Is there a way to change the 5 minute idle timer for NFSv3 mounts?

Solution Verified - Updated -

Issue

  • After five minutes of no activity for a NFSv3 share mounted over TCP, the TCP connection is torn-down.
  • With certain versions of Red Hat Enterprise Linux, we see the NFS client re-use an existing TCP port.
  • This TCP port-reuse behavior sometimes conflicts with stateful firewalls and other network appliances between the NFS client and the NFS server.

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • NFS client

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