Cisco ISE VM - assign logical processors

[cnogueral]

The client has installed the ise nodes with VM similar to the 3595 appliance. Due to an inconvenience that arose, it was necessary to review a support bundle and there were some CPU alerts, due to this the recommendation to enable hyperthreading to assign 16 logical processors.
Currently the VMs have 8 CPU and it was confirmed that the VMWare host has Hyperthreading enabled but we do not know how to assign the 16 logical processors.
Sent images of the host configuration with the hyperthreading enabled and the HW configuration of a VM

[Damien Miller]

I don't like how this is laid out in the admin/install guide, you need to assign 16 vCPU regardless if the host has hyperthreading or not. It should not be an issue increasing the VM's from 8 to 16, vCPU is a logical construct and not directly tied to physical CPU count. By this I mean you can over allocated vCPU, a host with 20 cores, can have VM's with a total of 100 vCPU assigned.

The piece that is tied directly to the physical CPU is the CPU reservation, the 16,000 MHz is finite, if you have a CPU with 32,000 MHz available in the host, you assign 16,000 for one VM, there is only 16,000 MHz left. Because esxi also requires/reserves some of this, the host wont be able to start up a second ISE VM with an additional 16,000 MHz reservation.

So shut the VM's down, assign 16 vCPU, and then take a look at "show inventory" on the ISE CLI, you will see 16 cores after which matches the 2.4+ 3595 VM template/licensing.

[cnogueral]

Hello, if i understand well, you mean..  over HW VM configuration where is actually set 8 CPU just have to set 16? It´s correct?

Thanks,

[Damien Miller · Accepted solution]

The correct vCPU count for a v2.4 3595 is 16. When you perform a show inventory from the CLI it should look like this. Earlier templates only provisioned 8v vCPU.  

64 GB and 16 vcpu will match a medium license and the 3595 template.