-if=$(nvram get ${type}_ifname)
-proto=$(nvram get ${type}_proto)
-if_valid $if && $DEBUG ifconfig $if down
-kill $(cat /var/run/${if}.pid 2>&-) 2>&-
-killall ifup.$proto >&- 2>&-
-case "$proto" in
- pptp|pppoe) killall pppd >&- 2>&- ;;
- static) env -i ACTION="ifdown" INTERFACE="$if" PROTO=static /sbin/hotplug "iface" ;;