Local network, particularly ethernet network having...

H - Electricity – 04 – L

Patent

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Details

H04L 12/413 (2006.01) H04L 1/22 (2006.01) H04L 12/24 (2006.01) H04L 12/26 (2006.01) H04L 12/42 (2006.01) H04L 12/423 (2006.01) H04L 12/437 (2006.01) H04L 29/14 (2006.01)

Patent

CA 2477070

The invention relates to a local network, particularly an Ethernet network having redundancy properties, in which coupling devices (K1, K2, K3) and a redundancy manager (RM) are interconnected in a ring-shaped topology. The redundancy manager opens the ring to create a linear topology if test messages (T11, T12) emitted by said redundancy manager (RM) are received at the other port (P42, P41) within a given period of time, otherwise the redundancy manager (RM) closes the connection. As a so-called redundancy manager observer, at least one of the coupling devices (K3) is configured such that it evaluates messages received at the port (P32) thereof, said port (P32) being connected to the redundancy manager, opens the ring to create a linear topology, and signals an error if more than initial test messages (T11) have been received at said port (P32) and if the status ring opened has been indicated by the redundancy manager (RM) in the last-received initial test message (T11), whereby messages are prevented from circulating on the ring.

L'invention concerne un réseau local, en particulier un réseau Ethernet présentant des propriétés de redondance. Dans ce réseau, des appareils de couplage (K1, K2, K3) et un gestionnaire de redondance (RM) sont interconnectés selon une topologie en anneau. Afin de réaliser une topologie linéaire, ce gestionnaire de redondance ouvre l'anneau, si des messages de test (T11, T12) envoyés par ce gestionnaire sont reçus sur l'autre port respectif (P42, P41) dans un intervalle de temps prédéfini. Sinon, ce gestionnaire ferme la liaison. En tant qu'"observateur de gestionnaire de redondance, au moins un des appareils de couplage (K3) est conçu pour évaluer des messages qu'il reçoit sur son port (P32) relié au gestionnaire de redondance (RM), ouvrir l'anneau pour réaliser une topologie linéaire et signaler une erreur, si davantage de messages que les messages de test initiaux (T11) sont reçus sur ce port (P32) et si l'état "anneau ouvert" est indiqué par le gestionnaire de redondance (RM) dans le dernier message d'essai initial reçu (T11). On évite ainsi que des messages ne circulent sur l'anneau.

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