I've learnt that solaris 10 x86 doesn't have HME driver. This driver is used for example for older SUN made ethernet cards, and absence of driver for x86 makes them sparc-only hardware (on solaris 10 OS). Linux have driver for HME cards for ages (./linux-sources/drivers/net/sunhme.c comments dated back to 2000 year), both for x86 and sparc. I wander why SUN doesn't ported it back to x86 architecture. Anyway, currently there's a progress in this direction (not directly to solaris 10) - opensolaris have pushed code authored by "Garrett D'Amore" for hme cards for x86.