chjatwork,  Short answer is yes, it's supported.  From "docu44518_Isilon-Supportability-and-Compatibility-Guide.pdf". [URL] [IMAGE]
Community,  I was tasked to find out if there will be any issues syncing data between Isilon Clusters.  The source OneFS 7.1.1.4 to new cluster OneFS 7.2.1.4.  Is there any documentation that stats that this will be fine, or if there is a necessary upgrade to the source cluster to OneFS 7.2.1.4 before we start the SyncIQ?  Please let me know and can you back up your answer with documentation?  I need all the ammo I can get so documentation is necessary.    Many thanks in advance,    - Chris
SyncIQ compatibility from OneFS 7.1.1.4 to 7.2.1.4