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Author: Steve Sumichrast

Booting ESXi in UEFI mode on Cisco UCS

Note: This process should work for Windows and Linux as well.  Verify the EFI boot path for the OS.

Through ESXi 6.0 I have run my hosts in Legacy BIOS mode on UCS.  There just was nothing significant enough worth the hassle of switching to UEFI on UCS (rather: I had more important fires to put out…).  The one feature I did want, Secure Boot, wasn’t supported by ESXi 6.0 and earlier.

vSphere 6.5 introduced support for Secure Boot.   Mike Foley has a great blog post about Secure Boot in ESXi 6.5.  If you are starting your 6.5 upgrade and are using Legacy mode, consider switching to UEFI.  It’s minimal effort and increases the security of your hypervisor.

Since I was working on rolling out a new UCS environment with ESXi 6.5 in a remote office environment, this felt like a great time to switch to UEFI and get the benefits of Secure Boot.  This is not complicated on UCS, but there is a new Boot Policy that must be created.  This policy can be reused for Windows (and other OS).

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Legrand Home Automation DNS Change

We built our house a few years ago.  Before all the drywall went up I wired tons of networking into each room, including for for the Legrand Home Automation system and whole house audio.  The core home automation module, the HA7000, is the integration work engine of the system.  It connects to Legrand’s cloud servers for remote alerting, updating, etc.  On February 20th, 2018 they had a significant service outage and their restoration procedure is not so seamless.  Rather than following their instructions of changing my home router’s DNS forwarder I broke out tcpdump and did some digging.  So if you have a Legrand system, need to do this update, and don’t want to pass your DNS traffic to them, read on.

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Are you registered for VMworld 2018?

It’s almost VMworld time!

Have you checked out the VMworld site yet and registered?  VMworld 2018 is being held in Las Vegas at the Mandalay Bay from August 26 – August 30.


VMworld is by far the conference I look forward to the most each and every year, and I can hardly believe it’s almost VMworld time again!  Each year VMworld gets bigger and better, and I am sure 2018 will be no exception.  This will be my 6th time heading to the event and I still find something new each trip.  If you’re looking to register for your first VMworld trip here’s some pointers I have learned from my trips so far.

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