I am playing with bpduguard/bpdu filter on a 2950 switch. I start off by first trying to create a loop. I enable portfast on FA0/1 and FA0/2 and plug a cable from fa0/1 to fa0/2 then do a show span. fa0/1 is FWD and fa0/2 is BLK.. Can anyone explain why STP is working if i am enableing portfast. No bpduguard of bpdufilter configs have been applied yet. This is a stand alone switch. Not connected to anything else.