Change multipathing policy to RoundRobin on ESXi 5.x

1.       Select an ESXi host you want to modify, and click the Configuration tab.
2.       Click Storage.
3.       Select a datastore or mapped LUN.
4.       Click Properties.
5.       In the Properties dialog, select the desired extent, if necessary.
6.       Click Extent Device > Manage Paths and obtain the paths in the Manage Path dialog.
7.       Under the Policy section, select the desired multipathing policy from the dropdown.

8.       Click Change to confirm the change in path policy.