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2019/11/18 13:52 1 Comment

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ESXi 5.1 Post Install

After installing or upgrading an host to ESXi 5.1 make sure the following steps are performed:

Configure Syslog

See Configure Syslog on ESXi 5.1 for configuring syslog.

Configure the Guest Clipboard

See this kb article, but it comes down to adding these two lines to /etc/vmware/config file:"FALSE""FALSE"

RDM Settings

If the host will have VMs that participate in MSCS set the perenially reserved option explained in Configure RDMs On ESXi Hosts.

ALUA and RoundRobin

To make sure the host uses optimized paths make sure ALUA is enabled on the host and that all MPP policies are set to round robin. This is explained in ALUA for ESXi 5.1 and NetApp Storage.

NTP Settings

Make sure to set the NTP settings in Configuration → Time Configuration:

  • Set the NTP server
  • Set the Startup policy to start and stop with the host

Increase vSwitch Port Numbers

If you have big hosts who can handle a lot of guests make sure to change the number of ports on the vSwitches to a higher number (for example 248). This is a setting for which ESXi will have to reboot, so:

  • Go to Configuration → Networking
  • Select vSwitch0 and click on properties
  • Edit the vSwitch and set the number of ports to 248
  • Save the settings and reboot the host

Scratch Partition

If your host is running from usb storage you also need a scratch partition for logging purposes, see here.

Increase VMFS Heap Size

If the host will run a large number of VMs increase the size of the VMFS Heap size so the host can handle more then the default of 8 TB on open VMDK disks:

  • Go to the Configuration tab → Advanced Settings.
  • Click VMFS3.
  • Update the field in VMFS3.MaxHeapSizeMB from 80 to 256 MB
  • Reboot the host for the changes to take affect.

The new setting will allow for 25 TB on open VMDK files. If you need more there is a patch available by VMware, see . This patch will allow you to load 60 TB on open VMDK files.


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esxipostinstall.txt · Last modified: 2019/11/18 12:22 (external edit)