The following table lists terms and definitions used in this link aggregation configuration discussion.
Flow Setup Throttling Terms and Definitions
| Term | Definition |
|---|---|
| action | The FST behavior that will occur when a limit threshold is exceeded for an associated port classification. Possible FST actions are: disable, drop, and notification. |
| disable interface | An action that will be applied when an associated limit threshold for this ports configured port classification is reached. The disable interface action operationally disables the interface by placing the interface in a down state. The interface remains in the down state until the associated FST interface status is manually set to operational, the FST feature is disabled, or the device is reset. |
| drop | An action that will be applied when an associated limit threshold for this ports configured port classification is reached. The drop action drops any current or new flows that are in excess of the associated limit threshold. |
| Flow Setup Throttling (FST) | A proactive feature designed to mitigate zero-day threats and Denial of Service (DoS) attacks by defining ports by their placement in the network and setting low- and high-limit flow thresholds that trigger configured notification or flowlimiting actions. |
| Inter-Switch Link (ISL) | A high speed link connecting switches and routers. |
| limit threshold | Specifies the number of flows for the associated port classification that must be reached to trigger a configured FST action. |
| notification | An action that will be applied when an associated limit threshold for this ports configured port classification is reached. The notification action sends out an SNMP trap notification of the exceeded threshold. If the flowlimit threshold is exceeded, a single notification is sent out. The notification action is reset when the number of flows drops below the flowlimit threshold. |
| notification interval | A configured interval that throttles the sending of FST notifications by assuring that the configured period in seconds has expired before the sending of another notification. |
| operational state | An FST interface state that indicates the interface is fully FST operational. A down interface can be manually reset to operational status. |
| port classification | Provides for the configuring of separate limits and actions to different ports based upon the position of the port in the network or a numeric user defined classification. Configurable port types are: user defined (numeric value), single user, multiple user, server, ISL, and unspecified. |
| precedence | The order in which actions will be taken from highest precedence to lowest, when multiple actions are configured. Default precedence is disable and drop. If notification is configured, notification is always sent after any other configured action and takes into account that action in the information provided. |
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