--- /lib/rcscripts/net.modules.d/bridge
+++ /lib/rcscripts/net.modules.d/bridge	
@@ -121,7 +121,8 @@
 		ebegin "Adding port ${i}"
 		e=$( brctl addif ${iface} ${i} 2>&1 \
 			&& interface_del_addresses ${i} \
-			&& interface_set_flag ${i} promisc true )
+			&& interface_set_flag ${i} promisc true \
+			&& interface_up ${i} )
 		if [[ -n ${e} ]]; then
 			eend 1 "${e}"
 			return 1