Index: package/base-files/files/lib/network/config.sh
===================================================================
--- package/base-files/files/lib/network/config.sh      (revision 9340)
+++ package/base-files/files/lib/network/config.sh      (working copy)
@@ -88,6 +88,7 @@

        # Setup bridging
        config_get iftype "$config" type
+       config_get stp "$config" stp
        case "$iftype" in
                bridge)
                        [ -x /usr/sbin/brctl ] && {
@@ -99,6 +100,7 @@
                                        $DEBUG brctl setfd "br-$config" 0
                                        $DEBUG ifconfig "br-$config" up
                                        $DEBUG brctl addif "br-$config" "$iface"
+                                       $DEBUG brctl stp "br-$config" ${stp:-on}
                                        # Creating the bridge here will have triggered a hotplug event, which will
                                        # result in another setup_interface() call, so we simply stop processing
                                        # the current event at this point.
Index: package/base-files/files/etc/config/network
===================================================================
--- package/base-files/files/etc/config/network (revision 9340)
+++ package/base-files/files/etc/config/network (working copy)
@@ -12,3 +12,4 @@
        option proto    static
        option ipaddr   192.168.1.1
        option netmask  255.255.255.0
+       option stp      on