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  ThunderX: TX failure unless checksum offload disabled

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed

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

  [Test Case]
  Attempt an IPv6 TCP connection:

  $ wget -6 ''

  The connection will time out.

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

  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 

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