Explanation
Ref:https://www.vvlsystems.com/wp-content/uploads/2016/11/BP-2009_Metro_Availability.pdf

The customer's requirements for automatic failover and resource balancing in a new Hyper-V cluster can be met with the use of Failover Clustering and High Availability. Failover Clustering allows VMs to automatically failover to another host in the event of a host failure, fulfilling the requirement for resilience.
High Availability ensures that VMs restart on available hardware in the cluster, maintaining service continuity and balancing CPU and memory resources across the hosts.References: Microsoft Hyper-V documentation, Nutanix Bible, and NCS-Core 6.8 course materials on virtualization platforms.

Given the reported RX errors on eth2 and the intermittent ping loss as observed from the CVM logs, the best initial troubleshooting step that avoids VM disruption is to inspect the switch port for errors. Option C, "Check the port on the switch side for any errors," is the most direct and non-invasive approach to determining if the issue lies with the network infrastructure rather than the server hardware itself or the configuration.
This action helps identify whether the problem is related to the physical connection (e.g., port issues, switch configuration errors) without altering the current active network setup on the Nutanix node. If errors are found on the switch port, adjustments or repairs can be made accordingly, potentially resolving the RX errors without impacting the running VMs.
References:This recommendation follows Nutanix's best practices for network troubleshooting, focusing first on external network components before altering host configurations.