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Concurrent fault detection for a multiple-plane packet switch

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3 Author(s)
R. Rojas-Cessa ; Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA ; E. Oki ; H. J. Chao

In high-speed and high-capacity packet switches, system reliability is critical to avoid loss of huge amounts of information and retransmission of traffic. We propose a series of concurrent fault-detection mechanisms for a multiple-plane crossbar-based packet switch. Our switch model, called the m+z model, has m active planes and z spare planes. This switch has distributed arbiters on each plane. The spare planes, used for substitution of faulty active ones, are also used in the fault-detection mechanism, thus providing fault detection and fault location for all switching planes. Our detection schemes are able to detect a single fault quickly without increasing transmission overhead. The proposed schemes can be used for switches with different numbers of active planes and a small number of spare planes.

Published in:

IEEE/ACM Transactions on Networking  (Volume:11 ,  Issue: 4 )