#Vmware mac address changes vcenter for mac

The OUI covers 22 bits in a MAC address, in general identifying the vendor (it is actually a bit more complicated than that – but let’s leave it here for now). VMware Organizationally Unique Identifier (OUI) You can find the vCenter Server ID of your current installation in the general settings of the vCenter With the initial setup each vCenter gets a randomly generated ID that allows for 64 different values. Let’s dig into this by starting with the vCenter Server ID. Source: VMware vSphere 6.7 documentation vCenter Server ID VMware Organizationally Unique Identifier (OUI) allocation assigns MAC addresses based on the default VMware OUI 00:50:56 and the vCenter Server ID.

#Vmware mac address changes vcenter for mac

The default behavior for MAC address assignment to virtual machines (or rather network adapters) in vSphere is very well documented and I think everyone has come to know the famous prefix: And even if you are one, think twice and in terms of effort versus gains first. If you have a high number of vCenters there is chance that you might end up with the same MAC addresses across different vCenter instances.īut the TL, DR: Don’t panic if you are not a big enterprise or service provider. As always please do your own research before you put this untested into production. Given, it is somewhat of an edge case for only a hand full of customers and the problem itself is not new but here is my take.

Recently another TAM requested some infos on this topic in VMware’s slack, finally giving me the push to publish as I had this post for ages in my drafts.