diff --git a/nova/network/neutronv2/api.py b/nova/network/neutronv2/api.py
index c548e6bbf3b4..e26da18a0d16 100644
--- a/nova/network/neutronv2/api.py
+++ b/nova/network/neutronv2/api.py
@@ -2231,7 +2231,11 @@ class API(base_api.NetworkAPI):
         :return: A list of RequestGroup objects
         """
 
-        neutron = get_client(context)
+        # NOTE(gibi): We need to use an admin client as otherwise a non admin
+        # initiated resize causes that neutron does not fill the
+        # resource_request field of the port and this will lead to resource
+        # allocation issues. See bug 1849695
+        neutron = get_client(context, admin=True)
         # get the ports associated to this instance
         data = neutron.list_ports(
             device_id=instance_uuid, fields=['id', 'resource_request'])
diff --git a/nova/tests/unit/network/test_neutronv2.py b/nova/tests/unit/network/test_neutronv2.py
index 2174746beb37..6a33e9ff042f 100644
--- a/nova/tests/unit/network/test_neutronv2.py
+++ b/nova/tests/unit/network/test_neutronv2.py
@@ -6151,6 +6151,8 @@ class TestNeutronv2WithMock(TestNeutronv2Base):
             uuids.port1,
             request_groups[0].requester_id)
 
+        mock_get_client.assert_called_once_with(self.context, admin=True)
+
 
 class TestNeutronv2ModuleMethods(test.NoDBTestCase):