System using vmxnet3 NICs discards some IPv6 traffic and performance is poor

Solution Verified - Updated -

Issue

  • System using vmxnet3 NICs discards some IPv6 traffic and performance is poor
  • IPv6/UDPv6/TCPv6 OS discard counters increase and application misses IPv6 messages

Environment

  • Red Hat Enterprise Linux 7.2 and earlier (kernel-3.10.0-327.el7)
  • Red Hat Enterprise Linux 6.8 and earlier (kernel-2.6.32-642.el6)
  • VMware VM
  • Paravirtualized vmxnet3 network interface

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