VSphere on John Billekens | Notes from the field

Nested Hypervisor on vSphere

Sun, 08 Jun 2014 08:43:14 +0000

VM Hardware version 9 or Higher VM Advanced settings add:

vhv.enable = “true”
hypervisor.cpuid.v0 = “FALSE” (Hyper-V)

And in vSphere Webclient enable “Expose hardware assisted virtualization to the guest OS” under CPU.

VSA change MAC vSphere 5.1

Sun, 03 Nov 2013 16:03:22 +0000

edit the vmx file /vmfs/volumes/50bf4d82-31b73571-5543-001e4f378eac/MAS # vi MAS.vmx
ensure you are using generated MACs: ethernet0.addressType = “generated” ethernet1.addressType = “generated”
edit these 3 lines to reflect the MAC you want. this assumes you want to use one of the “VMWARE automagic (00:0c:29)” ones, notice the last 6 chars of the first two lines match the last 3 octets of your MAC uuid.location = “56 4d 74 53 f4 52 bf 03-02 fb 39 13 6b 2b 6c fc” uuid.bios = “56 4d 74 53 f4 52 bf 03-02 fb 39 13 6b 2b 6c fc” ethernet0.generatedAddress = “00:0c:29:2b:6c:fc”
if you want ethernet1 to match something specific instead, you need to subtract 10 (0x0A) from the last octet of the ethernet0 MAC because of this line: ethernet1.generatedAddressOffset = “10”
This will create ethernet1’s MAC with a value of 10 more than ethernet0. I didn’t play around with different values here, but presumably you could calculate & edit this number to get both MACs to match your needs.
remove the VM from inventory, and re-import it (by browsing the datastore to the vmx file)
When starting the VM, answer “I moved it” to the dialog box asking about what happened to your machine

vSphere 5.1 static MAC

Sun, 24 Feb 2013 11:47:18 +0000

Failed to start VM
#

After upgrading an ESX cluster from vSphere 5.0 to vSphere 5.1 a VM failed to reboot.. Instead, an error message was issued: Failed to start the virtual machine. Module DevicePowerOn power on failed. Could not set up “macAddress” for ethernet0. Invalid MAC address specified. 00:0C:29:A0:B0:1D is not an allowed static Ethernet address. It conflicts with VMware reserved MACs.

Oversubscription Pros & Cons + how far it should go before it becomes dangerous

Wed, 28 Nov 2012 07:56:06 +0000

Best Practices for Oversubscription of CPU, Memory and Storage in vSphere Virtual Environments Pros and cons of oversubscription and how far it should be taken before it becomes dangerous Scott D. Lowe http://www.vkernel.com/files/docs/white-papers/vsphere-oversubscription-best-practices.pdf vSphere Oversubscription Best Practices