Typically, FC HBAs that you use on your ESXi host work correctly with the default configuration settings.
You should follow the configuration guidelines provided by your storage array vendor. During FC HBA setup, consider the following issues.
Do not mix FC HBAs from different vendors in a single host. Having different models of the same HBA is supported, but a single LUN cannot be accessed through two different HBA types, only through the same type.
Ensure that the firmware level on each HBA is the same.
Set the timeout value for detecting a failover. To ensure optimal performance, do not change the default value.
ESXi supports 16 GB end-to-end Fibre Channel connectivity.