3.8.7.1 Media Disconnect Event
The responder does not take any special action if an interface is disconnected. If the snapshot timer is running, it will continue accumulating for all interfaces. Upon disconnection, interfaces will not have any further changes in counters but the data accumulated before the disconnect MUST be available for aggregation in case a QosCounterSnapshot frame is received with the special FF:FF:FF:FF:FF:FF address in the RealDestinationAddressField.