It appears that the SFP ports cannot be seen from the N5k which the FEX is connected to. Can the SFP ports on the FEX be used for normal 10Gb data with SFP+ transceivers?
We also have been tracking down 802.1x, switching, virus/work/malware for almost a week now. One of the server guys apparently implemented this and didn't put in a change and denied doing anything when asked..... What a pain!!!