Your understanding is essentially correct. The blade chassis has one (or
optionally two) managment modules that monitor and control all of the
elements in the chassis. In BladeCenter implemenations, rpower, rinv,
rvitals, etc communicate with this module rather than talking directly to
the management processor on the blades. The management module communicates
with the blades over the internal networks. I suspect this is some
combination of proprietary protocols and IPMI.
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|| Scott S. Denham
|| Sr. Architect / Consulting IT Specialist
|| IBM Systems & Technology Group
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Dave Barry <[email protected]> wrote on 08/24/2013 10:32:36 PM:
> From: Dave Barry <[email protected]>
> To: xCAT Users Mailing list <[email protected]>,
> Date: 08/24/2013 10:34 PM
> Subject: [xcat-user] Bladecenter - How does rpower work?
>
> Hi all,
>
> I am working on setting up a bladecenter chassis with xCAT 2.8. It
> seems I have rpower working correctly, however I am seeking to
> understand the behind the scenes better.
> >From my understanding and reading some of the blade.pm code (if my
> understanding is correct), it looks like xCAT is using SNMP to talk
> to the chassis that each blade belongs to? Once the chassis receives
> the command from the management node, what is the next step it
> takes? Does it use some proprietary API to then control the blade's
power?
> Thanks for entertaining my attempts to gain a better understanding!
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