This article explains how to update the Mainboard firmware of a VRTX.
Download the lastest firmware BIN update package on the Dell support site
The latest version is Mainboard version 2.21, click to download, or ideally visit Dell Drivers and Downloads for the latest available version as updates are provided regularly.
Log into the CMC IP with the admin credentials (by default root / calvin) :
In the console, click on Chassis Overview > Chassis Controller > Update
In the Firmware Update page select the checkbox for the Mainboard, then click on Apply Chassis Infrastructure Firmware
The mainboard will move in state Ready
Upload the Update Package using the Browse ... button, then click on Begin Firmware Update
Mainboard will be updated