diff --git a/neutron/common/ovn/utils.py b/neutron/common/ovn/utils.py
index 902f8d22e6c..1367351a491 100644
--- a/neutron/common/ovn/utils.py
+++ b/neutron/common/ovn/utils.py
@@ -263,6 +263,11 @@ def validate_and_get_data_from_binding_profile(port):
                 ) % constants.PORT_CAP_PARAM
         raise n_exc.InvalidInput(error_message=msg)
 
+    # Note that only the keys mentioned in each parameter set, as defined in
+    # constants.OVN_PORT_BINDING_PROFILE_PARAMS, will be evaluated.
+    #
+    # Any surplus keys provided by Nova will be ignored and pruned from the
+    # Dict returned by this function.
     for pbp_param_set in constants.OVN_PORT_BINDING_PROFILE_PARAMS:
         if pbp_param_set.vnic_type:
             if pbp_param_set.vnic_type != vnic_type:
@@ -278,13 +283,10 @@ def validate_and_get_data_from_binding_profile(port):
                 pass
         if len(param_dict) == 0:
             continue
-        if len(param_dict) != len(param_keys):
+        if param_keys - binding_profile.keys():
             msg = _('Invalid binding:profile. %s are all '
                     'required.') % param_keys
             raise n_exc.InvalidInput(error_message=msg)
-        if (len(binding_profile) != len(param_keys)):
-            msg = _('Invalid binding:profile. too many parameters')
-            raise n_exc.InvalidInput(error_message=msg)
         break
 
     if not param_dict:
diff --git a/neutron/tests/unit/common/ovn/test_utils.py b/neutron/tests/unit/common/ovn/test_utils.py
index cee8e250fba..c7606283f22 100644
--- a/neutron/tests/unit/common/ovn/test_utils.py
+++ b/neutron/tests/unit/common/ovn/test_utils.py
@@ -531,7 +531,7 @@ class TestValidateAndGetDataFromBindingProfile(base.BaseTestCase):
             constants.OVNPortBindingProfileParamSet(
                 {
                     'key': [str],
-                    'other_key': [str],
+                    'other_key': [int],
                     'third_key': [str]
                 },
                 self.VNIC_FAKE_OTHER, constants.PORT_CAP_SWITCHDEV),
@@ -647,6 +647,24 @@ class TestValidateAndGetDataFromBindingProfile(base.BaseTestCase):
                  constants.OVN_PORT_BINDING_PROFILE: expect}),
             expect)
 
+    def test_valid_input_surplus_keys(self):
+        # Confirm that extra keys are allowed
+        binding_profile = {
+            constants.PORT_CAP_PARAM: [constants.PORT_CAP_SWITCHDEV],
+            'pci_vendor_info': 'dead:beef',
+            'pci_slot': '0000:ca:fe.42',
+            'physical_network': 'physnet1',
+            'optional_information_provided_by_nova': 'not_consumed_by_neutron',
+        }
+        expect = binding_profile.copy()
+        del(expect[constants.PORT_CAP_PARAM])
+        del(expect['optional_information_provided_by_nova'])
+        self.assertDictEqual(
+            expect,
+            utils.validate_and_get_data_from_binding_profile(
+                {portbindings.VNIC_TYPE: portbindings.VNIC_DIRECT,
+                 constants.OVN_PORT_BINDING_PROFILE: binding_profile}))
+
     def test_unknown_profile_items_pruned(self):
         # Confirm that unknown profile items are pruned
         self.assertEqual(
@@ -684,36 +702,41 @@ class TestValidateAndGetDataFromBindingProfile(base.BaseTestCase):
 
     def test_overlapping_param_set_different_vnic_type(self):
         # Confirm overlapping param sets discerned by vnic_type
-        expect = {
+        binding_profile = {
             'key': 'value',
             'other_key': 'value',
         }
-        # This param set is not valid for VNIC_FAKE_NORMAL
-        self.assertRaises(
-            neutron_lib.exceptions.InvalidInput,
-            utils.validate_and_get_data_from_binding_profile,
-            {portbindings.VNIC_TYPE: self.VNIC_FAKE_NORMAL,
-             constants.OVN_PORT_BINDING_PROFILE: expect})
+        # This param set is valid for VNIC_FAKE_NORMAL with 'other_key' pruned.
+        expect = binding_profile.copy()
+        del(expect['other_key'])
+        self.assertDictEqual(
+            expect,
+            utils.validate_and_get_data_from_binding_profile(
+                {portbindings.VNIC_TYPE: self.VNIC_FAKE_NORMAL,
+                 constants.OVN_PORT_BINDING_PROFILE: binding_profile}))
         # It is valid for VNIC_FAKE_OTHER
+        expect = binding_profile.copy()
         self.assertDictEqual(
             expect,
             utils.validate_and_get_data_from_binding_profile(
                 {portbindings.VNIC_TYPE: self.VNIC_FAKE_OTHER,
-                 constants.OVN_PORT_BINDING_PROFILE: expect}))
+                 constants.OVN_PORT_BINDING_PROFILE: binding_profile}))
 
     def test_overlapping_param_set_different_vnic_type_and_capability(self):
         # Confirm overlapping param sets discerned by vnic_type and capability
-        expect = {
+        binding_profile = {
             'key': 'value',
-            'other_key': 'value',
+            'other_key': 42,
             'third_key': 'value',
         }
         # This param set is not valid for VNIC_FAKE_OTHER without capability
+        expect = binding_profile.copy()
+        del(expect['third_key'])
         self.assertRaises(
             neutron_lib.exceptions.InvalidInput,
             utils.validate_and_get_data_from_binding_profile,
             {portbindings.VNIC_TYPE: self.VNIC_FAKE_OTHER,
-             constants.OVN_PORT_BINDING_PROFILE: expect})
+             constants.OVN_PORT_BINDING_PROFILE: binding_profile})
         # This param set is also not valid as the capabilities do not match
         binding_profile = {
             constants.PORT_CAP_PARAM: ['fake-capability'],
@@ -730,7 +753,7 @@ class TestValidateAndGetDataFromBindingProfile(base.BaseTestCase):
         binding_profile = {
             constants.PORT_CAP_PARAM: [constants.PORT_CAP_SWITCHDEV],
             'key': 'value',
-            'other_key': 'value',
+            'other_key': 42,
             'third_key': 'value',
         }
         expect = binding_profile.copy()
diff --git a/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py b/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py
index 811b58c10bf..8fe321c5040 100644
--- a/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py
+++ b/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py
@@ -3984,7 +3984,7 @@ class TestOVNVtepPortBinding(OVNMechanismDriverTestCase):
             with self.subnet(n):
                 self._create_port(self.fmt, n['network']['id'],
                                   arg_list=(OVN_PROFILE,),
-                                  expected_res_status=400,
+                                  expected_res_status=404,
                                   **binding)
 
     def test_create_port_with_vtep_options_and_check_vtep_keys(self):