Supermicro IPMI SNMP voltage value

Discussion in 'DIY Server and Workstation Builds' started by Tooms, Dec 2, 2018.

  1. Tooms

    Tooms New Member

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    Tring to monitor the BMC IPMI on SuperMicro X11SSZ-TLN4F


    Nagios1:/etc/mrtg# snmpwalk -c public -v 2c 10.20.1.39 1.3.6.1.4.1.21317.1.3.1 | grep ".48 "
    SNMPv2-SMI::enterprises.21317.1.3.1.1.48 = INTEGER: 48
    SNMPv2-SMI::enterprises.21317.1.3.1.2.48 = INTEGER: 191
    SNMPv2-SMI::enterprises.21317.1.3.1.3.48 = INTEGER: 1
    SNMPv2-SMI::enterprises.21317.1.3.1.4.48 = INTEGER: 1
    SNMPv2-SMI::enterprises.21317.1.3.1.5.48 = INTEGER: 166
    SNMPv2-SMI::enterprises.21317.1.3.1.6.48 = INTEGER: 158
    SNMPv2-SMI::enterprises.21317.1.3.1.7.48 = INTEGER: 156
    SNMPv2-SMI::enterprises.21317.1.3.1.8.48 = INTEGER: 200
    SNMPv2-SMI::enterprises.21317.1.3.1.9.48 = INTEGER: 205
    SNMPv2-SMI::enterprises.21317.1.3.1.10.48 = INTEGER: 207
    SNMPv2-SMI::enterprises.21317.1.3.1.11.48 = INTEGER: 2580
    SNMPv2-SMI::enterprises.21317.1.3.1.12.48 = INTEGER: 2580
    SNMPv2-SMI::enterprises.21317.1.3.1.13.48 = STRING: "12V "

    The "SNMPv2-SMI::enterprises.21317.1.3.1.2.48 = INTEGER: 191" is the reading value for the 12V power.
    BMC web interface is saying the value is "12.384 Volts"

    So how is the 191 translated into 12.384 ??
     
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  2. i386

    i386 Well-Known Member

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    191 * 0.064 maybe?
     
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  3. Tooms

    Tooms New Member

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    yes that also what i got, but it it only close to what the webinterface is saying, more correct value is 0.0641

    but how and where does this value come from and it is differen for each volt sensor.
     
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