Hi Stephen, I have been studying the bridge source & analyzing its flow by putting printks at various places. I am using kernel 2.6.6. I found something really strange happening.. I have setup a bridge with two ports. I havent enabled stp on the bridge. Which I have confirmed by doing a "brctl show" also. However from the printks I find that BPDUs are getting generated & sent on the ports. Isnt this not supposed to happen? Regards, Kishore