For example, for a 02:12:34 locally administered address range, MAC addresses have the form 02:12:34:XX:YY:ZZ. The VMware OUI allocation works with up to 64 vCenter Server instances and is suitable for small scale deployments. To change the vCenter Server ID, configure the vCenter Server unique ID option in the Runtime Settings section from the General settings of the vCenter Server instance and restart it. Where 00:50:56 represents the VMware OUI, XX is calculated as (80 + vCenter Server ID), and YY:ZZ is a random number. According to this scheme, a MAC address has the following format: 00:50:56:XX:YY:ZZ
You can keep using the VMware OUI allocation scheme if your deployment contains a small number of vCenter Server instances. Only virtual machines created or network adapters added after the change receive addresses according to the new scheme.įor information about MAC address allocation schemes and setup, see the vSphere Networking documentation.
VCenter Server instance ID or switching to a different allocation scheme does not resolve MAC address conflicts in existing virtual machines.
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