Nutanix uses IPv4 multicast for automatic node discovery and cluster expansion.
* Option D (IPv4 multicast must be allowed) is correct:
* When adding new nodes,the Nutanix Cluster automatically detects themusingIPv4 multicast traffic.
* If multicast isblocked at the switch level, the new nodeswill not be discoveredautomatically.
* Option A (Hypervisor version must match) is incorrect:
* While thehypervisor version should be compatible, itdoes not impact node discovery.
* Option B (IPv6 multicast) is incorrect:
* Nutanixdoes not use IPv6 multicast for cluster discovery.
* Option C (AOS version must match) is incorrect:
* Nodes can haveslightly different AOS versions, butdiscovery still works as long as they are compatible.
References:
* Nutanix Best Practices #Cluster Expansion & Auto-Discovery
* Nutanix KB #Why Nutanix Requires IPv4 Multicast for Node Discovery