Credit loop deadlock detection and recovery in arbitrary topology networks
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United States of America Patent
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Jun 18, 2017
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Jul 14, 2016
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Abstract
A credit loop that produces a deadlock is identified in a network of switches that are interconnected for packet traffic flows therethrough. The identification is carried out by periodically transmitting respective credit loop control messages from the loop-participating switches via their deadlock-suspected egress ports to respective next-hop switches. The CLCMs has switch port-unique identifiers (SPUIDs). The loop is identified when in one of the next-hop switches the SPUID of a received CLCM is equal to the SPUID of a transmitted CLCM thereof. A master switch is selected for resolving the deadlock.
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