type: txt
help: Underlay device name of this VXLAN interface
allowed: ${vyatta_sbindir}/vyatta-interfaces.pl --show all && echo default
val_help:<interface>; Interface to be used as underlay of VXLAN interface

update:
  if [ ! -e /tmp/vxlan-$VAR(../@)-create ]; then
    echo "Chainging dev requires delete/create this vxlan interface"
    exit 1
  fi