ospf ptp link sending unicast packets instead of multicast; peer address config not required

[Senthil Kumar Nagappan]

 ptp can be physical or pseudo/virtual connection, it could be over optical/OTN/ethernet/serial/... but these 2 endpoints in the p2p link will see/receive only the packets(all of unicast/multicast/broadcast) originated by the other end of the p2p connection. 
    On Friday, May 7, 2021, 08:20:20 PM GMT+5:30, Joakim Tjernlund <joakim.tjernlund at infinera.com> wrote:  
 
 On Fri, 2021-05-07 at 13:50 +0000, Senthil Kumar Nagappan wrote:
> Yes, there is a switch in between.

hmm, I am not familiar with eth PtoP I/Fs but if you have a switch then the different links
can see each others pkgs (broadcast etc.). Not sure that is a valid use case?

 Jocke

> 
>  On Friday, May 7, 2021, 06:17:28 PM GMT+5:30, Joakim Tjernlund <joakim.tjernlund at infinera.com> wrote: 
> 
> 
> On Fri, 2021-05-07 at 04:53 +0000, Senthil Kumar Nagappan wrote:
> > Hi Joakim,
> > 
> > Thanks for your response.
> > 
> > Will try to elaborate point2 with sample config.
> > 
> > 1. Config at Router R1
> > 
> > lo interface
> > interface loopback lo has ip addr 100.100.100.125 
> > 
> > eth1
> > for unnumbered borrowing the lo address for eth1 and 100.100.100.126 is the peer address
> > ip addr add 100.100.100.125 peer 100.100.100.126 dev eth1
> > 
> > eth2
> > for unnumbered borrowing the lo address for eth2 and 100.100.100.126 is the peer address
> > ip addr add 100.100.100.125 peer 100.100.100.126 dev eth2
> 
> Just to be clear, are those eth I/F directly connected via a cable or is there a switch in between?
> 
> 
>  Jocke
> 

  
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