A bit OT: Infiniband MAC addresses unique?

I hunted for a suitable group for this post, but I don't see one.
comp.dcom.lans.infiniband doesn't appear to exist, and comp.dcom.lans.misc
seems pretty dead.

Anyway, my question is: I know ethernet MAC addresses are supposed to be
unique (with the exception of Sun hardware that would put the same MAC
address on two NIC's when it knew those NIC's were on different subnets),
but are Infiniband MAC addresses unique too?

Thanks!