I've been asked to enable portfast on all ports on our edge switches. I've got a mix of 3Com, Cisco 2950 and 3560 switches, with a majority of them being Dell. I can enable bpduguard on the Cisco equipment, but unfortunately Dell and I don't believe 3Com support anything like that.
My question is more of a general STP question though:
Under what circumstances would create a loop when a non-Cisco switch is connected to a portfast enabled port? Is there something that will guarantee it to go down, or is it like playing roulette? I have a switch on my desk that I enabled portfast on a port, and then I connected my computer to it. I connected another switch to the portfast enabled port, and I didn't have any problems. They want us to enable portfast, but I have the argument that a loop could happen and now they want me to prove it.