diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index e5a7b76..437aaeb 100644
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -62,6 +62,9 @@
     if [[ "$LB_INTERFACE_MAPPINGS" == "" ]] && [[ "$PHYSICAL_NETWORK" != "" ]] && [[ "$LB_PHYSICAL_INTERFACE" != "" ]]; then
         LB_INTERFACE_MAPPINGS=$PHYSICAL_NETWORK:$LB_PHYSICAL_INTERFACE
     fi
+    if [[ "$PUBLIC_BRIDGE" != "" ]] && [[ "$PUBLIC_PHYSICAL_NETWORK" != "" ]]; then
+        iniset /$Q_PLUGIN_CONF_FILE linux_bridge bridge_mappings "$PUBLIC_PHYSICAL_NETWORK:$PUBLIC_BRIDGE"
+    fi
     if [[ "$LB_INTERFACE_MAPPINGS" != "" ]]; then
         iniset /$Q_PLUGIN_CONF_FILE linux_bridge physical_interface_mappings $LB_INTERFACE_MAPPINGS
     fi