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[Launchpad Bug Tracker <1928299@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1928299

Title:
  centos7 train vm live migration stops network on vm for some minutes

Status in neutron:
  Expired
Status in neutron train series:
  Expired

Bug description:
  Hello, I have upgraded my centos 7 openstack installation from Stein to Train.
  On train I am facing an issue with live migration:
  when a vm is migrated from one kvm node to another, it stops to respond to ping requests from some minutes.
  I had the same issue on Stein and I resolved it with a workaround suggest by Sean Mooney where legacy port binding was used. 

  On train seems there aren't backported patches to solve the issue.

  I enabled debug option on neutron and here there is the dhcp-agent.log from the exact time when the live migration started:
  http://paste.openstack.org/show/805325/

  Here there is the openvswitch-agent log from the source kvm node:

  http://paste.openstack.org/show/805327/

  Here there is the openvswich agent log from the destination kvm node:

  http://paste.openstack.org/show/805329/

  
  I am using openvswitch mechanism driver and iptables_hybrid firewall driver.

  Please any help will be appreciated 
  Ignazio

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