Perhaps you might consider a different IPv6 tunnel?



Quoting John D Smerdon (jds@smerdon.livonia.mi.us):
> > Did you do a traceroute6 to see why the IPv6 connectivity is bad?
> > Bugs (also routing bugs) won't get fixed if we don't investigate
> > the problem.
> > 
> > 	rvdp
> 
> I am in Michigan in the US.  I just noticed that sup started to
> take a long time and it was using IPv6.  I did a traceroute6 and
> noticed that my first hop on ipv6 was in Switzerland.  For a chatty
> protocol like sup, sending packets halfway around the world is not
> efficient.