HyperFlex Upgrade Overview
Cisco HyperFlex System has several components that may be upgraded depending on your environment. The entire HyperFlex cluster and its various components such as Cisco UCS server firmware, the Fabric Interconnects, HX Data Platform software, ESXi hypervisor, can be upgraded while the VMs are in production. This is achieved by performing a rolling upgrade of each node in the HX cluster. However, it's preferable to perform the upgrade during a planned maintenance window with low system load.
The upgrade order for the endpoints depends upon the upgrade path. Refer to the workflow tables to determine the appropriate new deployment or upgrade path.