diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index bbf5c6dc8..26221c73e 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -290,12 +290,6 @@ function configure_df_plugin {
         iniset $DRAGONFLOW_CONF df_snat_app external_network_bridge "$PUBLIC_BRIDGE"
     fi
 
-    if [[ "$DF_PUB_SUB" == "True" ]]; then
-        DF_SELECTIVE_TOPO_DIST=${DF_SELECTIVE_TOPO_DIST:-"True"}
-    else
-        DF_SELECTIVE_TOPO_DIST="False"
-    fi
-
     iniset $DRAGONFLOW_CONF df enable_selective_topology_distribution \
                             "$DF_SELECTIVE_TOPO_DIST"
     configure_df_metadata_service
diff --git a/devstack/settings b/devstack/settings
index 3a4e2f7b4..4dcdeddd7 100644
--- a/devstack/settings
+++ b/devstack/settings
@@ -46,3 +46,4 @@ DF_REDIS_INSTALL_FROM_RUBY=${DF_REDIS_INSTALL_FROM_RUBY:-"True"}
 
 DF_RUBY_SOURCE_ADD=${DF_RUBY_SOURCE_ADD:-"https://rubygems.org/"}
 DF_RUBY_SOURCE_REMOVE=${DF_RUBY_SOURCE_REMOVE:-""}
+DF_SELECTIVE_TOPO_DIST=${DF_SELECTIVE_TOPO_DIST:-"False"}