diff --git a/neutron_tempest_plugin/bgpvpn/scenario/manager.py b/neutron_tempest_plugin/bgpvpn/scenario/manager.py
index f5e9bf2..b65407d 100644
--- a/neutron_tempest_plugin/bgpvpn/scenario/manager.py
+++ b/neutron_tempest_plugin/bgpvpn/scenario/manager.py
@@ -241,10 +241,14 @@
         if not subnets_client:
             subnets_client = self.subnets_client
         tenant_cidr = kwargs.get('cidr')
+        # reserving pool for Neutron service ports
+        net = netaddr.IPNetwork(tenant_cidr)
+        allocation_pools = [{'start': str(net[2]), 'end': str(net[9])}]
         subnet = dict(
             name=data_utils.rand_name(namestart),
             network_id=network['id'],
             tenant_id=network['tenant_id'],
+            allocation_pools=allocation_pools,
             **kwargs)
         result = subnets_client.create_subnet(**subnet)
         self.assertIsNotNone(result, 'Unable to allocate tenant network')