| 摘要 |
PROBLEM TO BE SOLVED: To provide a method, apparatus, and computer program device enabling a computer network switching device for informing an attached requesting of switch ports affected by configuration changes during the period of time since the last query, by the particular requesting device. SOLUTION: The switching device is initialized with a change index and data vector, the latter indicative of an initial port configuration. The switch increments the index, in response to subsequent port configuration change events, and stores in association with the incremented index a data vector, indicating the ports changed during the corresponding event. The switch stores an array of associated index and vector values. The switch responds to a query from an attached requesting device, by informing the requesting device of specific ports affected by one or more configuration changes, since the index value held by the requesting device was the current index in the switch.
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