To ensure high availability for Catalyst Center Global Manager on ESXi, use VMware vSphere high availability (HA) with strict admission control instead of creating three-node clusters.
You cannot create three-node clusters by connecting Catalyst Center Global Manager on ESXi. To enable high availability (HA), use the HA functionality in VMware vSphere. Enable strict admission control to ensure that:
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The system does not power on a virtual machine if that action would violate availability constraints.
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The system enforces configured failover capacity limits.
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HA operates as expected during a failover.