diff --git a/lib/neutron_plugins/brocade b/lib/neutron_plugins/brocade
index 1b42e7794e..310b72e5ad 100644
--- a/lib/neutron_plugins/brocade
+++ b/lib/neutron_plugins/brocade
@@ -54,7 +54,6 @@ function neutron_plugin_configure_dhcp_agent {
 }
 
 function neutron_plugin_configure_l3_agent {
-    iniset $Q_L3_CONF_FILE DEFAULT external_network_bridge
     iniset $Q_L3_CONF_FILE DEFAULT l3_agent_manager neutron.agent.l3_agent.L3NATAgentWithStateReport
 }
 
diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index f1216377fa..dfed49b5e4 100755
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -48,7 +48,6 @@ function neutron_plugin_configure_l3_agent {
     local conf_file=$1
     sudo brctl addbr $PUBLIC_BRIDGE
     set_mtu $PUBLIC_BRIDGE $PUBLIC_BRIDGE_MTU
-    iniset $conf_file DEFAULT external_network_bridge
 }
 
 function neutron_plugin_configure_plugin_agent {
diff --git a/lib/neutron_plugins/ovs_base b/lib/neutron_plugins/ovs_base
index 795d2bb5b2..1a97001824 100644
--- a/lib/neutron_plugins/ovs_base
+++ b/lib/neutron_plugins/ovs_base
@@ -87,9 +87,7 @@ function _neutron_ovs_base_configure_firewall_driver {
 }
 
 function _neutron_ovs_base_configure_l3_agent {
-    if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" = "True" ]; then
-        iniset $Q_L3_CONF_FILE DEFAULT external_network_bridge ""
-    else
+    if [ "$Q_USE_PROVIDERNET_FOR_PUBLIC" != "True" ]; then
         iniset $Q_L3_CONF_FILE DEFAULT external_network_bridge $PUBLIC_BRIDGE
     fi