very high traffic without any load

[Christopher Klinge]

Hi everyone,
 
I am new to using tinc and currently trying to set up a full IPv6 mesh between 4 servers of mine. Setting it up went smoothly and all of the tinc clients do connect properly. Routing through the network works fine as well. There is however a large amount of management traffic which I assume should not be the case.
 
Here is a quick snapshot using "tinc -n netname top" showing cumulative values:
 

Tinc sites             Nodes:    4  Sort: name        Cumulative
Node                IN pkts   IN bytes   OUT pkts  OUT bytes
node01             98749248 67445198848   98746920 67443404800
node02             37877112 25869768704   37878860 25870893056
node03             34607168 23636463616   34608260 23637114880
node04             26262640 17937174528   26262956 17937287168
 
 
That's 67GB for node01 in approximately 1.5 hours. Needless to say, this kind of traffic is entirely prohibiting me from using tinc. I have read a few messages in this mailing list, but the only thing I could find were traffic spikes, likely caused by other systems using the same devices as tinc or by the tinc daemon running for too long. The later does not apply, as the entire network was up for an hour and a half only. Additionally I do not think the first one applies, as all of my machines use entirely fresh tun/tap devices when running the network. The problem appeared even after a fresh restart with not other noteworthy processes running besides tinc.
 
Any help would be appreciated.
 
Kind regards
Christopher