Used to trigger a load-banlancing in the specified VSAN (Virtual
Storage Area Network).
When the hh3cNpvLoadbalanceVsan is set to a specific VSAN, a
disruptive load-balancing process will be initiated in the VSAN
so that all nodes in the VSAN will re-login to the core switch.
This load-balancing process redistributes downlink traffic across
all uplink interfaces for better load balancing, but it causes
traffic interruption.