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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

** Changed in: neutron
    Milestone: None => liberty-3

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https://bugs.launchpad.net/bugs/1482554

Title:
  skip setting up firewall filters for ports not attached to any
  security groups

Status in neutron:
  Fix Released

Bug description:
  Not all neutron ports have security groups attached to them.
  In OVS Neutron agent, when we try to process a newly discovered port (be it a compute or network), we get the port details from the server and then try to apply the firewall filters. 

  But typically for network (DHCP and L3) ports, we do not have any
  security groups associated. We can actually skip the
  setup_port_filters for these ports, which can help us save RPC
  bandwidth and server processing time.

  In scaled environments, any resync in L2 agent which is serving huge
  number of DHCP ports, is taking longer time because of this
  unnecessary workflow. Same thing applies to agent restart scenario as
  well.

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