Broadcast-Storm

[Markus Dangl]

Hi,

I've got a small tinc network (switched) set up and it usually works
fine. But sometimes i get echos from my own broadcasts and sometimes
this even leads to a broadcast storm (two nodes forwarding the
broadcasts in circle, thus flooding the whole network with copies of the
same packet).

I'm currently unsure on how to debug this using tinc. So my questions are:
 - How does tinc handle broadcasts when in switching mode? Does tinc
understand STP? (I usually enable STP on all my linux bridges).
 - Not all of the clients update their tinc clients regularly, so i
might have several tinc versions from 1.0.9 to 1.0.12 in my net. Could
it be that incompatibilities between these versions are responsible for
this?

B.t.w.:

Sadly not all of the installations are maintained by people that
actually know a lot about network stuff. Also, a lot of the nodes run on
Windows :/ so i don't have a portable way to use packet filtering on all
nodes.

A nice-to-have feature for tinc would be to have some filtering options,
maybe even a real packet filter (like those *-tables tools on linux). I
see that that's not really tincs job, but there currently is no portable
way of packet filtering, but tinc could do it :)
If there are more people that could make good use of such a feature i
might just start experimenting a little with the tinc sources.

With kind regards,
Markus Dangl