[mrtg] Math Operations

[Presciliano dos Santos Neto]

I'd like to graph OID1/OID3 and OID2/OID3:

This is how I'm trying:

Target[percent]: 1.1.1.1:public at router/3.3.3.3:public at router
                       &2.2.2.2:public at router/3.3.3.3:public at router

Isn't working ...

Any help ?

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