For me this looks just same problem what is on newest release but it if fixed on svn version. This cause that release was on our network totally unusable. Nasty thing on this bug is also that it goes trought network like domino effect, so some times you must restart ~10 routers before you get all loading hangs away.

Try restart both side birds and if it does not help do it on different order. If that helps it is probaply same bug. Try compile new version from svn and if it helps just hope that new release coming soon :) One thing is also that try tcpdump your traffic on both sides and look if you bird try communitace with multicast but tunnel eats it. looks that bird does not order multicast with igmp so some switches can eat that traffic.

2.8.2011 11:44, Ondrej Zajicek kirjoitti:
On Mon, Aug 01, 2011 at 10:57:01PM -0400, Ryan Whelan wrote:
    I'm now having this issue with a new device and its chronic.  It goes into
    'loading' every time bird starts without fail and does not seem to ever
    fully peer.  One end of the tunnel is in 'full', with the other contently
    in 'loading'; no routing information gets exchanged.  I'm not really sure
    how to trouble shoot the issue, I tried removing the security and other
    static protocols to no avail.
If it is a permanent problem, it could be be easily debugged. But in the
past, permanent problems with the same manifestation showed to be some
some different problems, usually with the interface (like mismatching MTUs)

    I have logs and tcpdumps if anyone is interested- assuming this is a bug
    and I'm not doing something wrong.
Could you send me these? For BIRD logs, i would be useful to have logs
with enabled 'debug { events, packets }' for OSPF on both sides.

    The only difference between this PtP link and the others I've setup, is
    this link is a tunnel setup with OpenVPN instead of IPSec.  In the past
    I've used Bird with Quagga over OpenVPN links, so I wouldn't assume thats
    the issue?
Shouldn't be. But OpenVPN is a strange beast, perhaps it has some
strange behavior to packets. One possible change in BIRD is that packets
for PTP ifaces were sent to unicast IP in the past but it was changed to
allrouters-multicast IP (to be consistent with standard). If OpenVPN
have some problems with multicast, that may be the problem.
In that case the solution would be to switch the iface type to PTMP.



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