Hello Guanyao, I don't work for Nicira, but there are some well known scaling issues with the algorithm used by the discovery protocol. I'm hoping that this week I should be able to get around to an improved algorithm that, if you're interested in previewing, I can send you a copy.
- Rob . On Fri, Dec 18, 2009 at 2:44 PM, Martin Casado <cas...@nicira.com> wrote: > Yeah, it could be due to high-loss from load (unfortunately). > > You could try increasing the timeout value in discovery.py. If you don't > have dynamic link events, this should be able to survive temporary timeouts. > > What switches are you using? > >> In my program the discovery module times out links sometimes, causing >> my program not working well. I will debug to find out details why the >> link fails. Actually they are not supposed to fail. Maybe it's because >> of huge data. >> >> On Fri, Dec 18, 2009 at 8:41 AM, Martin Casado <cas...@nicira.com> wrote: >> >>> >>> The goal is to detect link failures, so one would hope that would be the >>> most common failure mode. >>> >>> >>>> >>>> I assume LLDP packets are sent periodically. If there is no LLDP, what >>>> will be the most possible reason? The controller or the switch is too >>>> busy? >>>> >>>> On Thu, Dec 17, 2009 at 3:07 PM, Martin Casado <cas...@nicira.com> >>>> wrote: >>>> >>>> >>>>> >>>>> Discovery times out links when no LLDP packets have been received over >>>>> some >>>>> timeout period. Timer values are documented within discovery.py. >>>>> >>>>> >>>>> >>>>>> >>>>>> It seems this module will periodically construct the topology. I dont >>>>>> know why it will periodically time_out the links. I want to know in >>>>>> what situations the links will time_out. >>>>>> Thanks. >>>>>> >>>>>> _______________________________________________ >>>>>> nox-dev mailing list >>>>>> nox-dev@noxrepo.org >>>>>> http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>> >>> > > > _______________________________________________ > nox-dev mailing list > nox-dev@noxrepo.org > http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org > _______________________________________________ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
