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Thanks Sean for detailing the history around this issue. Let us fix the known issue Sean is aware first.
For the record:
(1) At this moment in Rocky, the only deployment scenario I don't see the long ping pause is when VM uses vxLAN and native firewall. Both native OVS and OVS-dpdk are tested, I don't see different behavior between native OVS and OVS-dpdk.
Below are the details observed, consistent and reproducible:
> for VM using vxLAN, long ping delay is only with legacy firewall, and it happens on the direction when the migrating VM goes to a compute that has had its network before. No issue with native firewall.
> for VM using vLAN, long ping delay is with both legacy firewall and native firewall, and it happens on the direction when the migration VM goes to a compute that hasn't had its network before, and the the delay is consistent about 40s.
(2) I am also trying to increase RARP# from 5 to 10 at the QEMU side, and is told the following patch (to be merged, not yet) would allow changing the announce-rounds and the other announce timings at run-time:
http://