Inter-ring protection for shared packet rings

Details Inter-ring protection for shared packet rings Inter-ring protection for shared packet rings

2003-05-15

2009-10-13

Harper, Kevin C (Department: 2416)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S222000, C370S405000

Reexamination Certificate

active

07602706

ABSTRACT:
A method for providing inter-ring protection in shared packet rings includes identifying an active node which is connected to a ring interconnect node on the same ring as the active node and connected to a peer node on a different ring with a ring interconnecting link. When the active node is in active mode and receives notification of a failure of the ring interconnecting link or peer node, the active node sends a message to the ring interconnect node so that the ring interconnect node switches from standby mode to active mode. The active node is then changed to standby mode.

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