SGI TPL (IRIX 6.5: Administrative/NLBS_AG - Chapter 1. Network Load Balancing Software and the Ethernet):
"The Network Load Balancing Software lets you consolidate as many as 40 Ethernet ports into a single IP address, and balance the load on the ports.
This chapter consists of these sections:
“Network Load Balancing Software Features”
“Compatibility"
“Network Load Balancing Driver and System Resources”"