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[LIU Yulong <yulong@xxxxxxxxxxxxx>]

Public bug reported:

Ovs-agent will lost some flows during restart, for instance, flows to DHCP or L3, tunnel flows. These lost flows can sometimes cause VM failed to boot or dataplane down.
When subnets or security group ports quantity reaches 2000+, this issue can be seen in high probability.

This is a subproblem of bug #1813703, for more information, please see the summary:
https://bugs.launchpad.net/neutron/+bug/1813703

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1813714

Title:
  [L2][scale issue] ovs-agent meet unexpected flow lost

Status in neutron:
  New

Bug description:
  Ovs-agent will lost some flows during restart, for instance, flows to DHCP or L3, tunnel flows. These lost flows can sometimes cause VM failed to boot or dataplane down.
  When subnets or security group ports quantity reaches 2000+, this issue can be seen in high probability.

  This is a subproblem of bug #1813703, for more information, please see the summary:
  https://bugs.launchpad.net/neutron/+bug/1813703

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