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[Vladimir Eremin <veremin@xxxxxxxxxxxx>]

Public bug reported:

We're using [ml2]/physical_network_mtus to specify mappings like this
one:

    [ml2]
    physical_network_mtus = physnet1:1500,physnet2:1500

In this try/except
https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/helpers.py#L37:

        try:
            self.physnet_mtus = utils.parse_mappings(
                cfg.CONF.ml2.physical_network_mtus
            )
        except Exception:
            self.physnet_mtus = []

if you specify the option above, neutron.common.utils.parse_mappings
fails with:

    ValueError: Value 1500 in mapping: 'physnet2:1500' not unique

That's because you need to call neutron.common.utils.parse_mappings with
unique_values=False

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1567502

Title:
  [ml2]/physical_network_mtus impoperly handled

Status in neutron:
  New

Bug description:
  We're using [ml2]/physical_network_mtus to specify mappings like this
  one:

      [ml2]
      physical_network_mtus = physnet1:1500,physnet2:1500

  In this try/except
  https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/helpers.py#L37:

          try:
              self.physnet_mtus = utils.parse_mappings(
                  cfg.CONF.ml2.physical_network_mtus
              )
          except Exception:
              self.physnet_mtus = []

  if you specify the option above, neutron.common.utils.parse_mappings
  fails with:

      ValueError: Value 1500 in mapping: 'physnet2:1500' not unique

  That's because you need to call neutron.common.utils.parse_mappings
  with unique_values=False

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