Problem with lost packets

[Dariusz Bajszczak]

W dniu 2013-09-06 22:34, Guus Sliepen pisze:
> On Fri, Sep 06, 2013 at 01:03:56PM +0200, Dariusz Bajszczak wrote:
>
>>      I have problem with lost packets in tinc connection. I have tinc VPN with about 60 nodes (central node with tinc 1.0.20 and 59 nodes with tinc 1.0.9 connecting with central). Everything works fine except 2 nodes. In this nodes I observed about 90 % packet loss in connection to central. In the logs (debug level 5) I don't see any errors. I tested connection with iperf (server in central node). When I use iperf over tinc, 90% packet is lost (10 kbits/s speed), without tinc (with the same protocols and ports, udp and tcp port 654) everything is ok (4 Mbit/s). All nodes have the same version of tinc, identical configuration (except ip address) and firewall. I need help.
> Did you check the logs of the central node AND of the two problematic nodes? Is
> there anything different about those two nodes than the 57 other 1.0.9 nodes?
> If those things don't give you any answers, could you send me the tinc.conf of
> the central node and the two problem nodes, their host config files, and the
> contents of tinc-up on those three nodes? That would give us a better idea of
> your configuration.
>
>
>
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Hello,

     In logs everything looks normal. Problem is only with transfer from 
node to central. From central to node everything is ok, full speed. 
Files in attachment. Below, iperf logs.

Server listening on UDP port 654
Receiving 1470 byte datagrams
UDP buffer size:   122 KByte (default)
------------------------------------------------------------
[  3] local 10.10.10.1 port 654 connected with 10.10.56.1 port 60925
[ ID] Interval       Transfer     Bandwidth       Jitter Lost/Total 
Datagrams
[  3]  0.0-20.2 sec  12.9 KBytes  5.23 Kbits/sec  15.733 ms 6793/ 6802 
(1e+02%)
[  4] local x.x.x.x port 654 connected with y.y.y.y port 55194
[  4]  0.0-20.0 sec  9.54 MBytes  4.00 Mbits/sec  1.606 ms    0/ 6802 (0%)

Best regards,
Darek

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