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[Claudiu Belu <cbelu@xxxxxxxxxxxxxxxxxxxxxx>]

** Also affects: compute-hyperv
   Importance: Undecided
       Status: New

** No longer affects: nova

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https://bugs.launchpad.net/bugs/1644122

Title:
  OVS port fails after hyper-v cluster live migration (Invalid argument)

Status in compute-hyperv:
  New

Bug description:
  Hi Team, I'm using Mitaka cluster driver for Hyper-V with OVS 2.5 Windows port. 
  When I perform live migration, an instance loses network connection but succesfully migrates to another host. 
  There was a bug in Liberty where ovs port had not been migrated to target hosts but now it is seems to be okay, ovs port is on target host but adds with errors.

  vswitchd.log (migration time) https://paste.ubuntu.com/23510786/

  nova-compute.log (migration time) https://paste.ubuntu.com/23510782/

  nova.conf https://paste.ubuntu.com/23510815/

  neutron-ovs-agent.conf https://paste.ubuntu.com/23510816/

  If I execute the command (ovs-vsctl --timeout=120 -- --if-exists del-
  port 4b26fd63-e779-49c9-b419-ac2c53ef8c9a ....) logged in nova
  manually then I get network connection even without restarting the
  services.

  I can also restart hyper-v OVS and network connection becomes
  available.

  I've also logged OVS debug rpc (another try of migration) and it
  contains "protocols":"OpenFlow10","datapath_version":"<unknown>"}

  2016-11-21T13:10:55.017Z|04642|netdevwindows|DBG|construct device
  4b26fd63-e779-49c9-b419-ac2c53ef8c9a, ovstype: 0.
  2016-11-21T13:10:55.017Z|04643|dpif|WARN|system@ovs-system: failed to
  add 4b26fd63-e779-49c9-b419-ac2c53ef8c9a as port: Invalid argument

  Another try: 2016-11-21T12:48:21.789Z|00444|dpif|DBG|system@ovs-
  system: device br-tun is on port 5
  2016-11-21T12:48:21.789Z|00445|netlinksocket|DBG|received NAK error=0
  (No such device)
  2016-11-21T12:48:21.789Z|00446|netdevwindows|DBG|construct device
  4b26fd63-e779-49c9-b419-ac2c53ef8c9a, ovstype: 0.
  2016-11-21T12:48:21.789Z|00447|netlinksocket|DBG|received NAK error=0
  (No such device)
  2016-11-21T12:48:21.789Z|00448|netlink_socket|DBG|received NAK error=0
  (Invalid argument) 2016-11-21T12:48:21.789Z|00449|dpif|WARN|system
  @ovs-system: failed to add 4b26fd63-e779-49c9-b419-ac2c53ef8c9a as
  port: Invalid argument

  https://paste.ubuntu.com/23511010/

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