Dell Mellanox Family of Adapters - Manual (Page 56)

Driver Installation and Configuration Rev 1.1
Mellanox Technologies 56
» To query network uplinks installed on your machine, run:
The number of uplinks claimed by MLX4_EN driver should be displayed.
#> esxcli network nic list
In Non Multifunction Mode, port 2 is identified as a pseudo device. Therefore devices
are not seen by vSphere when added as uplink.