[mrtg] Re: Doing math with Multiple SNMP OID Targets

[Timothy Finkenstadt]

> Title[FRC_PAR_01.SYS]: Sys Volume Used Space
> Target[FRC_PAR_01.SYS]:4096000-1.3.6.1.4.1.23.2.28.2.14.1.4.1+1.3.6.143.2.28
> .2.14.1.5.1&4096000-1.3.6.1.4.1.23.2.28.2.14.1.4.1+1.3.6.143.2.28.2.14.1.5.1
> :public at 10.128.1.40

Are you trying to subtract the sum of the OIDs from 4096000?  there fore:
4096000 - (oid1 + oid2) 

if so, you should be able to do the following target:

Target[FC_PAR_01.SYS]:4096000 - \
1.3.6.1.4.1.23.2.28.2.14.1.4.1&1.3.6.1.4.1.23.2.28.2.14.1.4.1\
:public at 10.128.1.10 - \
1.3.6.143.2.28.2.14.1.5.1&1.3.6.143.2.28.2.14.1.5.1:public at 10.128.1.10

I think this may give what you are trying to accomplish.  If not, you can
change the OIDs as you require.

best regards,

tim



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