RadiSys ATCA-4616 Specifikace stáhnout pdf (Strana 14)

Shelf Management Overview

Major elements of the shelf management infrastructure

Thefollowingsectionsdescribethemajorelementsoftheshelfmanagementinfrastructure.

Shelf Manager

TheShelfManagerwatchesovermanageddevices,reportinganomalousconditionstothe

systemmanagerandtakingwhatevercorrectiveactionsitcantopreventsystemfailure.

The

ShelfManageralsomanageshot‐swapevents,detectingtheentry,removal,andshutdownof

removabledevicesintheshelf.

TheShelf Managercanaccessdataabouttheshelfcapabilitiesandthenmanagetheshelfand

itsFRUs(fieldreplaceableunits)sotheyoperatewithinthoseparameters.Forexample,the

ShelfManagernegotiatespowerbudgetswithFRUstokeepwithinthe shelf’stotalpower

capacity.TheShelfManagercanalsomonitoreventsfromFRUtemperaturesensorstodetect

whentemperaturesareoutsideofnormalrangesandcanthencontrolfanoperationin

response.

TheShelfManagerfunctionsaredividedbetweentheshelfmanagementcontroller(ShMC)

andtheshelfmanagementserver(ShMS):

•TheShMCdevicecontainsfirmwarethatperformsmostlow‐levelshelf‐management

services.TheShMCdevicealsoperformsIPMCfunctionsontheShelfManagermodule.

•TheShMSsoftwarerunsontheShelfManagermodule’slocalmanagementprocessorand

directlycommunicateswiththeShMC.TheShMSperformsthehigh‐levelshelf

managementfunctions.

IPMI and Intelligent Platform Management Bus (IPMB)

TheIPMIarchitectureincludes:

• Controllersthatmonitorandcontrolresourcesintheshelf

•Abusfortransportingmessages(IPMB)

•Acommunicationsprotocol

•Aprogramminginterfaceandmessagedefinition

TheIPMBisbasedoninter‐integratedcircuit(I

C)bustechnology,andisimplementedas

redundantbusesinRadisysshelves.TheIPMBprovidesthemaincommunicationlinkbetween

theShelfManagerandtheintelligentdevicesintheshelf.ThebusiscalledIPMB‐0,withthe

redundantbusesfurtheridentifiedasIPMB‐AandIPMB‐B.

Acarriermodule,liketheATCA‐1200QuadAMCcarrier,hasalocalIPMBorIPMB‐Lfor

communicatingwiththeadvancedmezzaninecards(AMCs)itcarries.Thecarrier’sIPMB‐Lis

separatedfromIPMB‐0bothelectricallyandbyuseofadifferentaddressspace.

1. Source:PICMG®3.0Revision3.0AdvancedTCABaseSpecification,March24,2008.

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RadiSys ATCA-4616 Specifikace Strana 14