The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2015
Filed:
Jun. 20, 2012
Ronald E. Freking, Rochester, MN (US);
Elizabeth A. Mcglone, Rochester, MN (US);
Daniel R. Spach, Pittsboro, NC (US);
Curtis C. Wollbrink, Rochester, MN (US);
Ronald E. Freking, Rochester, MN (US);
Elizabeth A. McGlone, Rochester, MN (US);
Daniel R. Spach, Pittsboro, NC (US);
Curtis C. Wollbrink, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The standard hot-plug controller (SHPC) specification may be used to generate PCI messages in a distributed switch to disconnect and/or connect virtual hierarchies of an endpoint from hosts that are connected based on multi-root input/output virtualization (MR-IOV). A management controller may instruct a SHPC to generate a PCI packet that specifies a particular virtual hierarchy to disconnect from a particular host. An upstream port connected to the host and the SHPC receives the PCI packet and uses a header that identifies the virtual endpoint in the packet to index into a routing table to identify a downstream port in the distributed switch that is connected to the endpoint. Once the PCI packet traverses the switch and arrives at the downstream port, the downstream port changes routing logic which logically disconnects the host from the specified virtual hierarchy.