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Software Architecture

Figure 7. SCM Shelf Manager redundancy

Shelf Manager failover

ComponentfailuresintheShMSandShMCaredetectedthroughthefollowingcombination

ofsendinganechorequestpacketthenwaitingforavalidresponse(pinging)andmonitoring

theperiodicwatchdogstrobes:

1. EachShMCpingsitspeerShMCovertheIPMB.

2. EachShMSattemptstopingitspeerShMSovertheLAN

interfaceonthebackplane.

3. IfpingsovertheLANinterfacefail,theShMStriestopingitspeerShMSusingthefailover

paththroughIPMBandtheserialinterfaces,asindicated inFigure 7.

SCM

ShMS

ShMC

IPMB-0 A interface

IPMB-0 B interface

Serial

interface

Serial

interface

ShMS/ShMC Synchronization Normal Path

ShMS Synchronization Failover Path

IPMB inter face

LAN interface

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RadiSys ATCA-4616 Specifiche Pagina 26