I/O and Interrupt Resource Allocation
Option ROM and I/O Space Allocation
How to Determine Whether You Need to Allocate Option ROM and I/O Space
How to Configure I/O Space Allocation
How to Identify and Fix Interrupt Resource Shortages
The Oracle Solaris OS is designed to allocate 32 interrupt vectors at priority level six. Because each network device is assigned two interrupts, if the system contains more than 16 network devices the available interrupts at priority level 6 will be exhausted, leaving some devices non-functional.
Note - The Oracle Solaris OS is currently limited to 31 interrupts at priority level six, meaning that it can support only 15 network devices on level six. This will be fixed in a future patch or release.