where the ports require an active SFP+ Passive DAC

Since SFP+ Passive DAC are often used between wo different vendors equipment, most vendors have removed EEPROM lock-out from their equipment. However, a few vendors maintain this lock-out feature. The goal of this technical reference is to provide uidance for understanding the compatibility of Panduit SFP+ Passive DAC Assemblies.
While most equipment vendors currently are pen to third party SFP+ DAC cables, the below table provides awareness of different known compatibility issues with Panduit DAC cable assemblies. The table below will be updated any time prior compatibility issues are resolved or new compatibility issues are discovered. It should be
noted that while most servers are open, compatibility issues can occur with a few CNA server cards (noted below). Additionally some FCoE ports require active copper cables.

Panduit SFP+ 10 Gb/s Active and Passive Cable Assemblies are compatible with any switch or server that
includes MSA compliant SFP+ ports, unless that product requires active cable assemblies or requires a proprietary Compatible Cisco 40GBASE QSFP+ AOC Active Optical Cable, 15 Meters code in the SFP+ Passive DAC assembly. Referring to the table on page 1, the known switches that will not work with Panduit SFP+ DAC cable assemblies are: Cisco Catalyst Series (These can be enabled through the command line interface (CLI)), HP (Procurve switches), and Brocade (8000 FCoE, VDX6730, and Iron series switches). Panduit can provide a custom cable programmed for the VDX6730, please contact Panduit for details.
There are some instances when passive SFP+ cables assemblies will not work, where the ports require an active SFP+ cable assembly.