diff --git a/tempest/config.py b/tempest/config.py
index eeedc9a..9e29ff1 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -887,6 +887,9 @@
                default=120,
                help="Total time in seconds to keep retrying a request that "
                     "returns HTTP 409 (Conflict)."),
+    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',