UDP packets out of order when using multiple TX queues

Solution In Progress - Updated -

Issue

  • We are observing that transmitted datagrams for a single UDP flow are getting out of sequence between the bonded network interface and the active slave interface in that bond. This behavior is observed by running tcpdump on the bond and physical interface at the same time.

Environment

  • Red hat Enterprise Linux
    • kernel-3.10.0-862.25.3.el7
  • Can happen with or without bonding

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