iDRAC Network vmkernel created on standard vswitch during install?

Hi,

After going through an install of VxRail, I noticed that there was a standard vswitch created (in addition to my normal production dvswitch) that has a iDRAC Network VMkernel port with a random IP address.  There is one physical adapter on this switch called vusb0.  Can anyone explain to me what this is used for and/or if it can be deleted as it was created in error? 

See screenshot for example