How to setup a GRE tunnel to listen to mirror or SPAN traffic from a switch?

Solution Verified - Updated -

Issue

  • How to setup a GRE tunnel to listen to mirror or SPAN traffic from a switch?
  • Network team has setup GRETAP tunnel and is sending traffic monitoring, how do we receive this traffic on RHEL?

Environment

  • Red Hat Enterprise Linux 7 and later
  • GRE tunnel from network switch

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