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<div class="moz-cite-prefix"><tt>After change the mtu and
reestablishing the VPN-Tunnel, all works fine.<br>
So OLSR relied on this settings.<br>
Thanks a lot!<br>
<br>
<blockquote type="cite"> ~ # ip addr show dev tap107<br>
179: tap107: <BROADCAST,UP,LOWER_UP> mtu 1420 qdisc
pfifo_fast state UNKNOWN qlen 500<br>
link/ether ca:5c:f1:0d:c7:a7 brd ff:ff:ff:ff:ff:ff<br>
inet 91.205.xxx.xxx/32 brd 255.255.255.255 scope global
tap107<br>
inet6 fe80::c85c:f1ff:fe0d:c7a7/64 scope link<br>
valid_lft forever preferred_lft forever</blockquote>
<br>
<br>
</tt>
<pre class="moz-signature" cols="72">Liebe Grüße aus Freilassing,
Michael Rack
RSM Freilassing
--
RSM Freilassing Tel.: +49 8654 607110
Nocksteinstr. 13 Fax.: +49 8654 670438
D-83395 Freilassing <a class="moz-txt-link-abbreviated" href="http://www.rsm-freilassing.de">www.rsm-freilassing.de</a> </pre>
Am 12.08.2012 14:06, schrieb Michael Rack:<br>
</div>
<blockquote cite="mid:50279C43.1020700@rsm-freilassing.de"
type="cite">
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<div class="moz-cite-prefix"><tt>All right! That figures :)<br>
<br>
So i try to adjust the vpn-interface mtu settings. I hope OLSR
splits messages, that gets bigger then the maximum mtu / mss.<br>
<br>
Currently i use OLSR v0.6.2.<br>
<br>
<blockquote type="cite">DebugLevel 0<br>
IpVersion 4<br>
FIBMetric "flat"<br>
ClearScreen yes<br>
<br>
RtTable 100<br>
RtTableDefault 253<br>
<br>
AllowNoInt yes<br>
TosValue 16<br>
<br>
Willingness 3<br>
LinkQualityLevel 2<br>
LinkQualityAlgorithm "etx_ff"<br>
<br>
UseHysteresis no<br>
Pollrate 0.05<br>
NicChgsPollInt 3.0<br>
<br>
TcRedundancy 2<br>
MprCoverage 1<br>
<br>
InterfaceDefaults<br>
{<br>
...<br>
}<br>
</blockquote>
<br>
</tt>
<pre class="moz-signature" cols="72">Liebe Grüße aus Freilassing,
Michael Rack
RSM Freilassing
--
RSM Freilassing Tel.: +49 8654 607110
Nocksteinstr. 13 Fax.: +49 8654 670438
D-83395 Freilassing <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="http://www.rsm-freilassing.de">www.rsm-freilassing.de</a> </pre>
Am 12.08.2012 01:09, schrieb Song Gao:<br>
</div>
<blockquote
cite="mid:CAKeNtnTWiiyUq2gXicuMDuBQwHAmS5Y5XjnCEULm5kzPcv_rhQ@mail.gmail.com"
type="cite">
<div>Hey Michael,</div>
<div><br>
</div>
I am probably not the best person to answer this but from my
understanding, OLSRd uses MTU of the interface to decide packet
size. The interface created by VPN tunnel should be setting
proper MTU.
<div> <br>
</div>
<div>Could you post your OLSRd config file as well as the
version of OLSRd you are using?<br clear="all">
<div><br>
</div>
<div><br>
</div>
<div>Kind regards,</div>
-- <br>
Song Gao<br>
<div><a moz-do-not-send="true"
href="https://profiles.google.com/song.gao.beta/about"
target="_blank">https://profiles.google.com/song.gao.beta/about</a></div>
<br>
<br>
<br>
<div class="gmail_quote">On Sat, Aug 11, 2012 at 3:49 PM,
Michael Rack <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:michael.rack@rsm-freilassing.de"
target="_blank">michael.rack@rsm-freilassing.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi
OLSR-Users!<br>
<br>
I have a VPN-Tunnel that runs over a PPPoE-Link, so i have
only 1492 Bytes available. The VPN-Tunnel is established
via UDP, so i have 8 Bytes (MAC), and 12 Bytes (UDP)
overhead. So the remaining MTU is 1472 Bytes for the inner
Layer-2.<br>
<br>
So there are 1452 Bytes left for OLSR.<br>
<br>
But OLSR currently send out packets with more then 1452
Bytes, so the VPN-Tunnel goes down and automatically get
reestablished.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"> Aug
11 21:18:50 vtund[6598]: Session
neubichl-dsl-backup[79.192.xxx.xxx:46105] opened<br>
Aug 11 21:18:50 vtund[6598]: UDP connection initialized<br>
Aug 11 21:19:29 vtund[6598]: Message too long (90)<br>
Aug 11 21:19:29 vtund[6598]: Session neubichl-dsl-backup
closed<br>
</blockquote>
<br>
currently i drop packages over 1420 bytes that are passing
the DSL-Interface:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
iptables -A OUTPUT -o tap107 -m length --length 1420: -j
DROP<br>
</blockquote>
<br>
since that, the VPN-Tunnel is stable.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"> ~ #
ip route show table olsr-network | wc -l<br>
84<br>
</blockquote>
<br>
currently there are 84 routes spreaded over the whole
network via OLSR. That can not result in a so high package
size? How can i reduce the packet-size, or what have to be
done, so olsr does not eat up more then 1400 Bytes?<br>
<br>
<br>
Liebe Grüße aus Freilassing,<br>
<br>
Michael Rack<br>
RSM Freilassing<span class="HOEnZb"><font color="#888888"><br>
-- <br>
RSM Freilassing Tel.: <a
moz-do-not-send="true"
href="tel:%2B49%208654%20607110"
value="+498654607110" target="_blank">+49 8654
607110</a><br>
Nocksteinstr. 13 Fax.: <a
moz-do-not-send="true"
href="tel:%2B49%208654%20670438"
value="+498654670438" target="_blank">+49 8654
670438</a><br>
D-83395 Freilassing <a
moz-do-not-send="true"
href="http://www.rsm-freilassing.de" target="_blank">www.rsm-freilassing.de</a><br>
<br>
<br>
-- <br>
Olsr-users mailing list<br>
<a moz-do-not-send="true"
href="mailto:Olsr-users@lists.olsr.org"
target="_blank">Olsr-users@lists.olsr.org</a><br>
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href="https://lists.olsr.org/mailman/listinfo/olsr-users"
target="_blank">https://lists.olsr.org/mailman/listinfo/olsr-users</a><br>
</font></span></blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</blockquote>
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