my $cmd;

unless( $cmd = $memory{"cmd_$args{frequency}"} ) {
    &uxmon::load_module( "cmd" );
    &uxmon::checker(
	$memory{"cmd_$args{frequency}"} = $cmd = Monitor::cmd->new()
    );
    $cmd->sched_frequency( $args{"frequency"} );
}

$cmd->add_check( $args{"alias"}.".dns", "host -R 2 -W 4 $args{host} $args{host}", 
		 [ 0, "green", "dns OK" ], [ "timeout", "red", "dns TIMEOUT" ], [ "*", "red", "dns FAILURE" ] );
