[mrtg] mathematical targets

[Timothy Finkenstadt]

howdy, mrtg folks.

I know I can do the following:

Target[total.external]: 3:public at router1 + 3:public at router2
and
Target[router3.mem]: 1.3.6.1.4.1.2467.1.34.17.1.10.1.1&1.3.6.1.4.1.2467.1.34.17.1.10.1.1:public at 192.168.235.2

Is there a way to do something like:

Target[mem-stats]: (128000000 - 1.3.6.1.4.1.2467.1.34.17.1.10.1.1:public at router3)&1.3.6.1.4.1.2467.1.34.17.1.10.1.1:public at router3
?

Since my target does not have a total or used memory OID, I need to do 
total-used for one of my targets.

Thanks,

tim


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