Hi Kevin,
We have since updated the KB that discusses what versions of the NI-VXI driver for Linux are supported for the different versions of Redhat. Please see the link below:
KB 2GJ9RB00: What Linux Kernel do the Different Versions of NI-VXI Support?
http://digital.ni.com/public.nsf/websearch/9E7C6B018CB2A36286256B28005CE75B?OpenDocument
I have also replied to the email that you sent in on the subject. I will continue our correspondence via your email.
Regards,
Julia Dinolfo
Applications Engineer
National Instruments