This very likely has nothing to do with host_tracker at all and the real problem is that you are running a forwarding component that's not prepared to deal with loops.
See the other pox-dev thread from today involving loops, and/or check out the loop question in the FAQ. -- Murphy On Sep 11, 2013, at 11:50 AM, adria sole <adrias...@gmail.com> wrote: > Hi all, > > I have seen that in a topology where there are loops when I connect a host to > a router I get flooded of Possible duplicate host... Is this fixed in any > version of host_tracker.py? > > Thank you in advance >