The topology view displays the communication link from each secondary node to the coordinator as a line.
Active – solid green line.
Not Responding – dashed orange line.
Timed Out – dotted red line.
Excluded – link contains label “(Excluded).”
Right-click on any link to see a popup menu with a property sheet that provides the state and statistics about the heartbeat and connection pool. See Heartbeat Connections and Pooled Connections.