{
    my $this_device;

    $this_device = \%InternalInterface if $is_internal;
    $this_device = \%ExternalInterface if $is_external;
    return unless $this_device;

    my $OVH = $this_device->{OVH} || 'no';

    if ($OVH eq 'yes')
        {return 'DEFROUTE=no';}
}