Cisco UCS B200 M4 blade server requires a Cisco UCS Fabric Interconnect, such as the UCS-FI-6248UP for full functionality, including advanced management and networking when it is integrated with UCS Manager and connected via a Fabric Interconnect. Re...

I found an article which may be helpful https://www.techtarget.com/searchvmware/answer/How-do-you-change-ESXi-65-host-names-and-DNS-configuration

It sounds like you are experiencing a hardware issue with your Cisco UCS B200 M4 server blade that is preventing it from completing its boot process. The solid amber blade health LED typically indicates a critical hardware problem. Please Contact Sup...