[mrtg] mathematical expressions for Collision statistics

[Tom McGovern]

Hi,

I'm trying to measure the amount of ethernet collisions as a percentage of
the overall interface traffic. I think this is what I want:

Target[13-col.192.168.254.127]:etherStatsCollisions.113:public at 192.168.254.1
27 / ifOutOctets.113:public at 192.168.254.127 +
ifInOctets.113:public at 192.168.254.127 &
etherStatsCollisions.113:public at 192.168.254.127 /
ifOutOctets.113:public at 192.168.254.127 +
ifInOctets.113:public at 192.168.254.127

Note I am just graphing the same variable twice fo simplicity.

But, how will MRTG interpret this formula ? Can I use parentheses in my
formular ?

Basically I need the following:

etherStatsCollisions / (ifInOctets + ifOutOctets) * 100

Thanks,

Tom McGovern


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