Editing Hardware Management/SpecsAndDesigns (section)

===Cloud Server Multi Node System Specification===

A description and requirements of a Cloud Server which is either a server, enclosure or rack that contains other uniquely addressable and managable devices.
The document's purpose is to have a single Ethernet connection to the Cloud Server and document the possible bus architectures, managment protocols and minimum expected functionality of the Nodes contained in the Cloud Server. 

The Clould Server's BMC with a Ethernet connection to the outside world is the called the Spine BMC and IPMI RMCP or RESTfull protocols are allowed. Internally the Spine BMC communicates to the Node using SMBus and GPIO which determines Node presence, Node power control and ALERT signaling.

The Node requirements include a subset of the IPMI 2.0 commands. The Spine BMC may have a Serial Console session to each Node.

[http://files.opencompute.org/oc/public.php?service=files&t=1eb58f54e79a48f0007de6b7379a093f Cloud Server Multi Node System Specification version V0.7.5, Date August 19,2015  PDF]

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