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[Mike Lowe <1700117@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Post upgrade to Ocata from Newton tap interfaces that used to come up
mtu 9000 now come up mtu 1500.  The settings for global_physnet_mtu and
path_mtu have remained unchanged at 9050.  I no longer have lines like
this in the logs: Running command (rootwrap daemon): ['ip', 'link',
'set', 'tap028da37a-63', 'mtu', '9000'] execute_rootwrap_daemon

The networks in question are reported as mtu 9000 from `openstack
network show`.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1700117

Title:
  Linuxbridge agent in ocata no longer sets mtu for tap interfaces

Status in neutron:
  New

Bug description:
  Post upgrade to Ocata from Newton tap interfaces that used to come up
  mtu 9000 now come up mtu 1500.  The settings for global_physnet_mtu
  and path_mtu have remained unchanged at 9050.  I no longer have lines
  like this in the logs: Running command (rootwrap daemon): ['ip',
  'link', 'set', 'tap028da37a-63', 'mtu', '9000']
  execute_rootwrap_daemon

  The networks in question are reported as mtu 9000 from `openstack
  network show`.

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