is you mean Storage interface port?

actually we need minimally 4 ports,
1. for Management interface
2. for vxLAN / over lay interface
3. for Storage interface
4. for Edge

highly recommend use 10Gbe port for vxLAN and Storage interface

if you want use aggregation link, so you has to have more than 4 ports. what I do before I always set aggregation link for storage interface, and both of them using 10 gbe port