An engineer enters a data center to configure an uplink between an I/O Aggregator (IOA) and an upstream switch. The IOA and upstream switch are configured for spanning tree. The engineer applies the following configuration to the uplink port:
interface TenGigabitEthernet 0/12

switchport

flowcontrol rx on tx off

spanning-tree rstp edge-port

As soon as the engineer plugs in the cables, it creates a loop and brings down the network.
Which commands should be entered on the IOA to fix loop?