On 11/1/23 21:28, Sri kor via discuss wrote: > Hii, > Hi Srini,
> At times, when I allocate a VM to a compute node, the network fails to > learn an ARP entry. This issue occurs randomly, making it challenging to > predict when it will happen. I am interested in logging any instances > where the controller sends a Gratuitous ARP (GARP) to better understand > and address this problem.I am not sure ovn-controller is sending the > GARP or not. Is this a known issue? > > When we run into this issue, ovn-controller restart is fixing the problem. > Before v23.09.0 it was expected behavior that only a limited number of gARPs were sent (4 packets with exponential backoff). In v23.09.0 there's a new addition, an ovn-controller external-id that allows users to change this behavior and enable continuous gARPs with an explicit maximum backoff: https://github.com/ovn-org/ovn/commit/0d021216cf43911bb9a7afa8bec90993a3231b0e > Any other hacks work-arounds to fix the problem? > > I don't think there's a way to work around this and you probably need to upgrade to 23.09.0 and set: ovs-vsctl set Open_vSwitch . external_ids:garp-max-timeout-sec=<X-sec> This will make ovn-controller generate gARPs at max X seconds intervals, continuously. > Thanks > > Srini > Thanks, Dumitru _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
