Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

Interfaces forward frames by default until they receive a BPDU that indicates that they should behave otherwise; they do not go through the Learning and Listening states. The bpduguard shutdown-on-violation option causes the interface hardware to be shut down when it receives a BPDU. When you only implement bpduguard, although the interface is placed in an Error Disabled state when receiving the BPDU, the physical interface remains up and spanning-tree drops packets in the hardware after a BPDU violation. BPDUs are dropped in the software after receiving the BPDU violation.

PDU Filtering enabled on an interface stops sending and receiving BPDUs on the port fast enabled ports. When you enable BPDU guard and BPDU filter on the port, then BPDU filter takes the highest precedence. By default BPDU filtering on an interface is disabled.

To enable PortFast on an interface, use the following command.

Dell#(conf-if-te-1/1)#show conf
                                 !
                                 interface Tengigabitethernet 1/1
                                 no ip address
                                 switchport
                                 
                                 spanning-tree 0 portfast
                                 no shutdown
                                 Dell#(conf-if-te-1/1)#