Yes, it will forward the BPDUs to the primary switch in the vPC domain.

Hello Scott_22,   In a vPC domain the device in charge of processing and sending BPDUs is the vPC primary, even if the root is the secondary switch, what happens in this scenario is that when the secondary switch in the vPC (the root), receives a BPD...

Seek,   Doing some investigation I found that this is possible but when connecting a FEX to a Nexus 7k, see below:   https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus2000/sw/configuration/guide/rel_6_2/b_Cisco_Nexus_2000_Series_NX-OS_Fa...

Hello Seek,   Regarding to your query, the N2K-C2248TP-E-1GE does not support L3 in the HIF(host interfaces), with the L3 module (L3 ASIC) installed in the 5k, just the 5k interfaces are allowed to be configured with L3, that is a hardware limitation...