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[Bug 1497812] Re: i40e bug: non physical MAC outbound frames appear as copied back inbound (mirrored)


FYI we found these issues while deploying openstack via juju/maas
over a pool of 8 nodes having 4x i40e NICs, where we also found
linux-hwe-generic-trusty (lts-utopic) to be unreliable from its old
i40e driver (0.4.10-k).

Below is a summary of our i40e findings using lts-vivid and lts-utopic
re: successful completed deploys:

#1 3.19.0-28-generic w/stock 1.2.2-k: non-phy mirrored frames (this bug)
#2 3.16.0-49-generic w/stock 0.4.10-k: unreliable deploys
#3 3.19.0-28-generic w/built 2.2.48: OK
#4 3.16.0-49-generic w/built 2.2.48: OK

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  i40e bug: non physical MAC outbound frames appear as copied back
  inbound  (mirrored)

Status in linux-lts-vivid package in Ubuntu:

Bug description:
  Using 3.19.0-28-generic #30~14.04.1-Ubuntu with stock i40e
  driver version 2.2.2-k makes every 'non physical' MAC output
  frame appear as copied back at input, as if the switch was
  doing frame 'mirroring' (and/or hair-pinning).

  FYI same setup, with i40e upgraded to 1.2.48 from
  behaves OK, fyi also we did a port mirroring setup at
  the switch directed to a different physical port for debugging,
  and didn't observe these frames to be physically present.

  See tcpdump -P in/out and more details at

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.19.0-28-generic 3.19.0-28.30~14.04.1
  ProcVersionSignature: Ubuntu 3.19.0-28.30~14.04.1-generic 3.19.8-ckt5
  Uname: Linux 3.19.0-28-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.13
  Architecture: amd64
  Date: Mon Sep 21 02:05:28 2015
   PATH=(custom, no user)
  SourcePackage: linux-lts-vivid
  UpgradeStatus: No upgrade log present (probably fresh install)

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