Dell Command | Configure Version 3.1 Command Line Interface Reference Guide

This option controls the interrupted assignment of PCI devices in the system. This option is set to standard by default, causing standard interrupt routing that uses INTA, B, C, D for all PCIe devices. When set to distributed, the interrupt routing is rerouted at the MCH root ports to minimize sharing of interrupts across all PCIe (and PCI-X in PIC mode) devices.