Why "+ipv4.dns-options" is not working as expected in Network Manager?

Solution Verified - Updated -

Issue

  • +ipv4.dns-options does not append in the /etc/resolv.conf file.
  • +ipv4.dns-options overwrites the existing options in the /etc/resolv.conf file.

Environment

  • Red Hat Enterprise Linux (RHEL) 7.
  • Red Hat Enterprise Linux (RHEL) 8.
  • NetworkManager package.

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