please see EMC KB (below) for a table of EMC and EMC related products and if they are impacted by the coming LEAP adjustment:

197322 : Product Impacts of Upcoming Leap Second UTC adjustment on June 30th 2015            
https://support.emc.com/kb/197322

Cisco, Brocade are not impacted but it looks like VNX1 (File and Unified) is. Please check the link above for a more detailed list.

Thanks
Allan