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[Slawek Kaplonski <1906318@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

For networks when VLAN transparency is enabled, mtu value returned by get_mtu should be lower by 4 bytes to make space for that additional vlan tag which is added by the VM.
The problem here is that get_mtu() method in the type drivers currently only gets physical_network as parameter so there is no way to check if network has or hasn't got vlan_transparency enabled.

** Affects: neutron
     Importance: Medium
     Assignee: Slawek Kaplonski (slaweq)
         Status: New


** Tags: ml2 vlan

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https://bugs.launchpad.net/bugs/1906318

Title:
  MTU for networks with enabled vlan transparency should be 4 bytes
  lower

Status in neutron:
  New

Bug description:
  For networks when VLAN transparency is enabled, mtu value returned by get_mtu should be lower by 4 bytes to make space for that additional vlan tag which is added by the VM.
  The problem here is that get_mtu() method in the type drivers currently only gets physical_network as parameter so there is no way to check if network has or hasn't got vlan_transparency enabled.

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