{
    $is_vlan = "no";
    if ( ( exists $ExternalInterface{VLAN} && $ExternalInterface{VLAN} =~ /^\d+$/ ) && ($is_external || ( $ExternalInterface{Configuration} eq "pppoe") && $pppoe{PhysicalInterface}  eq $THIS_DEVICE ) )
    {
	$ifup_this_device = "yes";
        $is_vlan = "yes";
    }

    "";
}
