Testing a communications network for duplicate station...

H - Electricity – 04 – L

Patent

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H04L 1/00 (2006.01) G06F 11/00 (2006.01) H04L 12/24 (2006.01) H04L 12/437 (2006.01)

Patent

CA 2047321

An apparatus to detect stations having duplicate addresses, the stations being of the type connected in a computer communications network uses a neighbor response test and a transmit self test using time out; a neighbor response test for setting a neighbor indicator to timeout in the event that a timeout occurs, and for setting the neighbor indicator to pass in the event that a received response frame indicates no destination address match, and for setting the neighbor indicator to fail in the event that a received response frame indicates that a destination address match occurred; a duplicate address indicator responsive to the neighbor response test and the transmit self test sets the indicator in one of three different states, duplicate address present, absent, and unknown.

Appareil pour détecter des stations à adresse dédoublée dans un réseau de télématique. L'appareil utilise un test de réponse de station voisine et un test automatique de transmission utilisant la temporisation. Un test de réponse de station voisine met un indicateur de station voisine en position de temporisation s'il y a temporisation, en position réussite si une trame de réponse reçue n'indique pas concordance d'adresses de destination, et en position échec si une trame de réponse reçue indique une concordance d'adresses de destination. Un indicateur d'adresses dédoublées sensible au test de réponse de station voisine et au test automatique de transmission règle l'indicateur à l'un des trois états suivants : présence d'adresse dédoublée, absence d'adresse dédoublée et état inconnu.

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