Depending on how you’ll connect a storage device to the host, you should have a server with at least two network cards: the first one for the management network and the second one for the storage network. I assume that you’re using either shared storage such as iSCSI storage array or network attached storage (NAS).
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Log in to the system first. You’ll need to be at the console.
Check the network cards that the installer recognizes. Sometimes when you’re installing on non-certified hardware, the installer may have problems recognizing some network cards, so be aware of that.
Hit Enter to go one level deeper and see the network adapters, VLAN settings and the other network configuration options.
The next submenu allows you to connect or disconnect the network adapters you wish to use.
Let’s hit the Esc key to go back and configure our network settings.
Hit the Enter key to validate the selection. This will return us to the previous menu, one level higher. Use the arrow key to go down one step and disable the IPv6 configuration completely. Use the up arrow and Space keys to uncheck the selection.
Quick note: You should create your forward and reverse DNS records on your DNS server before configuring the DNS here.
Hit Enter once more. We’re almost done.
Enter any suffixes required for your DNS. You’ll get a prompt to reboot, which will validate the configuration. Note that there is only single reboot necessary! And this is only because we disabled the IPv6 configuration. This means that if you left the IPv6 in place, you wouldn’t need to reboot ESXi 6.5, not even once.