On Tue, Oct 09, 2012 at 06:42:36PM +0300, Vitalii Demianets wrote: > Hello, Rodolfo! > > Please, describe your setup: how many devices do you have and how exactly are > they connected? ASCII Art: +------------+ | my machine |----+ +------------+ | | +------------+ | | | | +------------+ +------------+ | | root |----+ <----[A] +------------+ The "Event" is: the ring is opened in [A] > Also, please specify which events exactly are you measuring the time interval > between. As I understand, you are measuring the time interval between some > event X not shown in the logs end the event Y = "br0:mrvl4:0 entering > forwarding state". What is event X? Since I receive the external BPDU related with the Event (see "bridge_bpdu_rcv: ifindex 6, len 60") to the message "MSTP_OUT_set_state: br0:mrvl4:0 entering forwarding". > I guess you have three devices connected in the ring. If so, is the device > under examination NOT the root bridge before event X, or after event X or in > both cases? My device is not the root bridge and it never becomes the root bridge nor before and after the Event. Ciao, Rodolfo -- GNU/Linux Solutions e-mail: giometti@xxxxxxxxxxxx Linux Device Driver giometti@xxxxxxxx Embedded Systems phone: +39 349 2432127 UNIX programming skype: rodolfo.giometti Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it