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apport-collect 1736593

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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1736593

Title:
  ThunderX: IPv6 TX failure unless checksum offload disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  Most attempts to use IPv6 on the ThunderX NIC will fail.

  [Test Case]
  Attempt an IPv6 TCP connection:

  $ wget -6 'http://www.kernel.org/'

  The connection will time out.

  [Regression Risk]
  The fix is upstream, and is limited to the ThunderX nicvf driver.

  [Workaround]
  Disable TX checksum offload:

  $ ethtool -K eth0 tx off

  [More Details]
  The issue first appears in Linux 4.12.  A fix from Cavium has been merged 
upstream:

  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/ethernet/cavium/thunder/nicvf_queues.c?id=fa6d7cb5d76cf0467c61420fc9238045aedfd379

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