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  1. OpenShift Core Networking
  2. CORENET-5383

OVN-Kubernetes LSP up/down for live migration for primary UDN - layer2 topology

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      Create the LSP of the migration target pod with enabled=false.

      Flip this to enabled=true; flip the source pod LSP enabled attribute to false.

      This will be our fallback solution for seamless live-migration in case FDP-770 turns out to be impossible / require further OVN changes / proves too "big" to be accomodated in 4.18.

      This should go into 4.18 to improve migration downtime for both primary / secondary UDNs.

      Successful PoC tracked in https://issues.redhat.com/browse/CNV-48857 

              ralavi@redhat.com Ram Lavi
              sseethar Surya Seetharaman
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