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ESXi host disconnects with vpxd heartbeat timeout
https://kb.netapp.com/Legacy/NetApp_HCI/OS/ESXi_host_disconnects_with_vpxd_heartbeat_timeout
Applies to NetApp HCI ESXi 6.x, 7.x VMware vCenter Issue ESXi host intermittently disconnects from vCenter and logs "Agent can't send hearbeats: Host is down"

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