Daren,
In theory if SFP+ have the same physical/electrical characteristics it should work. We have not qualified any 3rd party SFP's on our N2K's but it might be worth trying. You can run a command on N5K, " service unsupported-transceiver" to help you. But it would be just 1% chance that the SFP would work on N2k. Let us know if that works.
Cheers, amit Singh
Sent from Cisco Technical Support iPad App