Should I configure my RHEL High Availability cluster nodes to access their fence devices over the same network interface as the cluster uses for communication or a separate network interface?

Solution Verified - Updated -

Issue

  • Which interface is best to use for cluster fence devices? The private cluster interconnect, or the public network?
  • Our organization has fence devices on a separate restricted network, and we can't move those connections over to our private cluster network. Will this work with the cluster software?
  • Are there advantages and disadvantages to splitting fence devices off to a separate network interface from the cluster?

Environment

  • Red Hat Enterprise Linux (RHEL) 5, 6, or 7 with the High Availability Add On
  • All fence devices in the cluster require a network connection in order to succeed

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