We applied this firmware upgrade last night.   The upgrade itself completed successfully, but SP failover did not complete in a timely enough fashion to preclude our XenServer High Availability from kicking in and fencing a few of our servers.  EMC Support reiterated the SP failover (i.e. IP addresses normally assigned to one SP being handled by the other SP when the first SP is being upgraded/rebooted, etc.) was supposed to have happened under the time threshold for which we have set our HA timeout, but our HA logs indicate that was not so.  Consequently, EMC Support collected log files and service information, and promsised to get back to us with the maximum amount of time an SP failover can possibly take, so we can adjust our HA failover timeout accordingly.  Hope that helps others...
The Release Notes indicate this version contains the iSCSI fix that caused the previous 2.1.3 to be pulled.  Has anyone applied this firmware update yet and if so, could you report on the results please?  Thanks!
VNXe 2.1.3.16008 Released - Anyone Apply This Update Yet?