Here my configuration (client):

ifconfig tun0:

tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00

inet addr:10.29.0.10 P-t-P:10.29.0.9 Mask:255.255.255.255

bird_ospf.conf (included in bird.conf) :

protocol ospf myOSPF {

area 0.0.0.0 {

interface "tun0" {

cost 10;

type ptp;

stub no; hello 10; transmit delay 5; wait 10; dead 40;

neighbors {

10.29.0.1;

}; }; };

tcpdump -v -XX proto ospf -i tun0 (confirmation, that hello messages are sent and received) :

12:59:03.143238 IP (tos 0xc0, ttl 1, id 15765, offset 0, flags [none], proto OSPF (89), length 64)

10.29.0.01 > 224.0.0.5: OSPFv2, Hello, length 44

...

12:59:09.157965 IP (tos 0xc0, ttl 1, id 59599, offset 0, flags [none], proto OSPF (89), length 64)

10.29.0.10 > 224.0.0.5: OSPFv2, Hello, length 44

The server is using similar configuration. It differs only by IP(10.29.0.1) and router-ID.

2018-03-29 13:37 GMT+02:00 dawid k <tookie009smieci@gmail.com>:

I'm trying to set up pretty simply configuration consisting of two linux machines connected over tun-interface created by OpenVPN.

The VPN-connection is working fine - I can send data over this interface. Now I installed bird and configured ospf on both devices. I can see that both bird instances are sending hello packets on tun-interface however no one of them is getting the message.

I can see with tcpdump, that every device is getting the hello-message. However they are not forwarded to bird or bird just ignores them.

I tried my setup over cabel with eth0-interface and everything is working fine. Right now every machine is advertising just one example static network. I will focus on correct advertising later after I connect those two instances.

The tun0 interface is working in type ptp and the netmask is 255.255.255.255. Do you have any idea what's wrong?

Thanks for every input, tookie009