| `start` | Start time in UTC of the test. Check the [schedule](https://user.flocklab.ethz.ch/calendar.php) for free slots. If no start time is provided, the test will run as soon as possible. | `YYYY-mm-ddTHH:MM:SSZ`, e.g. 2011-08-20T16:00:00Z |
| `start` | Start time in UTC of the test. Check the [schedule](https://user.flocklab.ethz.ch/calendar.php) for free slots. If no start time is provided, the test will run as soon as possible. | `YYYY-mm-ddTHH:MM:SSZ`, e.g. 2011-08-20T16:00:00Z |
| `duration`* | Duration of the test in seconds. | min. is 20 seconds, max. is limited by the users quota |
| `duration`* | Duration of the test in seconds. | min. is 20 seconds, max. is limited by the users quota <sup>1</sup>|
\* mandatory elements
\* mandatory elements
<sup>1</sup> During office hours (0700 - 1700 GMT), the max. scheduled test duration per user is limited to 30min.