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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1402763

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1402763

Title:
  Multicast traffic not propating correctly over linux bridge

Status in linux package in Ubuntu:
  Incomplete
Status in lxc package in Ubuntu:
  Confirmed

Bug description:
  There's a lot of supposition in the title of this bug but its
  currently my best guess.

  In this deployment, I have a number of services running in LXC
  containers across multiple physical hosts; each service is clustered
  across three units, all on separate physical hosts, using corosync and
  pacemaker; when using multicast to support cluster communication, I
  occasionally see a container drop out of the cluster and use its
  isolation response (to shutdown all managed services); when using
  unicast I've not yet see this same problem.

  LXC containers are bridged to the main physical network using a linux
  bridge:

    eth0 <-> juju-br0 <-> vethXXX <-> | vethXXX |

  All MTU's are standard (1500).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: lxc 1.0.6-0ubuntu0.1
  ProcVersionSignature: User Name 3.13.0-40.69-generic 3.13.11.10
  Uname: Linux 3.13.0-40-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  Date: Mon Dec 15 17:20:08 2014
  ProcEnviron:
   TERM=screen-bce
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: lxc
  UpgradeStatus: No upgrade log present (probably fresh install)
  defaults.conf:
   lxc.network.type = veth
   lxc.network.link = lxcbr0
   lxc.network.flags = up
   lxc.network.hwaddr = 00:16:3e:xx:xx:xx

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