Actually, I have NetVista 4 IBM personal Computers with Linux OS Red Hat 8, my research requires installing an extra three Ethernet PCI cards on each machine and I've installed those cards on my boxes. But I have a problem that all the new NIC cards are sharing the same IRQ Number. I have been searching to solve this problem but unfortunately I coudn't find anything useful . Could you please help me to solve this problem? Thanks so much in advance for your reply and I appreciate your help. Regards Al-Gharribeh Muhammad