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[Eric Desrochers <eric.desrochers@xxxxxxxxxxxxx>]

I believe this upstream commit have some good chance to fix the problem.

i40e: Fix a port VLAN configuration bug

If a port VLAN is set for a given virtual function (VF) before the VF
driver is loaded then a configuration error results in which the port
VLAN is ignored when the VF driver is subsequently loaded. This causes
the VF's MAC/VLAN filters to not use the correct VLAN filter. This
patch ensures that the port VLAN filter is considered at the right time
during configuration of the VF's MAC/VLAN filters. 

I have a patch but need testers before submit the patch to the Ubuntu
Kernel Team.

If you have i40e cards and willing to test, please let me know.

Eric


** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1594884

Title:
  Port VLAN configuration bug in i40e driver

Status in linux package in Ubuntu:
  New

Bug description:
  It has been brought to my attention :

  "Contrail deployment requires Trusty kernel 3.13.X

  kernel 3.13.X has an older version of the driver, which disregards
  packets with vlan ids.

  This driver work as expect in Kernel 4.4.X (Xenial) but not 3.13.X
  (Trusty).

  This is a blocker as we cannot deploy contrail on 4.4.x and if we
  downgrade to kernel 3.13.x the driver is missing. "

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