High availability of PCIe devices under multiple processors to provide redundancy
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United States of America Patent
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Jan 29, 2019
Grant Date -
Nov 16, 2017
app pub date -
May 11, 2016
filing date -
May 11, 2016
priority date (Note) -
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Abstract
A method is implemented by a network device to configure the operation of a Peripheral Component Interconnect Express (PCIe) switch to enable an efficient transition from a first active processor in a first root complex to a backup processor in a second root complex. The method involves determining the first active processor in the first root complex and a set of backup processors and a set of root complexes, and configuring each root complex for independent PCIe switch communication. The method further includes detecting a failure of the active processor in the first root complex, selecting and notifying the backup processor and the second root complex to transition to be a second active processor and second root complex, and starting communication with PCIe devices using previously configured independent PCIe switch communication for the second processor of the second root complex.
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