Intermittent TCP connect issues when using tinc 1.0.23 and IPv6

[tomp at tomp.co.uk]

Hi,

Just to follow up on this, after trying the re-keying option set to 
86400, we were still seeing the intermittent tcp timeouts.

However after switching TcpOnly option to on, we have now been having 
reliable communication for 8 hours or so, whereas before we were getting 
timeouts every couple of hours.

Sop hopefully this has solved the problem, and it looks like UDP data 
was being dropped occasionally.

Tom

On 2013-11-28 17:57, tomp at tomp.co.uk wrote:
> OK makes sense.
> 
> How often would you expect to see the REQ_KEY and the PMTU probes 
> occurring?
> 
> They seem to happen quite a lot, is that normal?
> 
> Tom
> 
> On 2013-11-28 15:51, Guus Sliepen wrote:
>> On Thu, Nov 28, 2013 at 02:52:45PM +0000, tomp at tomp.co.uk wrote:
>> 
>>> Now that debugging is turned on properly, I am seeing some
>>> interesting lines:
>>> 2013-11-28 14:48:48 tinc.dcvpn[31620]: Got type 2 MTU probe reply 
>>> 1431 from rps (2001:1b40:5000:9::2 port 655)
>>> 2013-11-28 14:48:48 tinc.dcvpn[31620]: Got type 2 MTU probe reply 
>>> 1431 from rps (2001:1b40:5000:9::2 port 655)
>>> 2013-11-28 14:48:48 tinc.dcvpn[31620]: Got type 2 MTU probe reply 
>>> 1431 from rps (2001:1b40:5000:9::2 port 655)
>>> 2013-11-28 14:48:48 tinc.dcvpn[31620]: rps (2001:1b40:5000:9::2 port 
>>> 655) RTT 0.49 ms, burst bandwidth 51.684 Mbit/s, rx packet loss 
>>> 100.00 %
>>> Specifically the bit about 100% packet loss.
>> Ignore the bit about packet loss, that is an estimate that doesn't 
>> work
>> correctly yet.
>> 
>>> It was shortly after following by:
>>> 2013-11-28 14:51:01 tinc.dcvpn[31620]: Got REQ_KEY from rps 
>>> (2001:1b40:5000:9::2 port 55170): 15 rps rsukmhb 21 AA...
>>> I got a REQ_KEY request 12 times in 1s from rps.
>> That is also normal for tinc 1.1.
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