openadk/package/base-files/extra/etc/network/if-post-down.d/01-bridge

#!/bin/sh
  
if [ ! -x /usr/sbin/brctl ]
then
  exit 0
fi

case "$IF_BRIDGE_PORTS" in
    "")
        exit 0
        ;;
    none)
        INTERFACES=""
        ;;
    *)
        INTERFACES="$IF_BRIDGE_PORTS"
        ;;
esac
  
for IF in $INTERFACES; do
  ip link set down dev $IF && brctl delif $IFACE $IF
done

ip link set down dev $IFACE || exit 1