If an API request contains an unknown or unsupported
+parameter, the server will return a ``400`` response instead of silently
+ignoring the invalid input.
+
 Note
 ----
 
diff --git a/neutron_lib/api/definitions/__init__.py b/neutron_lib/api/definitions/__init__.py
index 4081b04a1..4f0fc4eef 100644
--- a/neutron_lib/api/definitions/__init__.py
+++ b/neutron_lib/api/definitions/__init__.py
@@ -33,6 +33,7 @@ from neutron_lib.api.definitions import empty_string_filtering
 from neutron_lib.api.definitions import external_net
 from neutron_lib.api.definitions import extra_dhcp_opt
 from neutron_lib.api.definitions import extraroute
+from neutron_lib.api.definitions import filter_validation
 from neutron_lib.api.definitions import fip64
 from neutron_lib.api.definitions import fip_port_details
 from neutron_lib.api.definitions import firewall
@@ -118,6 +119,7 @@ _ALL_API_DEFINITIONS = {
     external_net,
     extra_dhcp_opt,
     extraroute,
+    filter_validation,
     fip64,
     firewall,
     firewall_v2,
diff --git a/neutron_lib/api/definitions/base.py b/neutron_lib/api/definitions/base.py
index 4490425c3..a2213b4eb 100644
--- a/neutron_lib/api/definitions/base.py
+++ b/neutron_lib/api/definitions/base.py
@@ -91,6 +91,7 @@ KNOWN_EXTENSIONS = (
     'external-net',
     'extra_dhcp_opt',
     'extraroute',
+    'filter-validation',
     'fip-port-details',
     'flavors',
     'floating-ip-port-forwarding',
diff --git a/neutron_lib/api/definitions/filter_validation.py b/neutron_lib/api/definitions/filter_validation.py
new file mode 100644
index 000000000..a79ede04b
--- /dev/null
+++ b/neutron_lib/api/definitions/filter_validation.py
@@ -0,0 +1,25 @@
+#    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.
+
+
+ALIAS = 'filter-validation'
+IS_SHIM_EXTENSION = True
+IS_STANDARD_ATTR_EXTENSION = False
+NAME = 'Filter parameters validation'
+DESCRIPTION = 'Provides validation on filter parameters.'
+UPDATED_TIMESTAMP = '2018-07-04T10:00:00-00:00'
+RESOURCE_ATTRIBUTE_MAP = {}
+SUB_RESOURCE_ATTRIBUTE_MAP = {}
+ACTION_MAP = {}
+REQUIRED_EXTENSIONS = []
+OPTIONAL_EXTENSIONS = []
+ACTION_STATUS = {}
diff --git a/neutron_lib/tests/unit/api/definitions/test_filter_validation.py b/neutron_lib/tests/unit/api/definitions/test_filter_validation.py
new file mode 100644
index 000000000..623b98cf2
--- /dev/null
+++ b/neutron_lib/tests/unit/api/definitions/test_filter_validation.py
@@ -0,0 +1,18 @@
+#    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.
+
+from neutron_lib.api.definitions import filter_validation as apidef
+from neutron_lib.tests.unit.api.definitions import base
+
+
+class FilterValidationiDefinitionTestCase(base.DefinitionBaseTestCase):
+    extension_module = apidef
diff --git a/releasenotes/notes/add-filter-validation-api-extension-15cc667d5498f163.yaml b/releasenotes/notes/add-filter-validation-api-extension-15cc667d5498f163.yaml
new file mode 100644
index 000000000..70f9617fa
--- /dev/null
+++ b/releasenotes/notes/add-filter-validation-api-extension-15cc667d5498f163.yaml
@@ -0,0 +1,12 @@
+---
+features:
+  - |
+    Add API extension ``filter-validation``. This extension indicates if the
+    server supports validation on filter parameters of the list requests.
+other:
+  - |
+    API extension ``filter-validation`` relies on the ``is_filter`` keyword
+    in the ``RESOURCE_ATTRIBUTE_MAP`` to judge if an attribute can be used as
+    filter. Neutron plugins which want to support filter validation
+    needs to set ``is_filter`` to ``True`` for each attribute in their
+    resource attribute map.