On Thu, 2021-05-06 at 20:30 +0200, Joakim Tjernlund wrote:
> On Thu, 2021-05-06 at 17:09 +0000, Senthil Kumar Nagappan wrote:
> > Hi,
> > 
> > I did sent this message a week back but I could not see it in the mailing, 
> > moreover just now subscribed to this mailing list, so sending this again.
> > 
> > I’m seeing some issues with ospf adj over ptp numbered/unnumbered 
> > interface. 
> > 
> > 1. For p2p connections, ospf should be sending only multicast packets to 
> > allospfrouters, but I see its sending to unicast address.
> > (From RFC “On physical point-to-point networks, the IP destination is 
> > always set to the address AllSPFRouters”)
> 
> Agreed, I recall fixing the same for Quagga long time ago.
> 
> > 2. For ptp over unnumbered interface, bird requires peer address 
> > configuration which is not required from the ospf perspective. Because bird 
> > is using peer address and sending
> > unicast packets, bird cannot form multiple ospf adj over ptp unnumbered 
> > interface between 2 endpoints using same peer address.
> > Made some quick changes and have attached the patch that addresses the 
> > issues. Relaxed the source ip address validation for ptp link in packet.c 
> > for now. More validation can be
> > added to make it complete.
> 
> I don't quite understand what you are saying here, can you elaborate?
> 

One thing I recall, BIRD OSPF seems to always require dest IP address for its 
routes. For a PtoP I/F
this is optional/not needed so I guess this is a bug in BIRD. Possibly because 
of bug 1)

 Jocke 


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