I can't speak for IBM, but there is nothing special in the support for any specific Brocade Fabric OS with SVC or Spectrum Virtualize. You need to comply to the zoning rules of SVC, Storwize or Spectrum Virtualize and then you are good. I you look at the redbooks for instance then there no mention of any specific Fabric OS release concerning Brocade or Cisco SAN switches that I know of.
If you want to go into specifics then check either the SSIC (http://www-03.ibm.com/systems/support/storage/ssic/interoperability.wss) or open a call with IBM supprt.
Stefan Gocke
IBM Certified Advanced Technical Expert (CATE)-Power Systems for AIX v3, ...
IBM Certified Advanced Deployment Professional - Spectrum Storage Mgmt. V6, ...
and many more ...
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