Hi Ondrej, > Do not see any issues on BIRD side. It seems to me that Cisco just resets > the exchange (by sending DBD flag I) when it should be done (or in Loading > state):
I could not find any trace on the XR side, but I'll continue digging. I did actually expect it to be an MTU issue, but could find no proof of that. I also don't understand why OSPFv2 would work, but OSPFv3 would not. > I suppose that this exchage repeats indefinetly and 'show ospf neighbors' > on BIRD also shows the other side in ExStart/Exchange? Actually, the routers show as ExStart/DR and ExStart/BDR, which is also strange. Thank you anyway, if I find anything, I'll share. For the moment, it's back to Quagga. Elmar.
