My customer is running on ESXI5.5 and looking to upgrade to ESXI6.0. Is there a required upgrade SKU that needs to be purchased to upgrade to 6.0? If so, what is this SKU.
Hi Mike, which vSphere license is used by your customer?
Is it OEM license through Cisco or OLP/Open License through VMware?
With OLP, if you have an active support & subscription services (SnS) you can upgrade license key in My VMware portal without the need to purchase a new license/SKU, see this VMware KB: How to upgrade license keys in My VMware (2006974)
If it is an OEM license, you probably need to check with the OEM Vendor OEM Licensing Help