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Quick Tip - How to use Apple Thunderbolt 2 ethernet adapter with ESXi 7.0 or greater

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I was doing some testing on my Apple 2018 Mac Mini with the latest ESXi 7.0 Update 1 release and I needed to setup a separate network connection as the onboard 10GbE was not working for me initially. I was out of ideas but I did remember that I still have my Apple Thunderbolt 2 to gigabit ethernet adapter which was something I had used quite a bit in the early days when I was using the Apple Mac Mini as my homelab system.

Like all recent Apple Mac's, the 2018 Mac Mini only supports Thunderbolt 3 (USB-C) ports and obviously not compatibility with the network adapter. Luckily, I did have an official Apple Thunderbolt 3 to Thunderbolt 2 adapter lying around which would allow me to connect the network adapter to the Mac Mini and to my surprise, it was automatically detected by the latest release of ESXi!


This partially came in a surprise because the Apple network adapter uses the Broadcom tg3 driver and I was not 100% sure if the native Broadcom (ntg3) would automatically claim this device since it was never officially supported.


Its definitely good to know this ethernet adapter still works as long as you have a TB2 to TB3 converter adapter and this should also work for any Intel NUC that have Thunderbolt 3 ports.

Thunderbolt 3 enclosures with (Single, Dual & Quad) M.2 NVMe SSDs for ESXi

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Thunderbolt 3 (TB3) and eventually USB 4 is a really fascinating technology and I believe it still has so much untapped potential, especially when looking at Remote/Branch Office (ROBO), Edge and IoT types of deployments. TB3 was initially limited to Apple-based platforms, but in the last couple of years, adoption has been picking up across a number of PC desktop/laptops including the latest generations of Intel NUCs which are quite popular for vSphere/vSAN/NSX Home Labs. My hope with USB 4 is that in the near future, we will start to see servers with this interface show up in the datacenter 🙂

In the mean time, I have been doing some work with TB3 from a home lab standpoint. Some of you may have noticed my recent work on enabling Thunderbolt 3 to 10GbE for ESXi and it should be no surprise that the next logical step was TB3 storage. Using a Thunderbolt interface to connect to external storage, usually Fibre Channel is something many of our customers have been doing for quite some time. In fact, I have a blog post from a few years back which goes over some of the solutions customers have implemented, the majority use case being Virtualizing MacOS on ESXi for iOS/MacOS development. These solutions were usually not cheap and involved a sizable amount of infrastructure (e.g. storage arrays, network switches, etc) but worked very well for large vSphere/MacOS based environments.

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New Thunderbolt 3 to 10GbE options for ESXi

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With the help from Aquantia, we now have an ESXi driver to enable the built-in 10GbE adaptor for both the Apple 2018 Mac Mini and the iMac Pro. Although this was exciting news for our VMware/Apple customers, I was actually more excited for what this development meant for the larger VMware Community when it comes to 10GbE accessibility.

Many Enterprise customers have already been using Thunderbolt 2/3 to access their 10 Gigabit infrastructure, usually over SFP+ but Ethernet based options also exists such as the Sonnet solution which I had shared last year. This is especially common for VMware customers who virtualize Apple MacOS on vSphere for MacOS/iOS development and the use of Thunderbolt enables ESXi to connect to the underlying storage and networking infrastructure, which traditionally has been either Fibre Channel and/or IP-based storage running over a 10Gig link.

When you start looking at 10GbE accessibility for VMware home labs which could potentially apply to remote office/branch office (ROBO) and Edge/IoT environments, the cost and the complexity of the setup is something that many folks have to consider. There are definitely some creative options out there, most recently Chad Moon shared his solution using a Thunderbolt 3 to PCIe expansion chassis with his Intel NUCs which will run you about $230 per setup or you can be a true hardware hacker like Jack Harvest and use one of the M.2 slots in the Intel Skull Canyon NUC and connect that to PCIe 10GbE SFP+ card with a custom 3D printed chassis to hide everything for just $43.68 🙂

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