IPv6 Strange Timeouts in established connections

[ceckin]

For the moment i`m using a different ISP from the one i used normally, so i created a new tunnel. And now when i try to download something from address in ipv6 space, i get momentarily timeouts. For example download 10 seconds with 8mbits, the next 2-3 seconds no transfer at all (i.e. 0 kbits), and then the connection resumes back to 8mbits. Can someone tell me is it the tunnel i selected (cause i think i selected Frankfurt)?

btw I tried with more than one address, seems like the whole ipv6 tunnel is time-outing

[ceckin]

Sorry, fixed the problem was my router not properly handling the connections, resulting in a overflow.