Large number of "NET: Registered protocol family 30 31 36" messages

Solution Verified - Updated -

Issue

  • On one of our VMWare guests, after updating VMWare packages we see a large number of following messages in /var/log/messages:
Jul  1 10:33:58 localhost kernel: NET: Registered protocol family 30
Jul  1 10:33:58 localhost kernel: NET: Unregistered protocol family 30
Jul  1 10:33:59 localhost kernel: NET: Registered protocol family 31
Jul  1 10:33:59 localhost kernel: NET: Unregistered protocol family 31
Jul  1 10:34:00 localhost kernel: NET: Registered protocol family 36
Jul  1 10:34:00 localhost kernel: NET: Unregistered protocol family 36
  • Although occurrence of these messages does not impact the host performance, we would like to know what is causing such messages to appear.

Environment

  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7
    • VMWare virtual guest

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