Credit loop deadlock detection and recovery in arbitrary topology networks
US10630590B2 · kind B2 · utility
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Key dates
| Filing date | Jun 18, 2017 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Aug 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/524
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.