Sarah -
NetApp has supported ISCSI and been in full RFC compliance for many years.
I have to beg the follow up question - what part of the RFC did you think wasn't supported ?
It would help if your question was more specific ...
I hope this response has been helpful to you.
At your service, Eugene E. Kashpureff, Sr.
Independent NetApp Consultant http://www.linkedin.com/in/eugenekashpureff
Senior NetApp Instructor, IT Learning Solutions http://sg.itls.asia/netapp
(P.S. I appreciate 'kudos' on any helpful posts.)