Solars 2.6 on a Sun Ultra 10 (nics??)

I'm running Solaris 2.6 on a Sun Ultra 10. I'm getting ready to put Gauntlet on there and I need more network interfaces. Any idea where I can find a hardware compatability list of some sort for Solars 6? I googled it for about 40 mins, but only found one discussion where the guy asked the same question as I am. But no answer on how to do it, or if it's even compatible with the type of cards I have. I have about 5 different types of cards to work with, so I need to know which will work, as I have to build 7 of these boxes. Any suggestions where to look would be wonderful. Thanks in advance.