I want to perform layer 1 testing using a bit error rate test set through the 3750-E 10Gig ports. Seeing that I have only one test port, I must place a loopback somewhere in the path beyond the 3750. I would like to turn off flap detection and increase the throughput through the switch. My question is, is it possible to turn off spannig-tree and flap detection in the 3750 or do I have to buy a second test set? Thanks