Customers might need to connect their Cisco 40GbE Ethernet switch ports to NetApp FAS platforms onboard or optional NICs using a Cisco copper 4x10GbE breakout cable. The authoritative source for cable...Customers might need to connect their Cisco 40GbE Ethernet switch ports to NetApp FAS platforms onboard or optional NICs using a Cisco copper 4x10GbE breakout cable. The authoritative source for cable compatibility information is the NetApp Hardware Universe. NetApp part number X66120-3 or X66120-5 can be used as a cross-reference. Cisco part numbers for QSFP+ to 4xSFP+ copper break-out cables: QSFP-4SFP10G-CU-3M (NetApp Part Number: X66120-3) QSFP-4SFP10G-CU-5M (NetApp Part Number: X66120-5)