Abstract: The present invention discloses a method, system and mirror driver for detecting duplicated frames in a mirrored data communication network system comprising at least one sender, at least one receiver and at least two data communication networks between the sender and receiver. Each receiver creates and maintains at least one data structure comprising one or more entries, an entry comprising key information for each one of the received data frames. When a data frame is received via a data network, an index to the data structure is computed based on information acquired from the received data frame. If the entry corresponding to the computed index is empty or the entry does not comprise key information matching the key information in the received data frame, key information of the received data frame is stored on the entry and the data frame is forwarded onwards.

Abstract: The present invention discloses a method, system and mirror driver for detecting duplicated frames in a mirrored data communication network system comprising at least one sender, at least one receiver and at least two data communication networks between the sender and receiver. Each receiver creates and maintains at least one data structure comprising one or more entries, an entry comprising key information for each one of the received data frames. When a data frame is received via a data network, an index to the data structure is computed based on information acquired from the received data frame. If the entry corresponding to the computed index is empty or the entry does not comprise key information matching the key information in the received data frame, key information of the received data frame is stored on the entry and the data frame is forwarded onwards.