High CPU and Lost Packets When Sending Large Amount of Traffic Over OVS

Solution In Progress - Updated -

Issue

  • When sending a large amount of traffic through OVS on RHEL6 the flow table becomes very large (50k+ entries)
  • This leads to very high CPU usage by the OVS process, and lost network traffic

Environment

  • Red Hat Enterprise Linux 6
  • openvswitch-2.1.2-1.el6
  • kernel version older than 2.6.32-452.el6

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