This counter tracks associations that completed a graceful shutdown sequence, transitioning to CLOSED from either SHUTDOWN-SENT or SHUTDOWN-ACK-SENT. A healthy pattern has this counter climbing in step with scheduled maintenance or peer-initiated teardowns, so a rise outside those windows needs explaining just as much as a rise in the abort counter does. Seeing this counter increment by exactly the number of signaling links taken down during a scheduled MGC failover confirms that teardown was clean rather than fault-driven.