We recently purchased new VM hosts, and we're trying to upgrade our current ESX 4.0 environment (3 hosts, running about 15 VMs and VCenter) to the new hosts which are running ESXi 5.0.
Do I need to update my existing hosts to ESXi before I am able to migrate? I'm currently unable to add any of the new hosts to the existing vcenter - vSphere client, probably due to the difference in version.
Any thoughts or starting points? most of the information i've come across so far is for upgrading hosts, but not for migrating to new hosts of a different version. Thanks in advance for any info or links provided.