Each secondary node has a communication link to the coordinator, displayed as a line. The label, style and color of the link show internode communication (INC) state:
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”.