[mrtg] Syntax for mathematical operations

Siegenthaler, Beat beat.siegenthaler at disetronic.ch
Thu Oct 11 17:12:10 MEST 2001


Maybe somebody can help me (There is nothing in FAQ).

After several sniffer sessions I find out, what OID's my 3Com RAS 1500 shows
up the usage of lines.

Unfortunately the Value for free is "2" and for occupied is "1"

Now I want to add all 4 Lines. The value for all occupied is "4" all free is

Now I see that 8 - (oid1 +oid2 +oid3 +oid4) must give out the used Lines.
But I can't adapt this syntax in the .cfg

Where is the missing link?

Kind Regards,

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