Thanks so much for the reply.

>> What do values of sysORUpTime represent?
>
>sysORUpTime OBJECT-TYPE
>    SYNTAX     TimeStamp
>    MAX-ACCESS read-only
>    STATUS     current
>    DESCRIPTION
>            "The value of sysUpTime at the time this conceptual
>            row was last instantiated."
>    ::= { sysOREntry 4 }
>

I did find this description in the MIB.  

>
>>  On 1 system, we've got values being populated:
>>
>> SNMPv2-MIB::sysORUpTime.1 = Timeticks: (6) 0:00:00.06
>> SNMPv2-MIB::sysORUpTime.2 = Timeticks: (6) 0:00:00.06
>
>>
>>
>>
>> and on another we have the following:
>>
>> SNMPv2-MIB::sysORUpTime.1 = Timeticks: (0) 0:00:00.00
>> SNMPv2-MIB::sysORUpTime.2 = Timeticks: (0) 0:00:00.00
>
>
>Two possibilities spring to mind:
>   a)  the second system is much faster than the first,
>        and is populating the sysORTable within the first second of operation
>

Very possible as the 'offending' system is a 10-core Power770 LPAR and the 
'reference' system is a 2-core Power6 LPAR.  

But, how would the speed of populating sysORTable affect the value of 
sysUpTime?  If I'm reading the description above correctly, it takes the value 
of sysUpTime and sets the next(?) instance of sysORUpTime.

>  b)  the second system does not support the sysORUpTime object
>

Quite possible, and I must apologize for this.  The 'offending' system is using 
net-snmp 5.5.0.0 whereas the 'reference' system is running net-snmp 5.4.1.2.  
Was sysORUpTime support perhaps deprecated in 5.5.x?


>
>> All zeroes are causing some concern amongst our monitoring staff.
>
>Is it just this table, or are you seeing this more widely?
>
>The sysORTable was a nice idea that never really worked.
>If that's the only thing that seems to be broken, then I wouldn't
>worry too much about it.
>

There are other sysOR* OIDs (sysORID, sysORDescr, etc), and others, that are 
populated.  

>Dave

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