What's the meaning of "reach" column in ntpq -p and chronyc sources outputs?

Solution In Progress - Updated -

Issue

  • What's the meaning of reach column in ntpq -p and chronyc sources outputs?
  • Should I wait until it is 377 to know if the machine is synchronizing?

Environment

  • Red Hat Enterprise Linux 6, 7, 8, 9
  • ntp
  • chrony

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