We have a machine with 3 build NIC, the 3rd isn't used at all, the connector isn't even there. For some reason we can't 
disable it in the BIOS so QNX always sees it, in fact it gets assigned to wm0.  wm1 is the one we use.

With 6.3.2 no problem, but with 6.4.1 even though the wm1 is the NIC used, qnet will not work.  TCP is ok.  Going 
through the log files it appears by default qnet only support 2 interfaces and we need to use num_max_l4s to get qnet to
 work with when there is more then 2 interfaces even though we are not using the 3rd. 

My first reaction is that qnet should have still work at least on the first two NIC, because that means if for some 
reason someone adds a 3rd NIC to a machine already having 2, it will kills qnet.  But then again may it was designed 
that way for a purpose?

What was also very strange is that the other machines would see the name of the machine with 3 NIC appears under /net, 
yet it was unreachable. The machine with 3 NIC would always show an empty /net.