/etc/rc.conf for bridge

cloned_interfaces="bridge0"
ifconfig_bridge0_alias0="203.31.81.6/32"
ifconfig_bridge0_alias1="203.31.81.11/32"
ifconfig_bridge0="addm bge0 up 203.31.81.10 netmask 0xffffffc0"
ifconfig_bge0="up"