What are the ramifications of changing the net.ipv4.tcp_keepalive_time value to a higher or lower value?

Solution Verified - Updated -

Issue

  • Are there any ramifications of changing the value in net.ipv4.tcp_keepalive_time to a higher or lower value?
  • Can I make this change on the fly?  If yes, then how?
  • What are the steps on making this change permanent?

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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