Home > Storage > PowerVault > Guides > Dell PowerVault ME5 Series: VMware vSphere Best Practices > Physical port selection
In a system configured to use all FC or all iSCSI, but where only two ports are needed, use ports 0 and 2 or ports 1 and 3 to ensure better I/O balance on the front end. Ports 0 and 1 share a converged network controller chip, and ports 2 and 3 share a separate converged network controller chip.