oc command returns error "the server is currently unable to handle the request"

Solution Verified - Updated -

Issue

  • How to specify different SDN port other than 4789
  • Deployed the OCP cluster in the network which had cisco devices.
  • oc command returns error:
oc get project openshift-apiserver
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get projects.project.openshift.io openshift-apiserver)

Environment

  • OpenShift Container Platform
    • 4.x

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