To whom it may concern: for Foundation Lab 1, when I began pasting initial configs on SW1 - SW4 they didn't accept IPv6, so I had to apply "sdm-prefer dual-ipv4-and-ipv6 routing" command and reload each switch. I don't know if this is something Cisco could test knowledge in the exam, but for the rack rentals, I think the switches already should have the template applied so we don't lose time with this procedure.
Thanks in advance.