diff --git a/tempest/config.py b/tempest/config.py
index 0a084ea..82a0a93 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -787,6 +787,9 @@
                 default=False,
                 help="The environment does not support network separation "
                      "between tenants."),
+    cfg.IntOpt('service_ports_number',
+               default=0,
+               help="Number of neutron service ports created per network"),
 ]
 
 network_feature_group = cfg.OptGroup(name='network-feature-enabled',