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Re: [Freeipmi-users] Wrong values from a Winbond WPCM450 BMC

From: Paul van der Vlis
Subject: Re: [Freeipmi-users] Wrong values from a Winbond WPCM450 BMC
Date: Wed, 29 Oct 2014 23:12:02 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Icedove/24.8.1

op 29-10-14 21:27, Albert Chu schreef:
> On Wed, 2014-10-29 at 19:47 +0100, Paul van der Vlis wrote:
>> Helle Albert and others,
>> op 27-10-14 17:48, Albert Chu schreef:
>>> On Sat, 2014-10-25 at 20:11 +0200, Paul van der Vlis wrote:
>>>> Hello Albert,
>>>> op 25-10-14 19:47, Albert Chu schreef:
>>>>> Hi Paul,
>>>>> I doubt there was an issue with reading the wrong values from the BMC.  I
>>>>> have seen many BMCs where the vendor populates the BMC with "poor" choices
>>>>> of default values.  In fact, sometimes I've seen vendors populate the BMC
>>>>> with illegal values (e.g. 0x1-0x4 are the only legal values, but the
>>>>> default value populated in the BMC is 0x7).
>>>> Doesn't bmc-config read the actual used values, but something else?
>>> I'm not quite sure what you're asking here.  It reads the actual values
>>> stored in the BMC during a --checkout.
>> The BMC did work with me at home. At home I used the bios to configure
>> the IP.
>> After changing the IP in the datacenter with bmc-config the BMC did not
>> work anymore. I did only change the network settings (and later ARP
>> settings).
>> Then it's strange I have to edit the Volatile_Access_Mode and
>> Non_Volatile_Access_Mode. True?
> It is strange that the motherboard had these as "false" by default.

It did work before I changed the settings. So when this was the setting,
it should work with this setting. But it did not.

>>>> Is it possible to use a BMC from another vendor?
>>> Unlikely, given the BMC is part of the motherboard.
>> I can buy the motherboard I use with and without a BMC:
>> CoreIPM says on the website: "coreIPM-LINUX provides a ready to use,
>> extremely compact drop in solution for platform management. It is
>> specifically targeted towards shelf and appliance management."
> Personally, I've never heard of a 3rd party BMC available.

Maybe it has to do with OPMA, what's mostly used with AMD:

I saw Intel implementations too, e.g.:

Not sure this is the only way, the OPMA article also tell's about PCI
based management cards.

>>>> Which vendors make nice and good BMC's?
>>> To be very honest, most vendors solutions are fine.  They all make
>>> mistakes though.  You can see the history of bugs I've found in vendor
>>> solutions here:
>> When I see lists like this, I think: "most solutions are far from
>> perfect, they maybe work with their proprietary software, but give many
>> problems with standards compliant software."
> I should note that most of the bugs are simply that, bugs.  I wouldn't
> say it's an attempt from the vendor to make IPMI only work with their
> proprietary software.  They may perform the majority of QA against their
> proprietary software, which is part of the problem.

I think that's correct.

With regards,
Paul van der Vlis.

Paul van der Vlis Linux systeembeheer, Groningen

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