Automatic side selection in double-ring topologies

Details Automatic side selection in double-ring topologies Automatic side selection in double-ring topologies

2008-06-17

2008-06-17

Moe, Aung S. (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative station

C370S258000

Reexamination Certificate

active

07388830

ABSTRACT:
Connecting a new node to a double ring network or establishing a new network having a double ring network is greatly simplified by automatic mapping of logical interfaces to physical interfaces to conform to a mapping or polarity observed by other nodes in the network. A node may discover the network polarity via a message received from an adjacent node and, if necessary, invert the mapping between its two logical interfaces and two physical interfaces. This facilitates installation by relaxing the requirement that the correct media pair be connected to the correct node physical interface. Nodes equipped with this automatic side selection capability may interoperate with nodes that are not so-equipped.

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