foreach my $ns ( grep {defined} @_ ) {
  if ( _ipv4($ns) || _ipv6($ns) ) {
    push @ip, $ns;
  } else {
    my $defres = ref($self)->new( debug => $self->{debug} );
    $defres->{persistent} = $self->{persistent};
    my $names  = {};
    my $packet = $defres->send( $ns, 'A' );