Hi Jackson, vPC is not supported on FCoE uplink between UCS to N5k or N7k. If vPC’s are desired, you can have separate vPC uplinks for your ethernet traffic and separate FCoE link for your FCoE traffic. Ali 

Hi Jorge, This could be because the OUI of your UCS is not included in the MDS firmware version that is running on your MDS. You can run the command below on your UCS to find the OUI of your Fabric Interconnect: POD10-B(nxos)# show wwn switchSwitch W...