openbsd, vagrant, virtualbox, ipv6

$inet6em1='echo "inet6 $1" >> /etc/hostname.em1 && sh /etc/netstart em1'
$inet6carp=<<SCRIPT
echo "vhid 6 carpdev em1\ninet6 $1" > /etc/hostname.carp6 && sh /etc/netstart carp6
SCRIPT
$v6fwd="v=net.inet6.ip6.forwarding=1 ; sysctl -w $v ; echo $v >> /etc/sysctl.conf"

Vagrant.configure("2") do |config|
  config.vm.define "internet" do |v|
    v.vm.box = "openbsd"
    v.vm.network :private_network, ip: "10.123.0.3"
    v.vm.hostname = "internet"
    v.vm.provider :virtualbox do |vb|
      vb.customize ["modifyvm", :id, "--nicpromisc2", "allow-vms"]
    end
    v.vm.provision "shell", inline: $inet6em1, args: "cafe:ea8:100:25::1/64"
    v.vm.provision "shell", inline: "route -n add -inet6 cafe:ea8:8110::/48 cafe:ea8:100:25::2"
  end
    config.vm.define "gateway" do |v|
    v.vm.box = "openbsd"
    v.vm.network :private_network, ip: "10.123.0.2"
    v.vm.hostname = "gateway"
    v.vm.provider :virtualbox do |vb|
      vb.customize ["modifyvm", :id, "--nicpromisc2", "allow-vms"]
    end
    v.vm.provision "shell", inline: $v6fwd
    v.vm.provision "shell", inline: $inet6carp, args: "cafe:ea8:100:25::2/64"
    v.vm.provision "shell", inline: $inet6em1, args: "cafe:ea8:8110::1/56"
   end
  end
end