<div dir="ltr">Therefore I tried running ospf in broadcast mode as well, but then it changed automatically: <div><br></div><div><WARN> myOSPF3: Cannot use interface tun0 as broadcast, forcing ptp<br></div><div><div><br></div></div><div>I tried the tap-Interface and it's working (or at least the neighbours were detected) but as said, my system has to use tun and I cannot change it. So there is propably no solution for such settings. I will try bgp instead. Thank you for your help.</div></div><div class="gmail_extra"><br><div class="gmail_quote">2018-04-03 16:18 GMT+02:00 Ondrej Zajicek <span dir="ltr"><<a href="mailto:santiago@crfreenet.org" target="_blank">santiago@crfreenet.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Tue, Apr 03, 2018 at 08:05:41AM -0600, Michael McConnell wrote:<br>
> OpenVPN won’t do multicast over TUN, only TAP.<br>
<br>
Well, that would be silly from OpenVPN. But tcpdump output from Dawid K<br>
shows that multicast packets are propagated throught TUN:<br>
<span class=""><br>
> 06:59:00.439738 IP (tos 0xc0, ttl 1, id 15270, offset 0, flags [none], proto OSPF (89), length 64)<br>
</span>> server > <a href="http://224.0.0.5" rel="noreferrer" target="_blank">224.0.0.5</a>: OSPFv2, Hello, length 44<br>
<span class="">> Router-ID repo.traffic.local, Backbone Area, Authentication Type: none (0)<br>
> Options [External]<br>
> Hello Timer 10s, Dead Timer 40s, Mask 0.0.0.0, Priority 1<br>
> 06:59:02.449363 IP (tos 0xc0, ttl 1, id 18875, offset 0, flags [none], proto OSPF (89), length 64)<br>
</span>> 10.29.0.6 > <a href="http://224.0.0.5" rel="noreferrer" target="_blank">224.0.0.5</a>: OSPFv2, Hello, length 44<br>
<span class="im HOEnZb">> Router-ID 192.168.21.17, Backbone Area, Authentication Type: none (0)<br>
> Options [External]<br>
> Hello Timer 10s, Dead Timer 40s, Mask 0.0.0.0, Priority 1<br>
<br>
</span><div class="HOEnZb"><div class="h5">--<br>
Elen sila lumenn' omentielvo<br>
<br>
Ondrej 'Santiago' Zajicek (email: <a href="mailto:santiago@crfreenet.org">santiago@crfreenet.org</a>)<br>
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, <a href="http://wwwkeys.pgp.net" rel="noreferrer" target="_blank">wwwkeys.pgp.net</a>)<br>
"To err is human -- to blame it on a computer is even more so."<br>
</div></div></blockquote></div><br></div>