title: mongodb showing state as (not reachable/healthy) after adding new secondary in other region
body: <p>I have 3 mongo nodes running in one region which are mapped to the same replica set with 1 primary and others secondary. I have created another standalone mongo in another region. Now I want to add the newly created node as a secondary to the same existing replica set. For that I have executed the rs.add() command in the primary. This will shows the newly added one in rs.config(), But this is showing in not reachable state when rs.status() command executed.</p>
  
  <pre><code>   "state" : 8,
              "stateStr" : "(not reachable/healthy)",
  "lastHeartbeatMessage" : "Connection refused",
              "configVersion" : -1
  </code></pre>
  
  <p>I can connect to the newly created mongo from primary node in existing replica set and on other side, I can connect to the primary node from the newly created mongo machine as well. </p>