<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Ensure the MTU is set correctly on the tunX interfaces. Verify with „ping -M do -s xxxx <peer-address>“ that your tunnels can carry the „promised“ amount of bytes as indicated by interface MTU.<div><br></div><div>😉☝🏻🤓</div><div><br></div><div>Clemens </div><div><br></div><div>PS: xxxx = Interface-MTU -28<br><br><div id="AppleMailSignature">--<div>Von einem Mobiltelefon gesendet. Bitte die Kürze entschuldigen.<br><div>Sent from a mobile phone. Please excuse brevity. </div></div></div><div><br>Am 02.08.2018 um 20:46 schrieb Dawid Kulesza <<a href="mailto:4002225@ba-glauchau.de">4002225@ba-glauchau.de</a>>:<br><br></div><blockquote type="cite"><div>
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<font size="-2">Hello,</font>
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<p style="font-size: 12.8px;"><font size="-2">I have some issues
runinng a few Bird-instances, where two border PC's are
connected over a VPN-Connection. The image below shows the
setting:</font></p>
<p style="font-size: 12.8px; white-space: pre-wrap;"><font size="-2">clientA
192.168.30.2 (eth)
|<i>
</i>|<i>
</i>192.168.30.1 (eth)
routerA
192.168.21.5 (eth)
|<i>
</i>|<i>
</i>192.168.21.1 (eth)
clientB
10.29.0.8 (tun)
|<i>
</i>|<i>
</i>10.29.0.1 (tun)
Server
10.29.0.1 (tun)
|<i>
</i>|<i>
</i>10.29.0.4 (tun)
clientC
192.168.21.17 (eth)
</font></p>
<p><font size="-2"><span style="font-size: 12.8px;">Now running
route -n on ClientC gives following result:</span></font></p>
<p style="white-space:pre-wrap"><font size="-2">route -n (routes with metric 12 are set by bird)
Destination Gateway Genmask Flags Metric Ref Use
Iface
10.29.0.0 0.0.0.0 255.255.252.0 U 0 0 0
tun0
WWWWW 0.0.0.0 255.255.255.252 U 0 0 0 eth1
XXXXXXX 0.0.0.0 255.255.255.255 UH 1024 0 0 eth1
192.168.21.0 10.29.0.8 255.255.255.240 UG 12 0 0 tun0
192.168.21.16 0.0.0.0 255.255.255.240 U 0 0 0 eth0
192.168.30.0 10.29.0.8 255.255.255.240 UG 12 0 0 tun0
On Server:
Ziel Router Genmask Flags Metric Ref Use
Iface
192.168.21.16 10.29.0.4 255.255.255.240 UG 17 0 0 tun0
192.168.21.0 10.29.0.8 255.255.255.240 UG 17 0 0 tun0
192.168.30.0 10.29.0.8 255.255.255.240 UG 17 0 0 tun0
192.168.20.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.29.0.0 0.0.0.0 255.255.252.0 U 0 0 0 tun0
ZZZZZZZZ 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
</font></p>
<p style="font-size: 12.8px;"><font size="-2">With <br>
</font></p>
<p style="white-space:pre-wrap"><font size="-2"><i>birdc show ospf neighbors
</i></font></p>
<p style="font-size: 12.8px;"><font size="-2">I can see on each
router everyone else, so the initialization is done
correctly but somehow data packages aren't transferred
correctly. There are no invalid iptables rules nor any other
firewall is set. <br>
</font></p>
<p style="font-size: 12.8px;"><font size="-2">Regards</font></p>
<div style="color: rgb(136, 136, 136); font-size: 12.8px;" dir="auto">
<p><font size="-2">Dawid</font></p>
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</div>
</div>
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